FLEX Ex

1797 Series

Technical Data

Intrinsically Safe I/O

FLEX Ex

TM

is a modular I/O system that mounts directly to the

controlled equipment in the hazardous area. This eliminates the need
for IS barriers/isolators and separation of control and process. We
have taken our experience gained with the standard FLEX I/O

TM

system and used it to create an intrinsically safe system with the same
look, feel, and ease of use.

Distributed Architecture

FLEX Ex leverages advanced technologies allowing the application to
move to a distributed architecture in the hazardous area.

Publication 1797-2.1 - April 2000

2 Overview

FLEX Ex

Overview

Overall Design of the
FLEX Ex System

FLEX Ex combines a terminal strip and intrinsic-safety isolation with
an I/O interface. Use the terminal strip on the terminal base to wire
your field devices directly.

•

modularity for distributed IS systems

•

all of the features of a larger, rack-based system

•

installation near the field devices to reduce wiring costs and
complexity

•

terminations for all field wiring eliminating the need for
marshalling or extra terminal strips

•

ControlNet

TM

-based networking solution with ControlNet Ex

TM

products

•

DIN rail mounting

FLEX Ex provides additional value if system problems develop.
The terminal base lets you remove and insert modules under power
without rewiring or disrupting your system. Combining your
field-wiring terminations, IS isolation, and the I/O interface into the
same location saves you time, money, and makes your system easier
to maintain and troubleshoot.

•

Dual-fault protection IS circuits provide the highest fault
tolerance.

•

I/O circuitry provides full IS field-device protection.

•

The modules themselves are IS protected for installation in
hazardous environments.

Publication 1797-2.1 - April 2000

FLEX Ex

Overview 3

ControlNet Ex Synergy

The combination of a ControlNet fiber hub (1786-RPA and -RPFM) and
a ControlNet Ex fiber hub (1797-RPA and -RPFM) allows for flawless,
high-speed, deterministic data flow and messaging between
hazardous and safe areas. This combination functions as an
intrinsically safe isolator between hazardous and safe areas and can
provide long-distance communication.

The diagnostic capabilities and determinism of the ControlNet
network make it an ideal choice for hazardous area applications.

The redundant media ControlNet Ex communications adapter
(1797-ACNR15) is high-speed and capable of communicating with as
many as 8 I/O modules for up to 128 I/O points.

ControlNet and ControlNet Ex repeater hubs facilitate the mixing of IS
and non-IS systems via a communications link incorporating fiber
optics for effective high-speed communication between hazardous
and safe areas.

An intrinsically safe network and I/O system installed in the
hazardous area allows your data to be gathered at its origin and
transported out of the area with the minimum amount of wiring. Cable
penetrations into the hazardous area, cable trays, and conduit are all
drastically reduced.

1

.

.

1

.

.

.

.

PLC-5/20C

TM

processor or

PLC-5/40C

TM

processor

host computer with
1784-KTC card

ControlNet network

FLEX I/O

FLEX Ex

ProcessLogix

TM

I/O

40051

1786 fiber hub

1797 fiber hub

Hazardous Area

Safe Area

coax

fiber

SLC 500

TM

processor

Publication 1797-2.1 - April 2000

4 Overview

FLEX Ex

Entity-Based Architecture

Entity parameters provide a system of quantifying and matching safe
levels for voltage, current, inductance, and capacitance when
connecting field devices and system devices together.

Configuration of the FLEX Ex system is based on the entity parameter
method. Using entity parameters allows high system flexibility in
matching field and system devices. This provides maximum utility to
the IS system designer and installer.

Entity Parameters

FLEX Ex uses entity parameters to rate its intrinsically safe modules.
Inputs and outputs are specified with:

•

open-circuit voltage (U

o

or V

oc

)

•

short-circuit current (I

o

or I

sc

)

•

allowed capacitance (C

o

or C

a

)

•

allowed inductance (L

o

or L

a

)

Switched outputs are specified as if they were inputs.

Field devices using entity parameters are specified with:

•

maximum input voltage (U

i

or V

max

)

•

maximum input current (I

i

or I

max

)

•

maximum internal capacitance (C

i

)

•

maximum internal inductance (L

i

)

In use, the sum of all the input C

i

or L

i

in a control loop cannot

exceed the C

o

or L

o

and the sum of all the U

o

or I

o

cannot exceed the

input U

i

or I

i

.

This is not meant to be a design example, only a short explanation of
how entity-based architectures help simplify IS system design.

Publication 1797-2.1 - April 2000

FLEX Ex

Overview 5

Entity Parameters Example

An output channel and the valve it will drive are illustrated in the
following figure. By comparing entity parameters, you can quickly
determine the appropriate match.

In this example, the combination is compatible because the valve can
withstand:

•

U

i

=

30V

•

I

i

=

165mA

These values are higher than what the output can provide:

•

U

o

=

23.7V

•

I

o

=

93.5mA

In the same way, the valve is characterized by:

•

C

i

=

22.5nF

•

L

i

=

730

µ

H

These values are lower than what the output allows:

•

C

o

=

66nF

•

L

o

=

2.5mH

40052

cable length = 10m

268

Ω

21V

22

Ω

+

sig

C

i

<10pF/m

L

i

<0.5uH/m

R<0.1

Ω

/m

P/I transmitter

EEx ia IIC T4

U

i

=30V

I

i

=165mA

C

i

=22.5nF

L

i

=730uH

Module

U

o

I

o

C

a

L

a

< or =
< or =
> or =
> or =

Total Loop

U

i

I

i

C

i

L

i

=
=
=
=

Transmitter

U

i

I

i

C

i

L

i

Distance

Cable

+

+

(length

*

C

i

per length)

(length

*

L

a

per length)

Module

U

o

<23.7V

I

o

<92.5mA

C

a

=66nF

L

a

=2.5mH

< or =
< or =
> or =
> or =

Total Loop

U

i

=30V

I

i

=165mA

C

i

=22.6nF

L

i

=735uH

=
=
=
=

Transmitter

U

i

=30V

I

i

=165mA

C

i

=22.5nF

L

i

=730uH

Distance

Cable

+

+

(10m

*

C

i

=10pF/m)

(10m

*

L

a

=0.5uH/m)

1797-IE8 Analog Input

EEx ia/ib IIB/IIC T4

U

o

<23.7V

I

o

<93.5mA

IIB

C

a

=560nF

L

a

=10mH

IIC

C

a

=66nF

L

a

=2.5mH

Publication 1797-2.1 - April 2000

6 Overview

FLEX Ex

About the FLEX Ex System

FLEX Ex consists of three space-saving components:

•

communication (adapters)

•

terminal base units

•

I/O modules

Ex

PWR

1797-ACNR15

PWR

Use the adapter to power the I/O bus for as many as
eight modules.
Two separate connection terminals for field power let
you daisy-chain power connections to adjacent terminal
bases depending on power consumption.
Removable power connections allow for easy wiring.

Use a the three-tier terminal base to wire
directly to field devices.
Terminate all of your wiring on the terminal base with
no need for terminal blocks.
Use the terminals to daisy-chain power
connections to adjacent terminal bases, or
connect individual power supplies to each base to
isolate modules as dictated by module power
requirements.
Adjust the keyswitch to prevent incorrect
module insertion into a preconfigured terminal base.
Exchange terminal bases without moving other bases
in your system.

Plug the Ex I/O module into the terminal base. Use
the module to connect to the I/O bus and field
devices.
Remove and insert a module without
disturbing field wiring, other I/O modules, or
system power.

Adapter

Bus Connectors

Terminal Base

Keyswitch

Flexbus Connector

Ex I/O Module

Terminal Strips

Field Power
Connection Terminals

20125-M

Publication 1797-2.1 - April 2000

FLEX Ex

Overview 7

Mount and Remove Your
System Easily

You can horizontally or vertically mount the FLEX Ex system on
a standard 35mm DIN rail. The adapter and terminal base easily snap
on the DIN rail by hand. Use a flat-blade screwdriver to remove
components from the DIN rail.

Screw holes allow you to horizontally or vertically panel-mount your
system in an enclosure. An example of a DIN-rail mounted system is
shown below.

ATTENTION

!

When properly installed, FLEX Ex is grounded
through the DIN rail to chassis ground. Use
zinc-plated, yellow-chromated steel DIN rail to
assure proper grounding. Using other DIN rail
materials (e.g. aluminum, plastic, etc.) which can
corrode, oxidize, or are poor conductors can result
in improper or intermittent platform grounding.

If installing FLEX Ex on non-recommended DIN rail
materials, use the mounting holes provided in each
terminal base or a 1794-NM1 mounting kit with
approved mounting bracket. Use mounting screws
with star washers to provide the FLEX Ex platform
with a chassis ground connection that is not likely to
be affected by shock, vibration, or oxidation over
time.

PWR

1797-ACNR15

DIN Rail
A-B part no. 199-DR1
DIN 46277-3
(35 x 7.5mm)

Screw holes are available
for panel-mounting.

Components are
slotted to accept a
DIN rail.

Locking tab connector holds
terminal base onto DIN rail.

20127-M

ATTENTION

!

The hook (on the terminal base) and adjacent
connection point (on the communication adapter)
keep the terminal bases tight together.

Publication 1797-2.1 - April 2000

8 Overview

FLEX Ex

Design Your Configuration

You can use as many as eight terminal bases per adapter. This
flexibility allows a wide variety of I/O channels per adapter. Mix and
match digital and analog I/O to meet your application needs.

Some examples include:

•

128 digital inputs

•

64 digital inputs and 16 digital outputs

•

64 analog inputs

•

32 analog inputs and 32 analog outputs

•

32 digital inputs, 8 digital outputs, 24 analog inputs, and 8
analog outputs

What this Technical Data
Contains

Use the following tables to find more information on the FLEX Ex
system.

Any combination of digital I/O or analog modules.

Adapter

As many as eight terminal bases.

