Measuring and Communication Module
NZM-XMC

05/10 MN01219001Z-EN

replaces 07/09 AWB1230-1630en

User Manual

All brand and product names are trademarks or registered
trademarks of the owner concerned.

Emergency On Call Service
Please call your local representative:

http://www.moeller.net/address

or
Hotline of the After Sales Service:
+49 (0) 180 5 223822 (de, en)

AfterSalesEGBonn@eaton.com

published 2009, edition date 07/09

edition 05/2010

See revision protocol in the “About this manual“ chapter.

Author:

Rainer Menden

Editor:

René Wiegand, Heidrun Riege

Translator:

globaldocs GmbH

No part of this manual may be reproduced in any form
(printed, photocopy, microfilm or any other process) or
processed, duplicated or distributed by means of electronic
systems without written permission of Eaton Industries
GmbH, Bonn.

Subject to alteration without notice.

Caution!
The manual AWB1230-1630en is renamed from edition
05/10 in MN01219001Z-EN.

Rückenbreite festlegen! (1 Blatt = 0,106 mm, gilt nur für XBS)

(1 Blatt = 0,080 mm für Eberwein Digitaldruck bei 80 g/m

)

Before commencing the installation

• Disconnect the power supply of the device.

• Ensure that devices cannot be accidentally

restarted.

• Verify isolation from the supply.

• Earth and short circuit.

• Cover or enclose neighbouring units that

are live.

• Follow the engineering instructions (AWA)

of the device concerned.

• Only suitably qualified personnel in

accordance with EN 50110-1/-2
(VDE 0105 Part 100) may work on this
device/system.

• Before installation and before touching

the device ensure that you are free of
electrostatic charge.

• The functional earth (FE) must be

connected to the protective earth (PE) or
to the potential equalisation. The system
installer is responsible for implementing
this connection.

• Connecting cables and signal lines should

be installed so that inductive or capacitive
interference does not impair the
automation functions.

• Install automation devices and related

operating elements in such a way that they
are well protected against unintentional
operation.

• Suitable safety hardware and software

measures should be implemented for the
I/O interface so that a line or wire breakage
on the signal side does not result in
undefined states in the automation
devices.

• Ensure a reliable electrical isolation of the

low voltage for the 24 volt supply. Only
use power supply units complying with
IEC 60364-4-41 (VDE 0100 Part 410) or
HD 384.4.41 S2.

• Deviations of the mains voltage from the

rated value must not exceed the tolerance
limits given in the specifications, otherwise
this may cause malfunction and dangerous
operation.

• Emergency stop devices complying with

IEC/EN 60204-1 must be effective in all
operating modes of the automation
devices. Unlatching the emergency-stop
devices must not cause restart.

• Devices that are designed for mounting in

housings or control cabinets must only be
operated and controlled after they have
been installed with the housing closed.
Desktop or portable units must only be
operated and controlled in enclosed
housings.

Eato

n In

dust

ries GmbH

Safety in

struc

tion

Danger!
Dangerous electrical voltage!

• Measures should be taken to ensure the

proper restart of programs interrupted
after a voltage dip or failure. This should
not cause dangerous operating states even
for a short time. If necessary, emergency-
stop devices should be implemented.

• Wherever faults in the automation system

may cause damage to persons or property,
external measures must be implemented to
ensure a safe operating state in the event
of a fault or malfunction (for example, by
means of separate limit switches,
mechanical interlocks etc.).

05/10 MN01219001Z-EN

Introduction

This manual is the documentation for the NZM-XMC meas-
uring modules. The manual describes both device series -
NZMx-XMC-S0 and NZM…XMC-MB.

Target group

The content of the manual is written for engineers and elec-
tricians. A specialist knowledge of electrical engineering is
needed for commissioning.

Other manuals on the
devices

Additional information on the NZM-XMC measuring
modules is provided in the installation instruction
IL01219006Z2010-09 (AWA1230-2617).

