4

Safe Timer Relays

Limited Inch
PZW

Pulse-on timer relay in accordance
VDE 0113-1, 11/98, EN 60204-1,
12/97, EN 1088, 12/97 and
IEC 204-1, 11/98.

Features

● Self-monitoring time circuits

● Monitoring the inching circuit for

limited movements

Approvals

Technical Details

PZW

Electrica Data

Supply Voltage

AC: 110, 120, 230 V

DC: 24 VDC

Tolerance

85 ... 110 %

Residual Ripple DC

10 %

Power Consumption

Approx. 4.5 VA/3 W

Voltage and Current at Y1-Y2

24 VDC, 50 mA

Utilization category in accordance with

EN 60947-4-1, 01/00

AC1:

240 V/0.01 ... 6 A/1500 VA

DC1: 24 V/0.01 ... 6 A/150 W

EN 60947-5-1, 08/00 (DC13: 6 cycles/min.) AC15: 230 V/4 A; DC13: 24 V/3A

Output Contacts

1 safety contact (N/O),

2 auxiliary contacts (N/C)

Contact Fuse Protection

6 A quick or 4 A slow

(EN 60947-5-1, 08/00)

Times

Delay-on Energisation

AC: Approx. 100 ms

DC: Approx. 50 ms

Delay-on De-energisation

Approx. 50 ms

Recovery Time

Approx. 80 ms

Time Values

PZW 3 s

0,05/0,1/0,2/0,3/0,4/0,5/0,7/1,0/1,5/2,0/

2,5/3 s

PZW 30 s

0,5/1/2/3/4/5/7/10/15/20/25/30 s

Setting Accuracy

PZW 3 s

PZW 30 s

Start of range

0,05 s ±4 %

0,5 s ±4 %

End of range

3,0 s ±2 %

30 s ±2 %

Time Accuracy

1 % voltage change

±0.06 %

1 °C temperature change

±0.1 %

Repetition Accuracy

±1 %

Mechanical Data

Maximum Cross Section of

1 x 2.5 mm

2

or 2 x 1.5 mm

2

External Conductors

Single-core or multi-core with

crimp connectors

Dimensions (H x W x D)

87 x 45 x 121 mm

Weight

AC: 350 g, DC: 260 g

Description

● 45 mm, P-97-housing, DIN-Rail

mounting

● Positive-guided relay outputs:

– 1 safety contact (N/O)
– 2 auxiliary contacts (N/C)

● LEDs for power and out

● 12 pulse options, set via

rotary switch

● Increase in the number of

safety contacts available by
connecting expander modules.

Function Description

The PZW provides pulsed cycles
within a safety circuit. It can be
activated by applying the operating
voltage.
The PZW is designed for use with:
● PNOZ safety relays

● PST safety gate monitors

● P2HZ two-hand relays.

PZW

●

●

●

NSG-D-2-085-02/04

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

Telephone [phone], Telefax [phone], E-Mail: [e-mail]

4-2

4

~

=

G1

Input circuit

A2

(L-)

A1

(L+)

U

B

Y2

Y1

18

26

K2

K1

17

25

K2

K1

36

35

Feedback

control loop

S1

Safety

contact

Auxiliary
contacts

Time
circuit 1

Time
circuit 2

Control logic

Self-test

Control logic

t

W

12

1

2

11

...

t

W

12

1

2

11

...

Safe Timer Relays

Limited Inch
PZW

Internal Wiring Diagram

Function Diagram

(1)

t

w

0

1

0

1

0

1

(3)

Input circuit (UB)

Output

Feedback control

loop

(2)

(4)

t

w

t

w

= Undefined time period

(1) = Normal operating cycle
(2) = Fault condition: input circuit

opened too early

(3) = Fault condition: feedback control

loop closed too late within t

w

(4) = Fault condition: feedback

control loop closed too late
after the time t

w

t

w

= Inching time

NSG-D-2-085-02/04

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

Telephone [phone], Telefax [phone], E-Mail: [e-mail]

4

1L1

(1L+)

1L2

(1L-)

S1

S2

PZW

S4

S5

A1 13 23 S11 S12

14 24 S23 S24 A2

PST 1

K1

K2

K1 K2

X1 X2

K2

K1

S3

K1

K2

17 25 35 Y1 Y2

A1

26 36

A2

18

Connection Example

The safety gate monitor PST 1 and
the safety limit switches S4 and S5
monitor safety gates, prohibiting
entry to dangerous machine parts.
The safe pulse action (jog-mode)
provided by the PZW means
movement is limited while the safety
gates are open, i.e. for maintenance
purposes.

Safe Timer Relays

Limited Inch
PZW

S1:

E-STOP button

S2:

Switchover key, normal
jog-mode

S3:

Enable key

S4/5:

Safety gate switch

Switch operated

Gate open

Gate closed

NSG-D-2-085-02/04

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

Telephone [phone], Telefax [phone], E-Mail: [e-mail]

4-4

4

Safe Timer Relays

Limited Inch
PZW

General Technical Data

Unless stated otherwise in the technical details for the specific unit

Electrical Data

Frequency Range AC

50 ... 60 Hz

Residual Ripple DC

160 %

Contact Material

AgSnO

2

Continuous Duty

100 %

Environmental Data

EMC

EN 50081-1, 01/92, EN 61000-6-2, 03/00

Vibration in accordance with

Frequency: 10 ... 55 Hz,

EN 60068-2-6, 01/00

Amplitude: 0.35 mm

Climatic Suitability

DIN IEC 60068-2-3, 12/86

Airgap Creepage

DIN VDE 0110 part 1, 04/97

Ambient Temperature

-10 ... +55 °C

Storage Temperature

-40 ... +85 °C

Mechanical Data

Torque Setting on Connection Terminals

0.6 Nm (screws)

Mounting Position

Any

Housing Material

Thermoplast Noryl SE 100

Protection

Mounting: IP 54

Housing: IP 40

Terminal Range: IP 20

The units were tested in accordance with the relevant standards current at
the time of development.

Order References

Type

t

U

B

Order No.

PZW

3 s

24 V DC

774 042

PZW

3 s

110 ... 120 V AC

774 044

PZW

3 s

230 V AC

774 048

PZW

30 s

24 V DC

774 019

PZW

30 s

120 V AC

774 015

PZW

30 s

230 V AC

774 017

NSG-D-2-085-02/04

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

Telephone [phone], Telefax [phone], E-Mail: [e-mail]