20128-M

For Information On

See Page

Intrinsic Safety Terminology

10

Common Specifications

13

Environmental Conditions

13

Support, Training, and Repair Services

46

For Information On

Catalog Number Description

See Page

Communications

System

Dual Media Adapter

1797-ACNR15/B

Dual Media ControlNet Ex 1.5 Adapter

16

Repeaters

1797-RPA

ControlNet Ex Coax Drop Repeater Module

17

1797-RPFM

ControlNet Ex 3km Fiber Media Port Adapter

18

Taps

1797-TPS

ControlNet Ex Straight T-Tap

19

1797-TPR

ControlNet Ex Right Angle T-Tap

19

1797-TPYS

ControlNet Ex Straight Y-Tap

19

1797-TPYR

ControlNet Ex Right Angle Y-Tap

19

Terminators

1797-XT

ControlNet Ex 75

Ω

Terminator

19

1797-TCAP

ControlNet Tap Terminator

19

Ferrite

1797-FER

ControlNet Ex Trunk Ferrite Toroid

19

Publication 1797-2.1 - April 2000

FLEX Ex

Overview 9

For Information On

Catalog Number Description

See Page

Terminal Bases

Terminal Base Units

1797-TB3

3-Tier Screw Clamp Terminal Base Unit

20

1797-TB3S

3-Tier Spring Clamp Terminal Base Unit

21

Digital

DC Input

1797-IBN16

7.5V dc 16 pt Non-Isolated NAMUR Input
Module

22

DC Output

1797-OB4D

24V dc 4 pt Non-Isolated Source Output
Module

24

Analog

Analog Input

1797-IE8

8 pt 16 bit Single-Ended Non-Isolated Analog
Input Module

26

Analog Output

1797-OE8

8 pt 13 bit Single-Ended Non-Isolated Analog
Output Module

28

Specialty

Thermocouple/mV/RT
DInput

1797-IRT8

8 pt 16 bit Non-Isolated RTD/Thermocouple
mV Input Module

30

Frequency Input

1797-IJ2

2 Input Frequency Module

32

Power Supply

DC Quad-Ex

1797-PS2N

24V DC In Quad-Ex DC Out Power Supply
- Conduit Pipe Thread

35

1797-PS2E

24V DC In Quad-Ex DC Out Power Supply
- Increased Safety

35

Accessories

1797-BOOT

ControlNet Ex BNC Boot

41

1797-INS

ControlNet Ex Trunk Insulators Kit

41

1797-EXMK

FLEX Ex Cable Marking Kit

41

Extender Cables

1794-CE1

FLEX I/O Extender Cable, 0.3m (1ft)

42

1794-CE3

FLEX I/O Extender Cable, 0.9m (3ft)

42

Under

Development

Bus Isolator Module

1797-BIC

Bus Isolator Module - Hazardous Modules to
IS Modules

44

Connectors

1797-CEC

Flexbus Connector

44

1797-CEFTE

Flexbus Metric Feed-Through

45

1797-CEFTN

Flexbus NPT Feed-Through

45

Extender Cables

1797-CE1S

FLEX Ex Extender Cable, 0.3m (1ft)

45

1797-CE3S

FLEX Ex Extender Cable, 0.9m (3ft)

45

Publication 1797-2.1 - April 2000

10 Intrinsic Safety Terminology

FLEX Ex

Intrinsic Safety Terminology

Understanding Some
Intrinsic Safety
Terminology

Read the following sections for more information on the general
guidelines of intrinsic safety.

Hazardous Area Designation

A hazardous area is designated as any location in which a combustible
material is or may be present in the atmosphere in sufficient
concentration to produce an ignitable mixture.

The North American method identifies these areas by Class, Division,
and Group while the IEC (CENELEC) designates these areas by Zone
and Gas Group.

Recently, North America has adopted the Zone method of identifying
hazardous locations as an option to the Division method.

Class Designation

Class identifies the type of hazardous atmosphere.

Division/Zone Designations

Division/Zone identifies the likelihood of a hazardous atmosphere
being present.

Class I

Gas or vapor

Class I

Dust

Class III

Fiber or flying (no group designation)

Division Method
(North America)

IEC Standard
Zone Method

Ignitable mixture present continuously
(long periods)

Division 1

Zone 0
(Zone 20-Dust)

Ignitable mixture present intermittently

Zone 1
(Zone 21-Dust)

Ignitable mixture is not normally present

Division 2

Zone 2
(Zone 22-Dust)

Publication 1797-2.1 - April 2000

FLEX Ex

Intrinsic Safety Terminology 11

Gas/Dust Groups

Hazardous locations are grouped according to their ignition
properties.

Use in Class II and III (Dusts and Fibers) Hazardous Locations (North America)

FLEX Ex modules are rated for installation in Class I Division 1 & 2,
Groups A-D hazardous areas. They are also rated to connect to field
devices that are located in Class I, II, or III, Groups A-G hazardous
areas.

If FLEX Ex components are installed in a Class II or III location in your
application, you can mount them in a suitable, dust-proof enclosure
with the appropriate connectors, glans, and seals. For example, a
NEMA 6 enclosure may be appropriate.

As always, observe local code requirements when applying your FLEX
Ex application.

Use in Zone Method Dusts and Fibers Hazardous Locations

FLEX Ex modules are rated for installation in North American Class I
Zone 1 & 2, Groups IIC, IIB & IIA and European Zone 1 & 2, Groups
IIC, IIB, & IIA hazardous areas. They are also rated to connect to field
devices that are located in North American Class I Zone 0, 1, & 2
Groups IIC, IIB & IIA and European Zone 0, 1, & 2, Groups IIC, IIB, &
IIA hazardous areas.

If FLEX Ex components are installed in a North American or European
Zone method dust or fiber location in your application, you can
mount them in a suitable, dust-proof enclosure with the appropriate
connectors, glans, and seals. For example, a North American NEMA 6
or European IP 6x enclosure may be appropriate.

As always, observe local code requirements when applying your FLEX
Ex application.

Typical Gas

IEC Gas Group

North American Gas Group

Acetylene

IIC

A

Hydrogen

IIC

B

Ethylene

IIB

C

Propane

IIA

D

Methane

1

I

D

1

Metal Dust

-

E

Coal Dust

-

F

Grain Dust

-

-

1

Mining applications under jurisdiction of MSHA.

Publication 1797-2.1 - April 2000

12 Intrinsic Safety Terminology

FLEX Ex

For Zone application, especially in Europe, normal practice calls for
the end application to obtain the dust and fiber rating due to strong
dependence on wiring and other non-equipment related
requirements. For example, FLEX Ex’s North American Class I Zone 0,
1, & 2 Groups IIC, IIB & IIA and European Zone 0, 1, & 2, Groups IIC,
IIB & IIA hazardous area rating is used as the basis for the overall
application to gains its dust and fiber certification.

Methods of Protection

The following techniques are rated by methods of protection.

Temperature Category

The temperature category defines the maximum surface temperature
of the device. Ratings are given with reference to 40

o

C ambient unless

otherwise stated.

Technique

IEC Symbol for

Protection Method

Permitted Zone

Permitted Division

Oil Immersion

Ex o

1 and 2

*

Pressurization

Ex p

1 and 2

1 and 2

Powder Filling

Ex q

1 and 2

*

Flameproofing
(Explosion Proof)

Ex d

1 and 2

1 and 2

Increased Safety

Ex e

1 and 2

*

Intrinsic Safety

Ex ia

0, 1, and 2

1 and 2

Intrinsic Safety

Ex ib

1 and 2

*

Non-Incendive

Ex n

2

2

Encapsulation

Ex m

1 and 2

*

Special Protection

Ex s

0, 1, and 2

*

*

These protection methods are not recognized in the Division method. However, they may be
suitable for some North American Division applications.

T1

450

o

C (842

o

F)

T3A

180

o

C (356

o

F)

T2

300

o

C (572

o

F)

T3B

165

o

C (329

o

F)

T2A

280

o

C (536

o

F)

T3C

160

o

C (320

o

F)

T2B

260

o

C (500

o

F)

T4

135

o

C (275

o

F)

T2C

230

o

C (446

o

F)

T4A

120

o

C (248

o

F)

T2D

215

o

C (419

o

F)

T5

100

o

C (212

o

F)

T3

200

o

C (392

o

F)

T6

85

o

C (185

o

F)

The additional temperature categories highlighted above are for North America only.

Publication 1797-2.1 - April 2000

FLEX Ex

Intrinsic Safety Terminology 13

The following table illustrates common FLEX Ex system specifications.

The following table illustrates FLEX Ex system environmental
conditions.

About Entity Parameters

For a complete listing of I/O entity parameters, refer to the FLEX Ex
System Certification Reference Manual, publication 1797-6.5.6.

Agency Certification

Certificate

Dimensions (HxWxD)

1797-ACNR15/B

II 2G EEx ib IIB/IIC T4

Class I Division 1 & 2 Groups A-D T4

Class I Zone 1 & 2 AEx ib IIC T4

DMT 99 ATEX E 008 X

UL, cUL 99.19699

94mm x 94mm x 91mm

(3.7in x 3.7in x 3.58in)

1797-RPA

DMT 99 ATEX E 011 X

UL, cUL 99.19699

1797-RPFM

II (1) 2G EEx ia/ib IIB/IIC T4

Class I Division 1 & 2 Groups A-D T4

Class I Zone 1 & 2 AEx ib/[ia] IIC T4

1797-TB3

II 2G EEx ia IIC T4

Class I Division 1 & 2 Groups A-D T4

Class I Zone 1 & 2 AEx ia IIC T4

DMT 98 ATEX E 012 X

UL, cUL 99.19699

94mm x 94mm x 69mm

(3.7in x 3.7in x 2.7in)

1797-TB3S

1797-IBN16

II (1) 2G EEx ia/ib IIB/IIC T4

Class I Division 1 & 2 Groups A-D T4

Class I Zone 1 & 2 AEx ib/[ia] IIC T4

DMT 98 ATEX E 013 X

UL, cUL 99.19699

46mm x 94mm x 75mm

(1.8in x 3.7in x 2.95in)

1797-OB4D

DMT 98 ATEX E 040 X

UL, cUL 99.19699

1797-IE8

DMT 98 ATEX E 020 X

UL, cUL 99.19699

1797-OE8

DMT 99 ATEX E 051 X

UL, cUL 99.19699

1797-IRT8

DMT 98 ATEX E 023 X

UL, cUL 99.19699

1797-IJ2

DMT 98 ATEX E 033 X

UL, cUL 99.19699

1797-PS2N

Class I Division 1 Groups C-D T4
Class I Division 2 Groups A-D T4

UL, cUL 99.19699

174mm x 174mm x 128mm

(6.9in x 6.9in x 5.04in)

1797-PS2E

EEx de [ib] IIC T4

BVS 98.D.2055X

174mm x 174mm x 280mm

(6.9in x 6.9in x 11.0in)

1797-BIC

II 2G [EEx ib] IIB/IIC T4

Class I Division 1 & 2 Groups A-D T4

Class I Zone 1 & 2 [AEx ib] IIC T4

Pending

Pending

C

US

Environmental Conditions

Ope

ra

tio

na

l

Te

m

p

er

a

tur

e

St

o

rage

Te

m

p

er

a

tur

e

Rel

a

ti

ve

Hu

midi

ty

Ope

rat

ing

Sh

oc

k

N

on-

O

p

er

at

in

g

Sh

oc

k

V

ibr

at

io

n

-20 to 70

o

C

(-4 to 158

o

F)

-40 to 85

o

C

(-40 to 185

o

F)

5 to 95%

noncondensing

Tested 15g peak

acceleration,

11(+1)ms pulse

width

Tested 15g peak

acceleration,

11(+1)ms pulse

width

Tested 2g @

10-500Hz per

IEC 68-2-6

Publication 1797-2.1 - April 2000

14 Communication System

FLEX Ex

Communication System

ControlNet Ex System Diagram

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

Sa

fe

Are

a

C

N

et

Ex

trk

t

rm

3067

0-

M

Cont

ro

lN

et

Ex

ta

p

CN

et E

x

trk

t

rm

The Coa

x T

run

k Cable is

per

mit

ted t

o ha

ve a ma

ximum

lengt

h of

1,00

0m wit

h only

2 co

nnect

ed

Cont

ro

lN

et

Ex

T

aps

d

ro

pping t

o only

2

50m wit

h t

he max

imum allow

ed conne

ct

ed Cont

ro

lN

et

Ex

Ta

ps of

48.