List of revisions

Edition
date

Page

Key word

New

Modification

Deleted

05/10

chapter 5, "Display"

chapter 6, "Expansion cards"

all

General revision

Introduction

05/10 MN01219001Z-EN

Reading conventions

The symbols used in this manual have the following mean-
ings:

indicates actions to be taken.

For greater clarity, the name of the current chapter is shown
in the header of the left-hand page and the name of the
current section in the header of the right-hand page. This
does not apply to pages at the start of a chapter and empty
pages at the end of a chapter.

Caution!
Warns of a hazardous situation that could result in
damage to the product or components.

Warning!
Warns of the possibility of serious damage and slight
injury.

Danger!
Warns of the possibility of a hazardous situation that
could result in major damage and serious or fatal injury or
even death.

Draws your attention to interesting tips and supplemen-
tary information

05/10 MN01219001Z-EN

Device overview

Introduction

The NZM-XMC measuring module is a measuring device for
measuring the electrical variables of 3-phase systems. It is
designed with a new mounting and installation concept.

The current carrying cables are passed through the device.
Punch screws are used to fasten the device to the cables and
the voltage is measured.

Actual values, minimum values and maximum values can be
calculated and output over a specified period for currents,
voltages and power.

The measuring and communication modules can be used
flexibly in a voltage range from 35 V to 690 V and for a
current range from 1.5 to 500 A.

The measuring and communication module can be mounted
at any location inside a control panel. The system can be
used regardless of the design and type of circuit-breaker
involved. All existing circuit-breakers and switch-disconnec-
tors can be used. Only the minimum clearance of the circuit-
breaker must be taken into account for mounting.

Once properly installed on wires or buss bars, the device
withstands weights up to 75 kg.

The device does not have a display nor any fixing possibility
for top-hat rails (C profile rails, DIN rails), and can be
fastened to cables easily.

Therefore, we avoid forcing the wires to any position, as
happen with DIN rail devices or devices with front panel
displays. If desired, the device can be fixed to a mounting
plate.

Device overview

05/10 MN01219001Z-EN

Device types

Two sizes are available that are designed for the current
ranges of the NZM.

Size 2 (NZM2-XMC) has a range up to 300 A; the second size
3 (NZM3-XMC) has a range up to 500 A. Both sizes are
available in 3 pole or 4 pole versions (NZM…-4-XMC-…).

One version is provided with a digital S0 output (see also the
note on page 7) and another version is provided with a
MODBUS interface and display interface. A display unit with
LED display for showing the measured values is also avail-
able.

A total of eight types of NZM-XMC measuring and commu-
nication modules are available.

Table 1:

Overview of device types

Device type

Number
of poles

Maximum
current [A]

Property

Basic device

NZM2-XMC-S0

300

Digital output S0

NZM3-XMC-S0

500

Digital output S0

NZM2-4-XMC-S0

300

Digital output S0

NZM3-4-XMC-S0

500

Digital output S0

NZM2-XMC-MB

300

+ MODBUS + display interface

NZM3-XMC-MB

500

+ MODBUS + display interface

NZM2-4-XMC-MB

300

+ MODBUS + display interface

NZM3-4-XMC-MB

500

+ MODBUS + display interface

Display

NZM-XMC-DISP

Display device for all basic devices

1) NZMx: x = 2: for currents up to 300 A; x = 3: for currents up to 630 A

Device types

05/10 MN01219001Z-EN

S0 interface

The S0 interface is a hardware interface for transferring
electrical measured values. It is defined in the DIN 43 864
standard. The data is transferred by means of weighted
pulses (pulses per kWh); the weighting depends on the
type of meter.

Ensure correct polarity when connecting the interface,
since the output is implemented as a transistor or opto-
coupler. A maximum 27 V DC voltage can be connected.
The maximum current is approx. 30 mA.

The signal is generated by the meter as a current pulse.
A current flow less than 3 mA corresponds to a Low value.
A larger current flow is interpreted as a High value.

The S0 interface described above must not be confused
with the S0 bus within an ISDN installation!

05/10 MN01219001Z-EN

Installation

Mounting

The NZM-XMC measuring modules can be mounted in two
ways:

They can fastened either to a mounting plate or "hung
fastened" on the cables.