Ha

za

rd

ou

s Are

a

Zo

ne 0

The Con

tr

olN

et

Ex Sy

st

em is

an int

ri

nsic

ally s

af

e sy

st

em ac

cor

ding

to

EN

500

39. W

hen ins

tal

ling t

he

sy

st

em, t

he c

er

tif

ic

at

e of

con

for

mi

ty

and t

he n

at

ional ins

ta

llat

ion r

egula

tio

ns mus

t be heed

ed. The

com

ponent

s o

f t

he

Cont

ro

lN

et

Ex

sys

te

m and t

he i

nt

er

connec

ti

ons ar

e s

hown o

n t

he ins

tal

lat

ion

dr

awing (A

-B

Pub. 1797-

6.5.6)

.

fib

er

Ci <

60pF

C

ont

ro

lN

et

Ex

ta

p

Cont

ro

lN

et

Ex

ta

p

C

ont

ro

lN

et

Ex

t

ap

CN

et

Ex

ta

p trm

Ci <

68

pF

Li n

egl.

ChB

Ch

A

U

o=5.4V

,

Io=1

60mA

,

F

-3

>500k

H

z

Powe

r Suppl

y U

i=9

.5V

,

Ii=1A

,

Ci<

120nF

,

Li

=ne

gligible

coax

t

runk

cabl

e

Ch1

The am

bient

t

emper

at

ur

e r

ang

e of

t

he Cont

ro

lN

et

E

x sy

st

em is

-

20 t

o +70

o

C.

N

ode 4

... 48

Fl

ex

bus

U

o=5.

4V

,

Io

=400m

A

,

Po=2.1

6W

,

Co=

65

µ

F,

Lo

=10

µ

H

Fo

r t

he

tr

ans

mit

ta

l bet

ween

t

he saf

e ar

ea

and t

he ha

za

rdou

s ar

ea on

ly opt

ic

al glas

s-

fi

ber

s ar

e

per

mit

ted. T

he diame

ter

o

f a

single

glass

-f

ibe

r m

ust

be >6

um. The

power

dens

it

y of

t

he t

rans

mit

te

r

diod

e must

be

>5mW

/mm

2

.

Pr

ot

ec

t t

he

sys

te

m agains

t elect

ro

st

at

ic

char

ge.

Post

a s

ign nea

r t

he

main co

mponent

s of

t

he sy

st

em:

A

tt

ent

ion!

A

void elec

tr

os

ta

ti

c ch

ar

ge

.

179

7-

A

C

N

R

15

/*

or

RS

D-

GW-

Ex2

.CN

U

o=5.

4V

,

Io=

160m

A

,

F

-3

>500k

H

z

75 O

hm

1W

Ci n

egl.

Li

negl.

Ch

B

ChA

U

o=5.

4V

,

Io=160

mA

,

F

-3

>5

00kH

z

Po

wer

S

upply

U

i=9.5

V,

Ii=1A

,

Ci<

120

nF

,

Li

=neglig

ible

N

ode

3

Fle

xbus

Uo

=5

.4

V,

Io=400

mA

,

Po=2

.16W

,

Co=65

µ

F,

Lo=10

µ

H

17

97

-A

C

N

R

15

/*

or

RSD-

G

W

-Ex2

.CN

U

o=5.4V

,

Io=16

0mA

,

F

-3

>500

kH

z

N

ear

t

he main com

ponent

s of

t

he

syst

em

a plat

e wit

h t

he

syst

em

mar

king must

be at

ta

ched. If

the sy

st

em is

inst

alle

d in a c

abinet

t

he pl

at

e must

be

f

ix

ed on

th

e inside

of

t

he cabi

net

door

.

*R

G

6-

C

N

et

is

def

ine

d as:

C

able Im

pedan

ce =

75 O

hm

+ or

-

3 O

hm

Cable Cap

acit

an

ce <

6.0nF

per

100

m

Cable Res

ist

an

ce >

9.08 O

hm

per

10

0m

Cable A

tt

enua

ti

on (-

20

to

+70

o

C) 0.

2M

H

z >

0

.93dB/

100m

5M

H

z >

1.3

9dB/

100m

0.5MH

z >

0.95

dB/

100m

10M

H

z

> 1.86d

B/

10

0m

1MH

z >

1.07dB/

100

m

20M

H

z

> 2.73d

B/

10

0m

2

M

H

z >

1.16dB/

100

m

50M

H

z >

4.3

3dB/

100m

coax t

ru

nk

cable

Cab

le t

ype

1189

A

, 3

092A

, or

3092A

Blu

e f

ro

m m

anuf

ac

tu

re

r

Belde

n W

ire or ty

pe

RG6-CN

et*

Li <

560nH

Li

< 110

0uH

Li

< 11

00uH

75 O

hm

1W

Ci

negl.

Li

negl

.

N

ode

1

Ha

za

rd

ou

s Ar

e

a

Zone 1

1797

-R

PA

/*

or

RS

D-

C

FA-E

x.CN

No

de 2

1797

-R

PF

M/

* o

r

RSD-

FC-

Ex2

.C

N

3

km

17

97

-R

PF

M/

* or

RS

D-

FC-E

x2

.CN 3

km

fi

ber

Ch0

fi

ber

Ch1

fi

ber

Ch0

Uo

=5

.4

V,

Io=20

1mA

,

F>

500k

H

z

Power

Supply

U

i=9

.5V

,

Ii=1A

,

Ci<

120nF

,

Li

=neg

ligible

Publication 1797-2.1 - April 2000

FLEX Ex

Communication System 15

Describing the ControlNet Ex System Diagram

A maximum of 48 ControlNet Ex nodes may be connected together
by 250m of coax cable and 48 taps. The distance increases to 1000m
when you use only 2 taps. See the table below for more
information.

The fiber media of the 1797-RPFM can be installed in a hazardous
location (Zone 0, 1 or 2; Class I, Zones 0, 1, and 2; Class I, Division
1 and 2; Class II, Division 1 and 2; Class III, Division 1 and 2) to
connect two 1797-RPFM modules or they can be installed through
different locations into the non-hazardous location to connect the
1797-RPFM with any approved associated apparatus.

All cables and fiber media that are not light blue must be marked as
IS using the 1797-EXMK marking kit or other locally approved IS
identification and/or segregation method.

During the installation of the ControlNet Ex system, all metallic parts
must be isolated to prevent an earth connection (high voltage
withstanding of isolating material must be > 500V ac).

System Diagram
Name

Catalog Number

Catalog Name

Description

1797-RPA

1797-RPA

ControlNet Ex Modular
Repeater Adapter

Represents one ControlNet Ex node and must be
connected to a coax trunk cable by
1797-TPx

1797-RPFM

1797-RPFM

ControlNet Ex Fiber Repeater
Module, Medium Distance

Allows connection of a maximum of two devices per
1797-RPA and is powered directly by 1797-RPA

1797-ACNR15

1797-ACNR15

Redundant Media ControlNet
Ex Adapter

Represents one ControlNet Ex node and must be
connected to a coax trunk cable by
1797-TPx -each one with two redundant output
channels that are connected to different ControlNet Ex
networks (coax cables and 1797-TPx)

CNet Ex Tap Trm

1797-TCAP

ControlNet Ex Tap (Dummy)
Terminator

Represents one ControlNet Ex node and is a simple
capacitor (56pF) with a coax connector

ControlNet Ex Tap

1797-TPx

ControlNet Ex Coax Tap

Four types of connections available: S (straight t-tap),
R (right angle t-tap), YS (straight y-tap), and YR (right
angle y-tap) - a maximum of 48 taps can be connected
together by coax trunk cable

CNet Ex Trk Trm

1797-XT

ControlNet Ex Trunk
Terminator

Simple resistor (75

Ω

) with coax connector that must

be on each end of the ControlNet Ex coax trunk for
termination

Coax Trunk Cable

1797-RG6

Quad-Shield, RG-6 75

Ω

Coax

Trunk Cable

Maximum (functional) length between 2 1797-TPx is
3280ft (1000m) - each 1797-TPx reduces the
(functional) coax cable length by 53.4ft (16.3m)

None

None

Standard Coax Trunk Cable
BNC Couplers

Different standard cable couplers, 90

o

, 180

o

, etc.

Publication 1797-2.1 - April 2000

16 Dual Media ControlNet Ex 1.5 Adapter Cat. No. 1797-ACNR15/B

FLEX Ex

Dual Media ControlNet Ex 1.5 Adapter Cat. No. 1797-ACNR15/B

Product Features

•

Module: EEx ib IIB/IIC T4, Class I Division 1
Group A-D

•

Provides interface from the local backplane
I/O bus to the network fieldbus

•

Provides power to the backplane to run bus
interface circuitry aboard I/O modules

•

Capable of accepting dual ControlNet Ex
cable media

Customer Connections

PWR

1797-ACNR15

40054

+V

-V

Power

Supply

Channel A

Channel B

Network

uC

Dual

Port

RAM

Bus

uC

Flexbus

40055

1797-ACNR15/B Specifications

I/O Capacity

8 modules

IS Media Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4
Class I Division 1 & 2 Groups A-D T4

Communication Rate

5m bit/s

ControlNet Ex BNC
(ChA and ChB)

Oscillation powered by:
U

o

< 5.4V dc

I

o

< 160mA

ac coupled with high-pass filter f > 500kHz

Indicators

Comm A

red/grn

Comm B

red/grn

Module Status

red/grn

Power

grn

Output (Intrinsically Safe)

(16 pin male and female
flexbus connector)

U

o

< 5.8V dc

I

o

< 400mA

P

o

< 2.16W

L

o

< 10

µ

H

C

o

< 65

µ

F

Isolation Path

Flexbus to Power Supply

Galvanic to DIN EN50020

Flexbus to ControlNet

Galvanic functional

ControlNet Ex Node to
Other Node

Galvanic functional

ControlNet Ex to
Power Supply

Galvanic to DIN EN50020

Power Supply

(+V, -V Intrinsically Safe)

U

i

< 9.5V dc

I

i

< 1A

P

i

< 9.5W

L

i

= Negligible

C

i

< 120nF

Power Consumption

8.5W

Power Dissipation

8.5W

Thermal Dissipation

29 BTU/hr

Conductor Wire Size

12 gauge (4mm

2

) stranded maximum

3/64in (1.2mm) insulation maximum

Weight

Approximately 200g

Environmental Conditions

Operational Temperature

-20 to 70

o

C (-4 to 158

o

F)

Storage Temperature

-40 to 85

o

C (-40 to 185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Non-Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC 68-2-6

Agency Certification

II 2G EEx ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib IIC T4

Certificates

DMT 99 ATEX E008 X

1797-ACNR15/B Specifications

C

US

Publication 1797-2.1 - April 2000

FLEX Ex

ControlNet Ex Coax Drop Repeater Module Cat. No. 1797-RPA 17

ControlNet Ex Coax Drop Repeater Module Cat. No. 1797-RPA

Product Features

•

Functions as part of the fiber repeater hub
within the hazardous area to extend the
length of the ControlNet Ex segments to
interlink systems all operating within the area

•

Functions as the intelligent starter block for a
multiport repeater

•

Configured with at least one media adapter

Customer Connections

1

3

2

4

+V

+V

-V

-V

1797-RPA

PWR

REPEATER

ADAPTER

COMM

STATUS

MODULE

STATUS

40056

41309

power
supply

+V

-V

channel

network

bus

uC

uC

fiber hub bus

1797-RPA Specifications

I/O Capacity

2 fiber modules

IS Media Type

EEx ib IIB/IIC,
AEx ib IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

Communication Rate

5m bit/s

ControlNet Ex BNC

Oscillation powered by:
U

i

< 5.4V dc

I

i

< 201mA

ac coupled with high-pass filter f > 900kHz

Indicators

Comm

green/red

Module

green/red

Power

green

Output (Intrinsically Safe)

(30 pin male TTL bus
connector)

Manufacturer specific bus
U

o

< 5.4V

I

o

< 201mA

P

o

< 1.09W

L

o

< 0.45mH

C

o

< 71

µ

F

Isolation Path

Bus to Power Supply

Galvanic to DIN EN50020

Adapter to Adapter

Galvanic functional

ControlNet Ex Node to
Other Node

Galvanic functional

ControlNet to Power Supply

Galvanic to DIN EN50020

Power Supply

(-V, +V Intrinsically Safe)

U

i

< 9.5V dc

I

i

< 1A

P

i

< 9.5W

L

i

= negligible

C

i

< 120nF

Power Consumption

8.5W

Power Dissipation

8.5W

Thermal Dissipation

29 BTU/hr

Conductors

Wire Size

12 gauge (4mm

2

) stranded maximum

3/64in (1.2mm) insulation maximum

Dimensions (HxWxD)

94mm x 94mm x 91mm (3.7in x 3.7in x 3.58in)

Weight

Approximately 200g

Environmental Conditions

Operational Temperature

-20 to 70

o

C (-4 to 158

o

F)

Storage Temperature

-40 to 85

o

C (-40 to 185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Non-Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC 68-2-6

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib IIC T4

Certificates

DMT 99 ATEX E011 X

1797-RPA Specifications

C

US

Publication 1797-2.1 - April 2000

18 ControlNet Ex 3km Fiber Media Port Adapter Cat. No. 1797-RPFM

FLEX Ex

ControlNet Ex 3km Fiber Media Port Adapter Cat. No. 1797-RPFM

Product Features

•

Functions as part of the fiber repeater hub
within the hazardous area to extend the
length of the ControlNet Ex segments to
interlink systems all operating within the area

•

Functions as a non-intelligent fiber to
backplane conversion device

•

Converts glass fiber infrared LED media
signals to backplane signals for use by the
coax drop repeater module (cat. no.
1797-RPA)

Customer Connections

1797-RPFM

Recv

Xmit

Recv

Xmit

Chan 1

Chan 2

FIBER MODULE

MEDIUM RANGE

40057

41310

channel 1

channel 2

receiver

receiver

transmitter

transmitter

bus

proc

fiber hub bus

1797-RPFM Specifications

IS Media Type

EEx ia IIB/IIC T4,
AEx ia IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

Communication Rate

5m bit/s

Approximate Fiber
Media Length

3km

Fiber Type

62.5/125 mm multi-mode

Fiber Termination Type

ST (plastic or ceramic)

Fiber Operating Wavelength

1300 nm

Optical Power Budget

13.3 dB

Fiber Optic Transmitter

Ch1 and Ch2

Optical peak output power
P

optical

< 1mW

Indicators

Channel 1 status - green
Channel 2 status - green

Input (Intrinsically Safe)

(30 pin female TTL bus
connector)

U

i

< 5.4V

I

i

< 201mA

P

i

< 1.1W

L

i

< 15

µ

H

C

i

< 41

µ

F

Output (Intrinsically Safe

(30 pin male TTL bus
connector)

U

o

< 5.4V

I

o

< 201mA

P

o

< 1.1W

L

o

< 0.45mH

C

o

< 71

µ

F

Isolation Path

Bus to ControlNet

Galvanic to DIN EN50020

Power Consumption

Included in 1797-RPA

Power Dissipation

Included in 1797-RPA

Thermal Dissipation

Included in 1797-RPA

Weight

Approximately 100g

Environmental Conditions

Operational Temperature

-20 to 70

o

C (-4 to 158

o

F)

Storage Temperature

-40 to 85

o

C (-40 to 185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Non-Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC 68-2-6

Dimensions (HxWxD)

94mm x 94mm x 91mm (3.7in x 3.7in x 3.58in)

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib/[ia] IIC T4

Certificates

DMT 99 ATEX E011 X

1797-RPFM Specifications

C

US

Publication 1797-2.1 - April 2000

FLEX Ex

ControlNet Ex Taps and Terminators Cat. Nos. 1797-TPS, -TPR, -TPYS, -TPYR, -XT and -TCAP 19

ControlNet Ex Taps and Terminators Cat. Nos. 1797-TPS, -TPR, -TPYS, -TPYR, -XT and -TCAP

ControlNet Ex Straight T-Tap

Cat. No. 1797-TPS

ControlNet Ex Right-Angle T-Tap

Cat. No. 1797-TPR

ControlNet Ex Straight Y-Tap

Cat. No. 1797-TPYS

ControlNet Ex Right-Angle Y-Tap

Cat. No. 1797-TPYR

40058

40059

40060

40061

ControlNet Ex 75

Ω

Terminator

Cat. No. 1797-XT

ControlNet Tap Terminator

Cat. No. 1797-TCAP

40875

40874

ControlNet Ex Trunk Ferrite

Toroid Cat. No. 1797-FER

41676

Publication 1797-2.1 - April 2000

20 3-Tier Screw Clamp Terminal Base Unit Cat. No. 1797-TB3

FLEX Ex

3-Tier Screw Clamp Terminal Base Unit Cat. No. 1797-TB3

The 1797-TB3 terminal base unit is intended for
users preferring the screw-type wire retention
method.

You can use the 1797-TB3 terminal base unit with
any module on the FLEX Ex system. Specific
terminal function is governed by the I/O module
itself. Check the installation instructions for each
module to determine the specific terminal
functions.

The 1797-TB3 terminal base also has connections
for cold junction compensation and terminals
designated for shield termination to chassis
ground.

The terminal base is equipped with a
factory-installed tab cover for the backplane bus
connection. The tab cover may be removed only
when the terminal base unit is connected to other
terminal base units or 1794-CE1 or -CE3 extender
cables.

ATTENTION

!

Make certain that the hook on the terminal base
you are installing is properly hooked into the
adjacent terminal base/adapter. Failure to lock
the hook into the adjacent base/adapter can
result in loss of communication on the
backplane.

ATTENTION

!

Do not force the terminal base into the adjacent
base/adapter. Forcing the units together can
bend or break the hook and allow the units to
separate and break communication over the
backplane.

40062

Specifications - 1797-TB3
Number of Terminals

1 row of 16, 2 rows of 18

Terminal Screw Torque

7-9 inch-pounds

Terminals Assignments

+34, -35, +50, -51, and 96
pin female I/O connector
pins 30-32, 62-64, 94-96

Only for intrinsically safe circuits
U

i

<10V dc

I

i

<2.5A

C

i

<1nF

L

i

Negligible

36, 49

Must not be used for any connection

All Other Terminals

U

i

<30V dc

I

i

<100mA

C

i

<1nF

L

i

Negligible

Flexbus Connection
Intrinsically Safe

U

i

<10V dc

I

i

<400mA

C

i

<1nF

L

i

Negligible

Isolation Voltage

Channel-to-channel isolation determined by inserted
module

Weight

200g (approximately)

Dimensions (with module
installed in base)

Inches
(Millimeters)

3.7H x 3.7W x 2.7D
(94H x 94W x 69D)

Environmental Conditions

Operational Temperature

-20 to 70

o

C (-4 to 158

o

F)

Storage Temperature

-40 to 85

o

C (-40 to 185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested 15g peak acceleration, 11 (+1)ms pulse width

Non-Operating

Tested 15g peak acceleration, 11 (+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC 68-2-6

Conductors

Wire Size

12 gauge (4mm

2

) stranded maximum

1.2mm (3/64in) insulation maximum

Agency Certification

II 2G EEx ia IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ia IIC T4

Certificates

DMT 98 ATEX E012 U

Termination connections are unique with each I/O module. Refer to the appropriate I/O module’s
installation instructions.

C

US

Wiring Connections for Terminal Base 1797-TB3

0

1

3

2

4

5

6

7

8

9

10

11 12 13 14

15

26

27 28 29 30

31 32 33

25

24

23

22

21

20

19

18

17

16

44

45 46 47 48

49 50 51

43

42

41

40

39

38

37

36

35

34

41252

+V -V

-V

+V

A

B

C

No connections allowed to terminals 36 and 49

Publication 1797-2.1 - April 2000

FLEX Ex

3-Tier Spring Clamp Terminal Base Unit Cat. No. 1797-TB3S 21

3-Tier Spring Clamp Terminal Base Unit Cat. No. 1797-TB3S

The 1797-TB3S terminal base unit is intended for
users preferring the spring-type wire retention
method.

You can use the 1797-TB3S terminal base unit with
any module on the FLEX Ex system. Specific
terminal function is governed by the I/O module
itself. Check the installation instructions for each
module to determine the specific terminal
functions.

The 1797-TB3S terminal base has 36 wiring
connections to/from a plug-in module. The use of
each terminal depends on the module mounted in
this base. It also has connections for cold junction
compensation and terminals designated for shield
termination to chassis ground.

The terminal base is equipped with a
factory-installed tab cover for the backplane bus
connection. The tab cover may be removed only
when the terminal base unit is connected to other
terminal base units or 1794-CE1 or -CE3 extender
cables.

ATTENTION

!

Make certain that the hook on the terminal base
you are installing is properly hooked into the
adjacent terminal base/adapter. Failure to lock
the hook into the adjacent base/adapter can
result in loss of communication on the
backplane.

ATTENTION

!

Do not force the terminal base into the adjacent
base/adapter. Forcing the units together can
bend or break the hook and allow the units to
separate and break communication over the
backplane.

40063

Specifications - 1797-TB3S
Number of Terminals

1 row of 16, 2 rows of 18

Terminal Type

Spring-clamp - To open, insert bladed screwdriver
(0.100 - 0.120in/2.54-3.05mm) and lift up.

Terminals Assignments

+34, -35, +50, -51, and 96
pin female I/O connector
pins 30-32, 62-64, 94-96

Only for intrinsically safe circuits
U

i

<10V dc

I

i

<2.5A

C

i

<1nF

L

i

Negligible

36, 49

Must not be used for any connection

All other terminals

U

i

<30V dc

I

i

<100mA

C

i

<1nF

L

i

Negligible

Flexbus Connection
Intrinsically Safe

U

i

<10V dc

I

i

<400mA

C

i

<1nF

L

i

Negligible

Isolation Voltage

Channel-to-channel isolation determined by inserted
module

Weight

200g (approximately)

Dimensions (with module
installed in base)

Inches
(Millimeters)

3.7H x 3.7W x 2.7D
(94H x 94W x 69D)

Environmental Conditions

Operational Temperature

-20 to 70

o

C (-4 to 158

o

F)

Storage Temperature

-40 to 85

o

C (-40 to 185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested 15g peak acceleration, 11 (+1)ms pulse width

Non-Operating

Tested 15g peak acceleration, 11 (+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC 68-2-6

Conductors

Wire

Size

12 gauge (4mm

2

) stranded maximum

1.2mm (3/64in) insulation maximum

Agency Certification

II 2G EEx ia IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ia IIC T4

Certificates

DMT 98 ATEX E012 U

Termination connections are unique with each I/O module. Refer to the appropriate I/O module’s
installation instructions.