Guide the cable through the three tunnels.
Ensure that the phase sequence L1, L2, L3, N and the
current direction are correct. If necessary use a cable
adapter.

Figure 1: Inserting the cables

Fasten the device (if required) to the mounting plate. For
this the device does not have to be fastened separately,
but is simply secured by the cables or the distribution rail.

Electric current! Danger to life!
Only skilled or instructed persons may carry out the
following operations.

Installation

05/10 MN01219001Z-EN

Figure 2: Attachment to the mounting plate

Tighten the screws for the cable terminals.

M5 X 80
DIN 912

NZM...-XMC 191 mm

NZM...-4-XMC 2

33 mm

Mounting

05/10 MN01219001Z-EN

Figure 3: Tightening the screws

Allen M2.5

Danger of electrical shock!
For this wear protective gloves and use an insulated Allen
key.

Screws must punch the copper in order to perform the
voltage sensing

Hexagon keys with a ball head are not suitable for tight-
ening the screws.

The recommended tightening torque for the Toxfree ZH
RZ1-K top cable is 1.8 to 2 Nm.

05/10 MN01219001Z-EN

Operation

The commissioning and operation of the NZM-XMC meas-
uring module are described in the following.

LED indicators

The NZM-XMC measuring module is provided with four
LEDs:

• Power On LED: Red flashing means that the device is

connected and working properly.

• LEDs L1, L2 and L3 indicate the following:

– Continuously lit: Phase and voltage are correct
– Fast flashing: No phase voltage present
– slow flash: phase sequence error

Pulse output

Pulse output is done via an NPN optoisolated transistor. It
must be biased externally.

The transistor for these types of devices can also be
connected via an internal resistor to a bias voltage. For this
connect the external power supply (5 to 48 V DC) with pin 1
of the terminal.

Network operation

The device is designed for operation in solidly grounded Wye
networks with four cables.

If you are using a 3 pole device, you must connect the
‘Neutral voltage’ connector to the neutral pole.

Operation

05/10 MN01219001Z-EN

Connecting the device

Plug in the connectors for NZM…XMC-S0

The following diagram shows the terminals of the
NZM…XMC-S0 version.

Figure 4: Terminals for NZM…XMC-S0 device version

The following table shows the terminal assignment.

Table 2:

Terminal assignment for NZM…XMC-S0

1 2 3

4 5 6 7

8 9

24 V DC supply

Neutral voltage
Nullleiter

Pulse output
Impulsausgang

Connection

Explanation

Pulse output

3 x 3.5 mm
Phoenix Contact MC 1.5/4-ST-3.5

Base voltage

NPN collector

NPN emitter

Neutral pole

4 x 3.5 mm
Phoenix Contact MC 1.5/4-ST-3.5

Neutral voltage V

Supply

2 x 7.62 mm
Phoenix Contact GMVSTBR 2.5/2-ST-
7.62

GND

24 V DC supply voltage

Connecting the device

05/10 MN01219001Z-EN

Figure 5: Connection with external resistor

Figure 6: Connection when using the integrated resistor

The energy pulse rate is 15 pulses/kWh (300 A).

The energy pulse rate is 7 pulses/kWh (500 A).

Caution!
In 3 pole version, neutral voltage connector is internally
connected to V

(neutral voltage)

Vdd

GND

Output

Vdd

GND

Output

(+5...48 V DC)

Operation

05/10 MN01219001Z-EN

Plug in the connectors for NZM...XMC-MB

The following figure shows the terminals of the
NZM…XMC-MB version.

Figure 7: Terminals for NZM…XMC-MB device version

The following table shows the terminal assignment.