C

US

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

18

19

20

21

22

23

33

24

25

26

27

28

29

30

31

32

17

35

36

37

38

47

48

49

50

34

51

16

39

40

41

42

43

44

45

46

41254

Row A
Row B
Row C

Label placed at top of wiring area

Row A

Row B

Row C

+V -V

-V

+V

No connections allowed to terminals 36 and 49

Publication 1797-2.1 - April 2000

22 7.5V dc 16 pt Non-Isolated NAMUR Input Module Cat. No. 1797-IBN16

FLEX Ex

7.5V dc 16 pt Non-Isolated NAMUR Input Module Cat. No. 1797-IBN16

Product Features

•

Module: EEx ia IIB/IIC T4, Class I Division 1
Group A-D

•

IS input type: EEx ia IIB/IIC, Class I, II, III
Division 1 Group A-G

•

16 single-ended input channels referenced to
a single common

•

Maximum no load voltage/short-circuit
current:
U/V = 7.5V dc/
I = 7.5mA

•

Yellow LED to indicate input state,
input ON = LED ON

•

Fault detection, fault bits in data table and
LED (per channel) blinking red (1Hz)

•

DIN 19234, NAMUR compatible

•

Switching points/hysteresis:
I = 1.2mA to 2.1mA/0.2mA

•

Input pulse width on/off: >500µs/>500µs

•

Lead breakage threshold: I<0.35mA

•

Lead breakage defeat on four-channel group
basis via module DIP switch selection

•

Fault detection can be disabled via data table

•

Input frequency up to 1000Hz

•

Programmable digital input filtering 1 to
33ms (OFF-ON and ON-OFF)

•

All channels updated to flexbus<500µs

•

Module field-side power consumption: 2.8W

Customer Connections

Ex

1797-IBN16

PWR

40064

+V

-V

-

+

NAMUR Prox

lead break defeat

Bus

µ

C

Flexbus

Power
Supply

Publication 1797-2.1 - April 2000

FLEX Ex

7.5V dc 16 pt Non-Isolated NAMUR Input Module Cat. No. 1797-IBN16 23

Terminal Base Assignment

Row A

Row B

Row C

+V

-V

+V

-V

41504

+

-

Ch 0

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

+

-

Ch 1

+

-

Ch 2

+

-

Ch 3

+

-

Ch 4

+

-

Ch 5

+

-

Ch 6

+

-

Ch 7

+

-

Ch 8

+

-

Ch 9

+

-

Ch 10

+

-

Ch 11

+

-

Ch 12

+

-

Ch 13

+

-

Ch 14

+

-

Ch 15

No connection allowed to terminals 36 and 49

Specifications - 1797-IBN16

Number of Inputs

16 (1 group of 16), non-isolated, sinking

IS Input Type

EEx ia IIB/IIC,
AEx ia IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

Input Type

DIN19234, NAMUR compatible

ON-State Current

2.1mA

OFF-State Current

1.2mA

Hysteresis

0.2mA

Input Frequency

1000Hz maximum

Input Pulse Width

>500

µ

s on or off

Maximum Load Voltage

U/V = 7.5V dc

Short Circuit Current

I = 7.5mA

Short Circuit Threshold

I > 6mA

Lead Breakage Threshold

I < 0.35mA

Input Delay Times

OFF to ON

1ms, 2ms, 3ms, 5ms, 9ms, 17ms, 33ms

ON to OFF

1ms default - selectable thru output image table
(see

Setting Input Filter Times

)

Indicators (field side
indication, customer device
driven)

16 yellow status indicators
16 red fault indicators
1 green module power indicator

Output (intrinsically safe)

(16 pin male and female
flexbus connector)

U

i

< 5.8V dc

I

i

< 400mA

L

i

= Negligible

C

i

= Negligible

Isolation Path

Isolation Type

Input to Power Supply

Galvanic to DIN EN50020

Input to Flexbus

Galvanic to DIN EN50020

Input to Input

None

Power Supply to Flexbus

Galvanic to DIN EN50020

Power Supply
(+V, -V intrinsically safe)

U

i

< 9.5V dc

I

i

< 1A

L

i

= Negligible

C

i

= Negligible

Module Field-Side
Power Consumption

2.8W

Power Dissipation

2.8W

Thermal Dissipation

Maximum 9.6 BTU/hr

Module Location

Cat. No. 1797-TB3 or -TB3S Terminal Base Unit

Conductor Wire Size

12 gauge (4mm

2

) stranded maximum

3/64in (1.2mm )insulation maximum

Dimensions (HxWxD)

46mm x 94mm x 75mm
(1.8in x 3.7in x 2.95in)

Weight

200g (approximate)

Keyswitch Position

6

Environmental Conditions

Operational Temperature -20 to +70

o

C (-4 to +158

o

F)

Storage Temperature

-40 to +85

o

C (-40 to +185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Nonoperating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC68-2-6

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib/[ia] IIC T4

Certificates

DMT 98 ATEX E013 X

C

US

Publication 1797-2.1 - April 2000

24 24V dc 4 pt Non-Isolated Source Output Module Cat. No. 1797-OB4D

FLEX Ex

24V dc 4 pt Non-Isolated Source Output Module Cat. No. 1797-OB4D

Product Features

•

Module: EEx ib IIB/IIC T4, Class I Division 1
Group A-D

•

IS output type: EEx ia IIB/IIC T4, Class I, II,
III Division I Group A-G

•

4 output channels referenced to a single
supply

•

Functional data: U = 12V at I = 45mA

•

Yellow LED to indicate output state,
output ON = LED ON

•

Fault indication, signal to the backplane and
LED (per channel) blinking red for fault

•

Output wire-off detection

•

Output wire-off detection on per module
basis via module data bit

•

Electronically short circuit protected, fault
reported to controller

•

All channels updated from the backplane
every 2ms

•

Output fault state programmable

Customer Connections

Ex

1797-OB4D

PWR

40067

flexbus

bus

uC

+V

-V

+

-

power
supply

valve

audible
alarm

solenoid

40069

Publication 1797-2.1 - April 2000

FLEX Ex

24V dc 4 pt Non-Isolated Source Output Module Cat. No. 1797-OB4D 25

Terminal Base Assignment

Output Voltage/Current Capability

40068

Row A

Row B

Row C

+

+

+

+

-

-

-

-

ch0

ch1

ch2

ch3

+V

+V

-V

-V

No connections allowed to terminals 2, 3, 6, 7, 10, 11, 14, 15, 17 to 32, 36, 37,
38, 39, 46, 47, 48, 49

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

Specifications - 1797-OB4D

Number of Outputs

4, non-isolated, sourcing

IS Output Type

EEx ia IIB/IIC,
AEx ia IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

V-I Characteristics

Refer to the “Output Voltage/Current Capability”
section in 1797-5.6

Load Range

30-5000

Ω

Fault Detection

Fault bits in data table and LED (per channel) blinking
red (1 Hz)

Electronic Protection

Lead break, overload, short circuit

Maximum Output
Delay Times

OFF to ON

<1.2ms

ON to OFF

<1.2ms

Indicators

4 yellow status indicators
4 red fault indicators
1 green module power indicator

Output (Intrinsically Safe)

(16 pin Male and Female
Flexbus Connector)

U

i

< 5.8V dc

I

i

< 400mA

L

i

= Negligible

C

i

< 1.35µF

Isolation Path

Isolation Type

Output to Power Supply

Galvanic to DIN EN50020

Output to Flexbus

Galvanic to DIN EN50020

Output to Output

None

Power Supply to Flexbus

Galvanic to DIN EN50020

Power Supply

(+V, -V Intrinsically Safe)

U

i

< 9.5V dc

I

i

< 1A

L

i

= Negligible

C

i

= Negligible

Module Field-Side
Power Consumption

7.5W

Power Dissipation

5W

Thermal Dissipation

17.07 BTU/hr

Module Location

Cat. No. 1797-TB3 or -TB3S Terminal Base Unit

Conductors Wire Size

12 gauge (4mm

2

) stranded maximum

1.2mm (3/64in) insulation maximum

Dimensions (HxWxD)

46mm x 94mm x 75mm
(1.8in x 3.7in x 2.95in)

Weight

200g (approximate)

Keyswitch Position

7

Environmental Conditions

Operational Temperature

-20 to +70

o

C (-4 to +158

o

F)

Storage Temperature

-40 to +85

o

C (-40 to +185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Nonoperating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC68-2-6

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib/[ia] IIC T4

Certificates

DMT 98 ATEX E 040 X

C

US

Voltage

mA

30

25

20

15

10

5

0

0

5

10

15

20

25

30

35

40

45

50

41313

Publication 1797-2.1 - April 2000

26 8 pt 16 bit Single-Ended Non-Isolated Input Module Cat. No. 1797-IE8

FLEX Ex

8 pt 16 bit Single-Ended Non-Isolated Input Module Cat. No. 1797-IE8

Product Features

•

Module: EEx ib IIB/IIC T4, Class I Division 1
Group A-D

•

IS input type: EEx ia IIB/IIC T4, Class I, II, III
Division 1 Group A-G

•

Eight single-ended input channels referenced
to a single common

•

3-wire input for 2 and 3-wire transmitters

•

Functional data: U = 15V at I = 22mA, normal
Input current = 4 to 20mA, full-current range
0 to 22mA to allow for over and underrange
indication

•

Wire-off detection, signal to the backplane
and LED (per channel) blinking red for fault

•

Wire-off detection on per channel basis via
module data bits

•

Input filter cutoff programmable

•

Response time: 4ms to 99% of final value

•

All channels updated to the backplane every
< 4ms

•

Resolution: 16 bits

•

Accuracy: 0.1%

•

Temperature drift: 50 ppm/°C

Customer Connections

Ex

PWR

1797-IE8

8 CHANNEL ANALOG INPUT

IN1

IN0

IN2

IN3

IN4

IN5

IN6

IN7

3

40070

flexbus

Bus

uC

+V

-V

+

sig

-

4-20mA
Xmit

P

I

40072

4-20mA
Xmit

P

I

286

Ω

21V

22

Ω

4-20mA
Xmit

P

I

Isolated
Power

Publication 1797-2.1 - April 2000

FLEX Ex

8 pt 16 bit Single-Ended Non-Isolated Input Module Cat. No. 1797-IE8 27

Terminal Base Assignment

Row A

Row B

Row C

+

-

+

-

+

-

+

-

Ch 7

Ch 6

Ch 5

Ch 4

+V -V

+V -V

40071

sig

sig

sig

sig

No connection
allowed

No connection
allowed

Ch 7

+

-

+

-

+

-

+

-

Ch 2

Ch 1

Ch 0

sig

sig

sig

sig

Ch 3

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

Specifications - 1797-IE8
Number of Inputs

8 single-ended, non-isolated

IS Input Type

EEx ia IIB/IIC T4,
AEx ia IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

Resolution

16 bits

Transfer Characteristics

Accuracy at 20

o

C (68

o

F)

0.1% of input signal range

Temperature Drift

0.005%/C of input signal range

Functional Data Range

>15V @22mA
>21V @ 0mA

Data Format

Configurable

Step Response to
99% of FS

4ms

Indicators

8 red fault indicators
1 green power

Output (Intrinsically Safe)

(16 pin male and female
flexbus connector)

U

i

< 5.8V dc

I

i

< 400mA

L

i

= Negligible

C

i

< 1.35µF

Isolation Path

Isolation Type

Input to Power Supply

Galvanic to DIN EN50020

Input to Flexbus

Galvanic to DIN EN50020

Input to Input

None

Power Supply to Flexbus

Galvanic to DIN EN50020

Power Supply
(+V, -V intrinsically safe)

U

i

< 9.5V dc

I

i

< 1A

L

i

= Negligible

C

i

= Negligible

Module Field-side
Power Consumption

7.5W

Power Dissipation

5.2W

Thermal Dissipation

17.75 BTU/hr

Module Location

Cat. No. 1797-TB3 or -TB3S

Conductor Wire Size

12 gauge (4mm

2

) stranded maximum

3/64in (1.2mm) insulation maximum

Dimensions (HxWxD)

46mm x 94mm x 75mm
(1.8in x 3.7in x 2.95in)

Weight

200g (approximately)

Keyswitch Position

3

Environmental Conditions

Operational Temperature

-20 to +70

o

C (-4 to +158

o

F)

Storage Temperature

-40 to +85

o

C (-40 to +185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Nonoperating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC68-2-6

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib/[ia] IIC T4

Certificates

DMT 98 ATEX E 020 X

C

US

Publication 1797-2.1 - April 2000

28 8 pt 13 bit Single-Ended Non-Isolated Output Module Cat. No. 1797-OE8

FLEX Ex

8 pt 13 bit Single-Ended Non-Isolated Output Module Cat. No. 1797-OE8

Product Features

•

Module: EEx ib IIB/IIC T4, Class I Division 1,
Group A-D

•

IS output type: EEx ia IIB/IIC T4, Class I, II,
III Division 1, Group A-G

•

Eight dual-ended output channels referenced
over sense resistors to a single common

•

Functional data:
U = 11V at I = 22mA, normal output
current = 4-20mA, full current
range = 0-22mA to allow for over and
overrange indication

•

Load 0-500

Ω

•

Output wire-off detection, LED (per channel)
blinking red for fault, threshold < 2mA

•

Output wire-off detection on per channel
basis via module data bits

•

Rise time: 4ms to 99% of final value

•

All channels updated to the backplane every
< 4ms

•

Resolution: 13 bits

•

Accuracy: 0.1%

•

Temperature drift: 100ppm/°C

•

One power supply loop for one module

•

Output fault state programmable

Customer Connections

Ex

1797-OE8

PWR

40073

flexbus

Bus

uC

+V

-V

+

-

power
supply

4-20mA
actuator

4-20mA
valve

41441

I

F

Publication 1797-2.1 - April 2000

FLEX Ex

8 pt 13 bit Single-Ended Non-Isolated Output Module Cat. No. 1797-OE8 29

Terminal Base Assignment

41440

Row A

Row B

Row C

ch0

ch1

ch2

ch3

+V

+V

-V

-V

+

+

+

+

-

-

-

-

ch4

ch5

ch6

ch7

+

-

+

-

+

-

+

-

No connections allowed to terminals 2, 3, 6, 7, 10, 11, 14, 15, 19, 20, 23,
24, 27, 28, 31, 32, 36, 37, 38, 39, 46, 47, 48, 49

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

Specifications - 1797-OE8
Number of Outputs

8 single-ended, non-isolated

IS Output Type

EEx ia IIB/IIC T4,
Aex ia IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

Resolution

13 bit

Transfer Characteristics

Accuracy at 20

o

C (68

o

F)

0.1% of output signal range

Temperature Drift

0.010%/C of output signal range

Load Range

Current

0-22mA

Voltage Available at 22mA >11V
Load

0-500

Ω

@ 22mA

Data Format

Configurable

Step Response to 99% of
FS

4ms

Indicators

8 red fault indicators
1 green power

Output (Intrinsically Safe)

(16 pin male and female
flexbus connector)

U

i

< 5.8V dc

I

i

< 400mA

L

i

= Negligible

C

i

= < 1.35

µ

F

Isolation Path

Isolation Type

Output to Power Supply

Galvanic to DIN EN50020

Output to Flexbus

Galvanic to DIN EN50020

Output to Output

None

Power Supply to Flexbus

Galvanic to DIN EN50020

Power Supply

(+V, -V Intrinsically Safe)

U

i

< 9.5V dc

I

i

< 1A

L

i

= Negligible

C

i

= Negligible

Module Field-Side
Power Consumption

6.3W

Power Dissipation

5.4W

Thermal Dissipation

18.4 BTU/hr

Module Location

Cat. No. 1797-TB3 or -TB3S Terminal Base Unit

Conductors Wire Size

12 gauge (4mm

2

) stranded maximum

1.2mm (3/64in) insulation maximum

Dimensions (HxWxD)

46mm x 94mm x 75mm
(1.8in x 3.7in x 2.95in)

Weight

200g (approximately)

Keyswitch Position

4

Environmental Conditions

Operational Temperature

-20 to +70

o

C (-4 to +158

o

F)

Storage Temperature

-40 to +85

o

C (-40 to +185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Nonoperating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC68-2-6

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib/[ia] IIC T4

Certificates

DMT 98 ATEX E 051X

C

US

Publication 1797-2.1 - April 2000

30 8 pt 16 bit Non-Isolated RTD Thermocouple/mV Input Module Cat. No. 1797-IRT8

FLEX Ex

8 pt 16 bit Non-Isolated RTD Thermocouple/mV Input Module Cat. No. 1797-IRT8

Product Features

•

Module: EEx ib IIB/IIC T4, Class I Division 1
Group A-D

•

IS input type: EEx ia IIB/IIC T4, Class I, II, III
Division 1 Group A-G

•

Input channels referenced to a single
common

•

Resolution: 16 bits

•

RTD mode

² 2-, 3- and 4-wire connection

² sensor lead breakage detection all 4 leads

² sensor short circuit detection all 4 leads

² measuring resistance 0 to 500

Ω

² accuracy: 0.1% of span @ 20

o

C,

filter cutoff < 1Hz

•

Thermocouple mode

² types B, E, J, K, TXK/XK (L), N, R, S, T

² cold junction compensation (CJC)

² external reference junction

(programmable)

² sensor breakage detection

² accuracy: 0.1% of span, filter cutoff < 1 Hz

² accuracy of CJC: +1°C/K

•

mV mode

² input voltage -40 to 100 mV differential

sensing

² sensor breakage detection

² accuracy: 0.1% of span @ 20

o

C,

filter cutoff < 1Hz

Customer Connections

Ex

1797-IRT8

PWR

40076

flexbus

Bus

uC

+V

-V

+

H

L

-

power
supply

thermocouple

mV

+

-

2W RTD

3W RTD

4W RTD

41658

+

-

CJC

CJC

Publication 1797-2.1 - April 2000

FLEX Ex

8 pt 16 bit Non-Isolated RTD Thermocouple/mV Input Module Cat. No. 1797-IRT8 31

Terminal Base Assignment

Row A

Row B

Row C

Ch 7

Ch 6

Ch 5

Ch 4

+V

CJC

-V

41505

Ch 7

+

L

Ch 2

Ch 1

Ch 0

Ch 3

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

H

-

+

L

H

-

+

L

H

-

+

L

H

-

+

L

H

-

+

L

H

-

+

L

H

-

+

L

H

-

-V

CJC

chassis
GND for
shield

chassis
GND for
shield

0+

0-

1-

1+

No connection allowed to terminals 36 and 49

+V

Specifications - 1797-IRT8
Number of Inputs

8 channels

IS Input Type

EEx ia IIB/IIC T4,
AEx ia IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

Resolution

16 bits

Input Type

Suitable for Pt 100, Pt200, Ni 100, Ni120, Ni200, 10Cu
RTD, thermocouple Type B, E, J, K, N, R, S,
T, TXK/XK (L)
Configuration via internal bus

Signal Input Range

0 to 500

Ω

; -40 to 100mV

Settling Time to 99%
of Final Value

8ms (mV mode,

o

F thermocouple)

Open RTD Detection

Out of range upscale reading

Lead Resistance
Compensation

< 15

Ω

total

Transfer Characteristics

Accuracy

RTDs: 0.1% of span @ 20

o

C, filter cutoff < 1Hz

Thermocouples: 0.1% of span @ 20

o

C,

filter cutoff < 1Hz

Temperature Effect

Cold junction compensation = +1

o

C

150ppm/

o

C (primary range)

Indicators

8 red fault indicators
1 green module power indicator

Data Organization
Overrange Alarm

Lead Breakage Alarm

Individually for each channel

Fault State

Individually for each channel

Sensor Mode RTD 2,

3, or 4-wire,

Individually for each channel (includes overrange, lead
breakage and short circuit)

TC Sensor Type (e.g. TC,

Type B, E, J..., RTD or mV

Common to groups of 4 channels (ch 0-3, ch 4-7)

Internal Reference

Junction (TC mode)

Common to groups of 4 channels (ch 0-3, ch 4-7)

Common to all channels (0

o

C, 20

o

C, 25

o

C, 30

o

C, 40

o

C,

50

o

C, 60

o

C, 70

o

C selectable

Output (intrinsically safe)
(16 position male/female
flexbus connector)

U

i

< 5.8V

I

i

< 400mA

Li = Negligible
Ci < 1.35

µ

F

Isolation Path

Isolation Type

Input to Power Supply

Galvanic to DIN EN50020

Input to Flexbus

Galvanic to DIN EN50020

Input to Input

None

Power Supply to Flexbus

Galvanic to DIN EN50020

Power Supply
(+V, -V intrinsically safe)

U

i

< 9.5V dc

I

i

< 1A

L

i

= Negligible

C

i

= Negligible

Module Field-Side
Power Consumption

1.6W

Power Dissipation

1.6W

Thermal Dissipation

Maximum 5.46BTU/hr

Module Location

Cat. No. 1797-TB3 or -TB3S Terminal Base Unit

Conductor Wire Size

12 gauge (4mm

2

) stranded maximum

3/64in (1.2mm) insulation maximum

Dimensions (HxWxD)

46mm x 94mm x 75mm
(1.8in x 3.7in x 2.95in)

Weight

200g (approximate)

Keyswitch Position

2

Environmental Conditions

Operational Temperature

-20 to +70

o

C (-4 to +158

o

F)

Storage Temperature

-40 to +85

o

C (-40 to +185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Nonoperating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC68-2-6