Table 3:

Terminal assignment for NZM…XMC-MB

1 2 3

4 5 6 7

8 9 10 11 12 13 14 15 16 17

B A

RS485

24 V DC

DISPLAY

Exp card 2

Exp card 1

- +

COM

GND

Po2

Po1

18 19

Connection

Explanation

MODBUS isolated

GND isolated

B RS485

A RS485

MODBUS display
(not isolated)

4 x 3.5 mm
Phoenix Contact MC 1.5/4-ST-3.5

0 V (V

= Neutral voltage)

B RS485

A RS485

5 V DC (internal)

Inputs/outputs
(isolated)

10 x 5.08 mm
Phoenix Contact
MVSTBR 2.5/10-ST-5.08

Common output
(1/2 common)

Output 2

Output 1

GND

Connecting the device

05/10 MN01219001Z-EN

Input 1 (referenced to GND)

Pulse output 2 (Collector)

Pulse output 2 (Emitter)

Pulse output 1 (Collector)

Pulse output 1 (Emitter)

Supply

24 V DC-supply voltage
2 x 7.62 mm
Phoenix Contact
GMVSTBR 2.5/2-ST-7.62

GND

24 V

Connection

Explanation

Caution!
Pin 18 (24 V DC supply) is internally connected to pin 11
(I/O).

Pin 4 (MODBUS display) is internally connected to V

(neutral voltage).

Operation

05/10 MN01219001Z-EN

Additional power supply

The device must be fed with 3 W power supply and a DC
voltage of 18 to 36 V.

Figure 8: Connecting to the additional power supply

Use the NZM-XMC-AC device for connecting devices with
230 V.

Connecting the device

05/10 MN01219001Z-EN

Connecting the display

The pins 4 to 7 are provided on the NZM…XMC-MB device
for connecting the NZM-XMC-DISP display unit.

Figure 9: Display unit terminals

DISPLAY

4 x 0.5 mm

H 03 W - F
F 40 m

NZM...-XMC-MB

SV A B GND

5 6 7

NZM-XMC-DISP

05/10 MN01219001Z-EN

Configuring the device

Table 4:

Summary of MODBUS funktion codes

The default setting for addressing the device is:

MODBUS device address:

9600 Baud; no parity; 1 Stop bit, 8 data bits

A special MODBUS command is used for the configuration
after the installation.

The command is sent as a broadcast (address 0), identifying
the device serial number, and setting its MODBUS address
and baud rate (data rate).

The MODBUS address and the data rate will be automati-
cally configured, without resetting the device.

Function
codes

Description

Read multiple coil status

Reading of bit variables (Coils)

Read multiple input status

Reading of bit variables (Inputs)

Read multiple holding registers

Reading of word variables (Register)

Read multiple input registers

Reading of word variables (Inputs)

Force single coils

Writing of a bit variable

Force single registers

Writing of a word variable

Loop back diagnostic test
(00: returnquery data)

Connection test

Force multiple coils

Writing multiple bit variables (Coils)

Force multiple registers

Writing multiple word variables (Register)

Configuring the device

05/10 MN01219001Z-EN

Table 5:

Device configuration data

Installation

The NZM-XMC device is designed for operation in solidly
grounded Wye networks with four cables.

MODBUS

Variable

Range

3000.30001

Device serial number

0 - 999999999

3002H

Device address

1 - 255

3002L

Baud rate

0: 9600 kbit/s
1: 19200 kbit/s
2: 38400 kbit/s
3: 56000 kbit/s
4: 57600 kbit/s

MODBUS register

05/10 MN01219001Z-EN

MODBUS register

The table below lists the MODBUS register ranges.

Table 6:

Assignment of the MODBUS registers

The register assignments are described below.

Variable

Register

Type
R = read/
W = write

a
page

Electrical parameters

0 - 95

Maximum values of the electrical parameters

96 - 191

Minimum values of the electrical parameters

192 - 287

Communications setup

1000 - 1002

R/W

Password setup

1050 - 1051

R/W

General configuration

1100 - 1105

R/W

Alarm 1

1150 - 1156

R/W

Alarm 2

1160 - 1166

R/W

Alarm 3

1170 - 1176

R/W

Alarm 4

1180 - 1186

R/W

Alarm 5

1190 - 1196

R/W

Alarm 6

1200 - 206

R/W

Maximum demand values

1250 - 1251

R/W

Special device configuration

1300

R/W

Address and baud rate

3000 - 3002

Serial number

10000 - 10001

Expansion card 1

20000 - 20003

R/W

Expansion card 2

20010 - 20013

R/W

Configuring the device

05/10 MN01219001Z-EN

Electrical parameters

Registers 0 to 95 (or 287) store the electrical values meas-
ured by the device (actual values).