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib/[ia] IIC T4

Certificates

DMT 98 ATEX E 023 X

C

US

Publication 1797-2.1 - April 2000

32 2 Input Frequency Module Cat. No. 1797-IJ2

FLEX Ex

2 Input Frequency Module Cat. No. 1797-IJ2

Product Features

•

Module: EEx ib IIB/IIC T4, Class I Division 1
Group A-D

•

IS input type: EEx ia IIB/IIC T4, Class I, II, III
Division 1 Group A-G

•

Software configurable frequency operating
mode, with independent selections per
frequency input

•

Frequency inputs, two gate inputs and two
outputs

•

Functional data: four selectable ranges,
50mV, 500mV (magnetic pickup), Flowmeter
and NAMUR

•

Provides IS power to drive up to two NAMUR
and two Flowmeter frequency inputs and/or
contact switches and NAMUR gate inputs

•

NAMUR lead breakage indication for any
lead, signal to the backplane and LED (per
channel) blinking red for fault

•

NAMUR lead breakage defeat on per channel
basis via module data table (NAMUR inputs
only)

•

Frequency count range up to 32k Hz

•

Calculate frequency on time interval or input
count

•

Programmable scaling

•

Acceleration value calculated

•

Maximum frequency or acceleration alarms

•

All channels updated to the backplane every
< 4 ms (according to sampling time)

Ex

1797-IJ2

PWR

40079

Publication 1797-2.1 - April 2000

FLEX Ex

2 Input Frequency Module Cat. No. 1797-IJ2 33

Customer Connections

Terminal Base Assignment

41302

flexbus

Bus

uC

+V

-V

+V

power
supply

6V

3V

+8V

N

500/50mV

50mV select

GND

+8V

N

500/50mV

50mV select

GND

R NO

R Com

R NC

valve

audible
alarm

solenoid

magnetic
sensor

magnetic
sensor

jumper for 50mV sensor
none for 500mV

jumper for 50mV sensor
none for 500mV

NAMUR
prox

NAMUR
prox

vortex
sensor

Row A

Row B

Row C

+V

-V

41506

3V

V+

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

6V

GND 50

mV

Sel

N

500/50

mV

8V

8V N

GND

6V

V+

3V

R0 NO R0 NC

-V

No connection allowed to terminals 19, 30, 36, 38, 39, 47, 48, 49

+V

R0 COM

R1 COM

50

mV

Sel

500/50

mV

Channel 0 Frequency Input

Channel 1 Frequency Input

GND

GND 50

mV

Sel

N

500/50

mV

8V

8V N

50

mV

Sel

500/50

mV

GND

R1 NO R1 NC

Channel 0 Gate Input

Channel 1 Gate Input

Publication 1797-2.1 - April 2000

34 2 Input Frequency Module Cat. No. 1797-IJ2

FLEX Ex

Specifications - 1797-IJ2
Number of Inputs

2 frequency channels
2 gate channels

IS Input Type

EEx ia IIB/IIC T4,
AEx ia IIC T4,
Class I, II, III Division 1 & 2 Groups A-G T4

IS Module Type

EEx ib IIB/IIC T4,
AEx ib IIC T4,
Class I Division 1 & 2 Groups A-D T4

Input (intrinsically safe) to
DIN19234 (NAMUR)

No Load Voltage Short
Circuit Current

8V dc/8mA

Switching

Point/Switching Hysteresis

1.2-2.1mA/0.2mA

Input Pulse
Length/Pulse Pause

>20

µ

s/>20

µ

s

Lead breakage monitoring Breakage current <0.35mA

Inputs to Flowmeter

Input signal
Voltage available at 20mA

Threshold 3V or 6V selectable
>15V

Inputs to Magnetic pickup
input signal

50mV or 500mV selectable

Processing time

<

4ms

Input Frequency

1.0Hz - 32,767Hz

Resolution and accuracy

Minimum Frequency

Resolution

Sampling Time (ms)

Accuracy %

2

0.043

4

0.033

5

0.031

10

0.027

20

0.025

50

0.023

100

0.023

200

0.023

500

0.023

1000

0.023

Frequency Input
Characteristics

Magnetic pickup: 50mV, 500mV
NAMUR: 8V, 8mA
Flowmeter: low <3V, high >6V

Frequency Input
Impedance Rating

>5k

Ω

magnetic pickup

>10K

Ω

flowmeter

Outputs

2 relay outputs

Output Switching Time

<10ms

Gate Inputs

2

1797-IJ2 specifications continued.
Indicators

6 yellow status indicators
4 red fault indicators
1 green module power indicator

Output (intrinsically safe)
(16 pin male and female
flexbus connector)

U

o

< 5.8V

I

o

< 400mA

L

i

< Negligible

C

i

< 2.64

µ

F

Isolation Path

Isolation Type

Input to Power Supply

Galvanic to DIN EN50020

Input to Flexbus

Galvanic to DIN EN50020

Input to Input

None

Output to Power Supply

Galvanic to DIN EN50020

Output to Flexbus

Galvanic to DIN EN50020

Output to Output

Galvanic to DIN EN50020

Power Supply
(+V, -V intrinsically safe)

U

i

< 9.5V dc

I

i

< 1A

L

i

= Negligible

C

i

= Negligible

Module Field-Side
Power Consumption

4.25W

Power Dissipation

4.25W

Thermal Dissipation

Maximum 14.5BTU/hr

Module Location

Cat. No. 1797-TB3 or -TB3S Terminal Base Unit

Conductor Wire Size

12 gauge (4mm

2

) stranded maximum

3/64in (1.2mm) insulation maximum

Dimensions (HxWxD)

46mm x 94mm x 75mm
(1.8in x 3.7in x 2.95in)

Weight

200g (approximate)

Keyswitch Position

1

Environmental Conditions

Operational Temperature

-20 to +70

o

C (-4 to +158

o

F)

Storage Temperature

-40 to +85

o

C (-40 to +185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Nonoperating

Tested to 15g peak acceleration, 11(+1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC68-2-6

Agency Certification

II (1) 2G EEx ia/ib IIB/IIC T4
Class I Division 1 & 2 Groups A-D T4
Class I Zone 1 & 2 AEx ib/[ia] IIC T4

Certificates

DMT 98 ATEX 033 X

C

US

Publication 1797-2.1 - April 2000

FLEX Ex

FLEX Ex Power Supplies Cat. Nos. 1797-PS2N, and -PS2E 35

FLEX Ex Power Supplies Cat. Nos. 1797-PS2N, and -PS2E

The 1797-PS2N is a 24V dc in/quad-Ex dc out
power supply in an explosion-proof enclosure with
1 inch conduit pipe-thread input/output
terminations.

The 1797-PS2E is a 24V dc in/quad-Ex dc out
power supply in a flame-proof enclosure with
increased safety input/output terminations. The
24V dc glan is an M20 x 1,5 and can accept a cable
from 6mm to 12mm in diameter. The Ex outputs
are M16 x 1,5 and can accept a cable from 4mm to
8mm in diameter.

Product Features

•

Module: Class I Division 1 Group C-D, T4/
Class I Division 2 Groups A-D, T4
(“N” versions)

•

Explosion-proof enclosure, IP 66, NEMA
4/4X, conduit input terminations (“N”
versions)

•

Maximum conduit length of 10 inches

•

Module: EEx de [ib] IIC T4 (“E” versions)

•

Explosion-proof enclosure, IP 65, NEMA
12/12K/13, increased safety input
terminations (“E” versions)

•

24V dc supply source

•

Four channels, 8.5W output each channel

•

Dual power feeds for source input
redundancy

•

Outputs are IS galvanically isolated from the
source

•

All channels are independently IS limited

Customer Connections

40468

30686

1797-PS2N

1797-PS2E

Vin1

Vin2

chassis GND

IS Isolation
Hazardous to IS

-V

+V

Out 1

-V
+V

Out 2

-V
+V

Out 3

41315

Dual Input
Diodes

IS Limiters
Voltage and Current

-V

+V

Out 4

+

-

+

-

dc

Type of Power Input

IS Power Output

Publication 1797-2.1 - April 2000

36 FLEX Ex Power Supplies Cat. Nos. 1797-PS2N, and -PS2E

FLEX Ex

Understanding System Planning

Part of system planning is determining what
modules are needed for the application, how many
power supplies are needed, how to best partition
the system, and where to locate the system
cabinets.

A key task in the development cycle is determining
the number of power supply outputs (thus power
supplies) you will need. For example, you will
need eleven power outputs if you are using the
fiber hub, which requires 8.5W:

Each power supply has four independent IS power
outputs capable of 8.5W each. In this example, we
required eleven IS power outputs so three power
supplies were sufficient.

The total number of power supplies needed
depends on the modules used and the total system
configuration. The following illustration shows
how this example may be configured.

Modules

Requires

Fiber Hub

8.5W

Two ControlNet Adapters

8.5W each

Two Analog Inputs

7.5W each

Two Analog Outputs

6.3W each

Two Thermocouple Inputs

1.6W each

Two Digital Outputs

7.5W each

Three NAMUR Digital Inputs

2.8W each

Two Counter Inputs

4.25W each

IS Pwr

Safe Area

Hazardous Area

1797 power supply

1797 power supply

1797 power supply

ACNR

Spare

IE8

OE8

IRT8

Spare

Spare

IJ2

IJ2

ACNR

OB4D

OB4D

IBN16

IBN16

IBN16

IE8

IRT8

OE8

RPA

RPFM

RPFM

IS 1797 I/O

IS 1797 I/O

IS 1797 Fiber Hub

IS Pwr
IS Pwr
IS Pwr

IS Pwr
IS Pwr
IS Pwr
IS Pwr

IS Pwr
IS Pwr
IS Pwr
IS Pwr

EEx d
/e

EEx ib

EEx d
/e

EEx ib

EEx d
/e

EEx ib

41306

Unsafe
Power
Entrance

Spare

Publication 1797-2.1 - April 2000

FLEX Ex

FLEX Ex Power Supplies Cat. Nos. 1797-PS2N, and -PS2E 37

Optimize Power Distribution

Your FLEX Ex system must use adequate power
supplies to support the physical locations
determined earlier in this chapter. Each FLEX Ex
I/O module in the system is rated for input power,
and the FLEX Ex power supply is rated in the
number of output channels and power available
from each channel.

Assigning Power Supplies

Note the amount of power each module requires
and assign it to a power supply output. Continue
to assign modules to the power supply output until
the supply’s output power rating is consumed. The
graphic on the next page shows the number of
modules per power supply output.

,03257$17

Each power supply output in the FLEX Ex system is rated
for 8.5W. Modules can be attached to the output until their
combined power equals that number. Do not exceed the
power supply maximum of 8.5W.

Modules

0

5

3

2

1

4

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

IRT8

1.6W

41661

IBN16

2.8W

IBN16

2.8W

IBN16

2.8W

IBN16

2.8W

IBN16

2.8W

IBN16

2.8W

IBN16

2.8W

IJ2

4.25W

IJ2

4.25W

IJ2

4.25W

IJ2

4.25W

OE8

6.3W

IE8

7.5W

ACNR

8.5W

RPFM

(In RPA)

RPFM

(In RPA)

RPA

8.5W

Modules Per Power Supply Output

Publication 1797-2.1 - April 2000

38 FLEX Ex Power Supplies Cat. Nos. 1797-PS2N, and -PS2E

FLEX Ex

Hazardous Area Installation

The following illustration provides an example of
how power supplies are arranged within the FLEX
Ex system.

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

1

.

.

1

.

.

.

.

42304

Programmable
Logic Controller

1786-RPA

Optional

1786-RPFM

Fiber Cable

Non-Hazardous Location

User Supplied

24V Supply

(85 to 264V ac future)

1797-PS2N

or

(1797-PS2E)

Adapter

Module

Adapter

Module

1797-RPA 1797-RPFM

Optional

1797-RPFM

Hazardous Location

Class I, Division 1

or

(Zone 1)

Hardened Conduit

Hardened Conduit

Hardened Conduit

1786-RPFM

to other devices

to other hazardous devices

1797-PS2N

or

(1797-PS2E)

1797-PS2N

or

(1797-PS2E)

Publication 1797-2.1 - April 2000

FLEX Ex

FLEX Ex Power Supplies Cat. Nos. 1797-PS2N, and -PS2E 39

Terminal Base Assignment

1797-PS2N

41256

+V

-V

+V -V

+V -V

+V -V

-

+

cha
GND

-

+

Out 1

Out 2

Out 3

Out 4

Vin2

Vin1

1

2

3

4

5

10

11 12 13

14 15

16 17

North America DC Power Input

IS Power Output

1797-PS2E

41271

10

11 12 13

14 15 16 17

1

2

4

5

3

cha
GND

-

+

Vin1

-

+

Vin2

+V -V

+V -V

+V -V

+V -V

Out 1

Out 2

Out 3

Out 4

Vin1

Publication 1797-2.1 - April 2000

40 FLEX Ex Power Supplies Cat. Nos. 1797-PS2N, and -PS2E

FLEX Ex

Specifications

1797-PS2N

1797-PS2E

IS Module Type

Class I, Division 1 Groups C-D T4

Class I Division 2 Groups A-D T4

EEx de [ib] IIC T4

IS Output Type

EEx ib IIC,

Class I, II, III Division 1 & 2 Groups A-G

Input Connectors

24V dc

Terminals 1, 2, 4, 5

Voltage Range

19 to 32V

Ripple

5% ac

Input Power Entrance

1” NPT, <6” conduit allowed between power supply

and seal

Increased safety

Output Connectors

Terminals 10-17

Output Power

4x8.5W

Voltage U

O

<9.5V

Current I

O

<1A

C

o

(IIC)

<800 nF

L

o

(IIC)

<10

µ

H - Typical cable length 3.5m

Maximum Output Cable Resistance
(both directions)

<0.1

Ω

Isolation Path

Input Power to Output Power

Galvanic to DIN EN50020

Output to Output

None

Input Power

55W

Power Dissipation

21W

Thermal Dissipation

71.67 BTU/hr

Conductors Wire Size

12 gauge (4mm

2

) stranded maximum

1.2mm (3/64in) insulation maximum

Use wire rated for 100

o

C operation

Dimensions (HxWxD)

174mm x 174mm x 128mm

(6.9in x 6.9in x 5.04in)

174mm x 174mm x 280mm

(6.9in x 6.9in x 11.0in)

Protections Class

IP66/NEMA 7B

IP 65/NEMA 7B

Weight (approximately)

7.3kg (16lbs)

7.7kg (17lbs)

Environmental Conditions

Operational Temperature

-20 to 70

o

C (-4 to 158

o

F)

Storage Temperature

-40 to 85

o

C (-40 to 185

o

F)

Relative Humidity

5 to 95% noncondensing

Shock

Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Non-Operating

Tested 15g peak acceleration, 11 (±1)ms pulse width

Vibration

Tested 2g @ 10-500Hz per IEC 68-2-6

Agency Certification

Class I, Division 1 Groups C-D T4

Class I Division 2 Groups A-D T4

EEx de [ib] IIC T4

Certificates

BVS 98.D.2055X

C

US

Publication 1797-2.1 - April 2000

FLEX Ex

FLEX Ex Accessories Cat. Nos. 1797-BOOT, -INS, and -EXMK 41

FLEX Ex Accessories Cat. Nos. 1797-BOOT, -INS, and -EXMK

Use the ControlNet BNC boot, trunk insulator, and marking kit in your
cable connections.

The

%227 covers the BNC connector on the ControlNet Ex

trunk cable.

The

,16 is a bag of assorted insulators that you can use to

replace those shipped with the product. The

(;0. is a marking

kit for FLEX Ex cable.

trunk terminator with
intrinsically safe insulator

trunk terminator with
intrinsically safe insulator

tap

tap

tap

trunk-cable section

trunk-cable section

IS

insulators

30094

Cable #A38

30597-M

Tab can be marked with
cable system identification
(example shown).

Publication 1797-2.1 - April 2000

42 Extender Cables Cat. Nos. 1794-CE1 and -CE3

FLEX Ex

Extender Cables Cat. Nos. 1794-CE1 and -CE3

Extender Cables

Use the optional 1794-CE1 (0.3m, 1ft) or 1794-CE3 (0.9m, 3ft) extender
cable (one per system) to arrange your FLEX Ex system into two rows
or split your system into horizontal and vertical orientation.

20129-M

1794-CE1
or
1794-CE3
Extender
Cable

.

.

.

.

.

.

.

.

.

.

.

.

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

40089

FLEX I/O

1797-BIC

1794-CE3

FLEX Ex

Bus Isolator

1797-CEC

Publication 1797-2.1 - April 2000

FLEX Ex

43

Products Under Development

Intermixed Systems

The bus isolator modules, 1797-BIC and -CEC, allow you to
configure FLEX Ex modules and FLEX I/O modules on the DIN rail
when attached to the same adapter and grouped together on
appropriate sides of the bus isolator module. This highly flexible,
cost-effective solution combines intrinsically safe and
non-intrinsically safe systems.

Intermixed systems can be configured for use in the:

•

safe area much like traditional IS and I/O systems

•

hazardous and safe control equipment where the distance of
physical separation is short

•

FLEX Ex I/O with communication adapters that are not
intrinsically safe

.

.

.

.

.

.

.

.

.

.

.

.

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

any communication
adapter supported by
FLEX I/O

FLEX I/O

Nonhazardous Area

or

Class I Division 2,

Groups A-D

1797-BIC

1794-CE3

40087

FLEX Ex

Mixing Systems in
the Safe Area

Bus Isolator

1797-CEC

Hazardous Area

Zone 1

Class I Division 1,

Groups A-D

Field Wiring to

Zone 0

Class I, II, III Division 1,

Groups A-G

Maximum of 1m

.

.

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

Mixing Systems in
the Hazardous Area

any communication
adapter supported by
FLEX I/O

Nonhazardous

Area

1797-BIC

1797-CE1S

40088

FLEX Ex

1797-CEC

Field Wiring to

Zone 0

Class I, II, III Division 1,

Groups A-G

Hazardous Area

Zone 1

Class I Division 1,

Groups A-D

1797-CEFTE or -CEFTN

1794-CE3

conduit

Max of 1m

The 1797-BIC and -CEC
modules are still under
development.

Publication 1797-2.1 - April 2000

44 Bus Isolator Module and Flexbus Connector Cat. Nos. 1797-BIC and -CEC/Under Development

FLEX Ex

Products Under Development

Bus Isolator Module and Flexbus Connector Cat. Nos. 1797-BIC and -CEC/Under Development

Product Features

•

Provides an IS-compatible mechanism to
separate two sections of the backplane
allowing IS and non-IS field-device wiring to
the same I/O group

•

Converts hazardous power to IS-safe power
to run one side of the bus
receiver/transmitter circuitry and IS-safe
power to slave side modules

•

Module: [EEx ib] IIB/IIC T4, Class I Division 1
Group A-D

•

Up to 8 FLEX Ex modules may be attached to
the slave side

Customer Connections

1

3

2

4

+V

+V

-V

-V

PWR

FLEXBUS

ISOLATOR

1797-BIC

FLEXBUS

CONNECTOR

1797-CEC

40082

Master Side

Slave Side

Specifications - 1797-BIC (Estimated)
I/O Module Capacity

8 FLEX Ex modules

Indicators

Power green

Isolation Path

Flexbus to Flexbus
Flexbus Master Side

to Power Supply

Flexbus Slave Side

to Power Supply

Galvanic to DIN EN50020
Galvanic to DIN EN50020

Galvanic to DIN EN50020

Power Consumption

24V dc @ 0.25A

Power Dissipation

6W

Thermal Dissipation

20.5 BTU/hr

IS Module Type

[EEx ib] IIB/IIC T4, Class I Division 1 Group A-D

1797-CEC

1797-BIC

flexbus

flexbus

flexbus

flexbus

PWR
limit

Bus

Bus

+V

-V

power
supply

41693

Publication 1797-2.1 - April 2000

FLEX Ex

Extender Cables and Flexbus Feed Throughs Cat. Nos. 1797-CE1S, - CE3S, -CEFTN, and -CEFTE/Under Development 45

Products Under Development

Extender Cables and Flexbus Feed Throughs Cat. Nos. 1797-CE1S, - CE3S, -CEFTN, and -CEFTE/Under
Development

Use the optional Bus Isolator 1797-CE1S (0.3m, 1ft) or 1797-CE3S
(0.9m, 3ft) extender cable to mix systems in the hazardous area.

Flexbus Feed Throughs

.

.

1

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

.

any communication
adapter supported by
FLEX I/O

Nonhazardous

Area

1797-BIC

1797-CE1S

40088

FLEX Ex

1797-CEC

Field Wiring to

Zone 0

Class I, II, III Division 1,

Groups A-G

Hazardous Area

Zone 1

Class I Division 1,

Groups A-D

1797-CEFTE or -CEFTN

1794-CE3

conduit

The 1797-BIC and -CEC
modules are still under
development.

Max of 1m

1797-CEFTN or -CEFTE

41680

Publication 1797-2.1 - April 2000

46 Support Services

FLEX Ex

Support Services

Support Services

At Allen-Bradley, customer service means experienced
representatives at Customer Support Centers in key cities throughout
the world for sales service and support. Our value-added services
include:

Technical Support

•

SupportPlus programs

•

Telephone support and 24-hour emergency hotline

•

Software and documentation updates

•

Technical subscription services

Engineering and Field Services

•

Application engineering assistance

•

Integration and start-up assistance

•

Field service

•

Maintenance support

Technical Training

•

Lecture and lab courses

•

Self-paced computer and video-based training

•

Job aids and workstations

•

Training needs analysis

Repair and Exchange Services

•

Your only “authorized” source

•

Current revisions and enhancements

•

Worldwide exchange inventory

•

Local support

Publication 1797-2.1 - April 2000

FLEX Ex

47

Notes:

Publication 1797-2.1 - April 2000

Supersedes Publication 1797-2.1 - March 1999

Copyright 2000 of Rockwell International Corporation. Printed in the U.S.A.

The following are trademarks of Rockwell Automation: FLEX Ex, FLEX I/O, ControlNet Ex, PLC-5/20C, PLC-5/40C, SLC 500, and ProcessLogix.

DeviceNet is a trademark of Open DeviceNet Vendor Association (O.D.V.A.).

ControlNet is a trademark of ControlNet International.