Two MODBUS registers are required for each value. Each
parameter is thus assigned to a register of 32 bits (of type
“long” with sign bit).

The even-numbered register (left-hand side of the
“Register” column in table 7) contains the high section of
the integer value, whilst the odd-numbered register with the
(right-hand side of the “Register” column in table 7)
contains the low section of the integer value.

The following table 7 lists the electrical parameters.

Some MODBUS drivers decrement the register number
automatically according to the original convention of the
MODBUS system.

This is also the case with drivers of XC controllers. This
therefore requires the register number of the required
parameter in the application to be incremented by 1.

MODBUS register

05/10 MN01219001Z-EN

Table 7:

Electrical parameters

Parameter

Unit

Para-
meter
no.

Actual
value
register

Maximum
value
register

Minimum
value
register

R/
W

high

low

high

low

high

low

Voltage L1

192

193

Current L1

194

195

Active power L1

100

101

196

197

Reactive power L1

var

102

103

198

199

Power factor L1

104

105

200

201

Voltage L2

106

107

202

203

Current L2

108

109

204

205

Active power L2

110

111

206

207

Reactive power L2

var

112

113

208

209

Power factor L2

114

115

210

211

Voltage L3

116

117

212

213

Current L3

118

119

214

215

Active power L3

120

121

216

217

Reactive power L3

var

122

123

218

219

Power factor L3

124

125

220

221

Power 3-phases

126

127

222

223

Inductive reactive
power 3 phases

var

128

129

224

225

Capacitive reactive
power 3 phases

var

130

131

226

227

Consumed capacitive
reactive energy L1

kvarh

132

133

228

229

Power factor 3 phases

134

135

230

231

Frequency cable Lx

Hz x 10

136

137

232

233

Configuring the device

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Consumed
active energy L1

kWh

138

139

234

235

Consumed
active energy L2

kWh

140

141

236

237

Consumed
active energy L3

kWh

142

143

238

239

Produced
active energy L1

kWh

144

145

240

241

Produced
active energy L2

kWh

146

147

242

243

Produced
active energy L3

kWh

148

149

244

245

Consumed inductive
reactive energy L1

kvarh

150

151

246

247

Consumed inductive
reactive energy L2

kvarh

152

153

248

249

Consumed inductive
reactive energy L3

kvarh

154

155

250

251

Active energy 3-phase

kWh

156

157

252

253

Inductive reactive
energy 3 phase

kvarh

158

159

254

255

Capacitive reactive
energy 3 phase

kvarh

160

161

256

257

Apparent power

162

163

258

259

Maximum demand of
parameter defined in
register 1250/1251

164

165

260

261

Parameter

Unit

Para-
meter
no.

Actual
value
register

Maximum
value
register

Minimum
value
register

R/
W

high

low

high

low

high

low

MODBUS register

05/10 MN01219001Z-EN

Consumed capacitive
reactive energy L2

kvarh

166

167

262

263

Consumed capacitive
reactive energy L3

kvarh

168

169

264

265

Apparent power L1

170

171

266

267

Apparent power L2

172

173

268

269

Apparent power L3

174

175

270

271

Temperature

ºC

176

177

272

273

Maximum demand
value L2

178

179

274

275

Maximum demand
value L3

180

181

276

277

Apparent energy
3 phase

kVAh

182

183

278

279

Produced active energy
3 phase

kWh

184

185

280

281

Produced inductive
reactive energy 3 phase

kvarh

186

187

282

283

Produced capacitive
reactive energy 3 phase

kvarh

188

189

284

285

Produced apparent
energy
3 phase

kVAh

190

191

286

287

Parameter

Unit

Para-
meter
no.

Actual
value
register

Maximum
value
register

Minimum
value
register

R/
W

high

low

high

low

high

low

Configuring the device

05/10 MN01219001Z-EN

Maximum and minimum electrical parameters

Registers 96 to 191 store the maximum values of each
parameter (see column “Maximum” in table 7).

Registers 192 to 287 likewise store the minimum values
recorded (see column “Minimum” in table 7).

Communication (RS485) setup

Registers 1000 to 1002 are used for setting up the commu-
nication (RS485).

Register

Variable

Range

1000H

Protocol

0 - MODBUS

1000L

Device address

1 - 255 (default: 2)

1001H

Baud rate

0: 9600 kbit/s
1: 19200 kbit/s
2: 38400 kbit/s
3: 56000 kbit/s
4: 57600 kbit/s

1001L

Parity

0: no (default)
1: flat
2: odd

1002H

Data bits

1 - 8 Bit

1002L

Stop bits

0: 1 Bit (default)
1: 2 Bits

1) H = High byte
2) L = Low byte

To enable changes write “true” to coil 2000.

MODBUS register

05/10 MN01219001Z-EN

Password setup

The settings can be password protected. In this way, data
cannot be deleted accidentally. The two registers 1050 and
1051 are used to set the password.

The password will be required in order to make any further
change on those registers.

Password setting
For protecting the registers, the password must be written at
position 1050, and then, 0x0100 must be written at position
1051.

Delete password
For un-protecting the registers, it is required to write, in the
same command, the password at position 1050, and a 0 at
position 1051.

Configuring the device

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General setup

These variables allow to perform some miscellaneous
setups.

• Register 1101L sets from which line will the device

measure the frequency (register 40h).

• Registers 1103 and 1104 define the pulse output rate. The

value is the required energy, in Wh, for each pulse.

• Register 1105 sets the pulse width, in 10ths of milli-

second.

• Register 1300 toggles between showing phase-phase and

phase-neutral voltage on the voltage registers. Maximum
and minimum voltage registers are affected as well.

Register

Variable

Range

1101L

Line frequency to be measured

0: Line L1
1: Line L2
2: Line L3

1101H

Not used

1103

Active energy output pulse rate
[Wh x pulse]

0 (deactivated) - 9999

1104

Reactive energy output pulse rate
[Wh x pulse]

0 (deactivated) - 9999

1105

Pulse width (in tenths of a
millisecond)

1300

Selects between phase-neutral or
phase-phase voltage.

0 (default value): Phase-neutral voltage
1: phase-phase voltage

20000 - 20003

Expansion card 1

20010 - 20013

Expansion card 2

1) L = Low byte
2) H = High byte

MODBUS register

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Alarm setup

Up to six different alarm messages (load warnings) can be
set. These can be stored in six corresponding register ranges
( a table 8).

These are the alarm settings for the maximum and minimum
values, the trip delay, the monitored parameters and the
output.

• Outputs 1 and 2: Digital outputs of the main board
• Outputs 3 to 6: on expansion card at position 1
• Outputs 7 to 10: on expansion card at position 2

Table 8:

Registers for alarm messages

No. of the alarm

Register range

1150 - 1156

1160 - 1166

1170 - 1176

1180 - 1186

1180 - 1196

1200 - 1206

Register

Variable

Range

1150, 1151

Maximum value

Depends on parameter (default: 0)

1152, 1153

Minimum value

Depends on parameter (default: 0)

1154

Delay

0 - 9999 seconds (default value: 0)

1155H

Parameter code

0 - 48 (0: deactivated)

1155L

Output

0 - 10 (default: 0)

1) H = High byte
2) L = Low byte

Configuring the device

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Maximum demand values

Selected value is sampled every “small” amount of time
during the selected period, and the average value of
sampled values is calculated (Max demand value). The
average is a moving average, so it only computes the values
sampled during the selected period. i.e. if we select 60
minutes, it will show the average of values sampled during
the last 60 minutes.

• “Initialize” resets to 0 all the values sampled during the

seledcted period.

• “Delete” resets the maximum value of the regies (i.e. the

parameters located at modbus registers 164 and 165, for
maximum demand1)

Registers 1250 and 1251 define the behaviour of the meter
for the maximum demand settings value.

The code of the parameter to be monitored must be entered
in register 1250. Register 1251 sets the window time in
minutes.

Register

Variable

Range

1250

Parameter code

0: no maximum setting
X: Parameter code (1 - 48)

1251

Window time (the period in which
the maximum demand value is to
be determined)

1 - 60 minutes

MODBUS register

05/10 MN01219001Z-EN

Registers type relay: setup registers

Special commands

Reset communication configuration
Unknown configuration setup willcause a big problem to the
user. Configuration can be reset applying this sequence:

Power device off.

Connect digital input 0 to “0” logic level, and digital input
1 to “1” logic level.

LED 1 will be off, rest will be on.
You have 2 seconds for connecting both digital inputs to
“0”.

LED 1 will be on.
You have 2 seconds for connecting both digital inputs to
“1”.

LED1 will be off, rest will be on.
You have 2 seconds for connecting both digital inputs to
“0”.

Communication registers will reset to factory configuration
(MODBUS addresss 2, 9600 bps, 8, n, 1), and device resets
automatically.

Variable

Coils

Type

Digital outputs

0 - 9

R/W

Digital inputs

10 - 19

Reset

2000

Delete power values

2100

Initialise maximum acceptance value

2101

Erase maximum and minimum values

2102

Delete power (maximum/minimum
acceptance value)

2103

Delete maximum acceptance value

2104

Configuring the device

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Special device configuration
Mit MODBUS-Register 1300 können die Stromrichtung und
die Phasenfolge wie folgt umgeschaltet werden:

• Bit 0:

– 0 = Real current direction as indicated on the device.
– 1 = Real current direction opposite to the arrow on the

device.

• Bit 1:

– 0 = Phase order OK, as indicated on the device.
– 1 = Phase 1 and phase 3 are switched, compared to the

label on the device.

MODBUS register

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Digital outputs
The range from 0 to 9 is available for the digital outputs.
Digital outputs use an isolated semiconductor relay with a
general terminal.

Enable/disable/read the status of digital outputs.

• 0, 1: The digital outputs of the main board
• 2 to 5: Expansion card 1
• 6 to 9: Expansion card 2

Digital inputs
The range from 10 to 19 is available for the digital inputs.

Read status of digital inputs.

• 10, 11: for the digital inputs of the main board
• 12 to 15: for expansion card 1
• 16 to 19: for expansion card 2

Reset
Resets the device. The setting is returned to 0.

Delete power values
This clears the counter for the power. The value is reset auto-
matically to 0.

Initialise maximum acceptance value
Initializes the maximum acceptance value and clears the
previous value. The setting is reset to 0.

Erase maximum and minimum values
This deletes the maximum and minimum values of each
parameter. The setting is reset to 0.

Deleting power values (maximum/minimum, accept-
ance value)
This setting corresponds to the sending of the three
commands above. The setting is returned to 0.

Delete maximum acceptance value
This setting only deletes the calculated value for maximum
acceptance; the values in the accumulation matrix are
retained. The setting is returned to 0.

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Display

Introduction

The NZM-XMC-DISP display unit is used to display the elec-
trical variables measured by the basic devices. The data is
transferred via an RS485 interface.

Display has the function of masters in the communication
and consequently, periodically, it interrogates to the meas-
uring device to read the electrical parameters that are
needed.

The variables are shown in the following figures.

Display design

The display shows the measured and calculated values in
four lines. The values of the individual cables L1, L2 and L3
are shown together in the display.

The display is provided with four pushbutton actuators at the
bottom edge.

• “reset” pushbutton actuator clears the display.
• Arrow pushbutton actuator: switches to the next value.
• “max” pushbutton actuator: shows the maximum values.
• “min” pushbutton actuator: shows the minimum values.

Display

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Order of displays

The following figures show examples of measured values in
the order how they are shown on the display by scrolling
with the arrow pushbutton actuator.

Figure 10: Order of displays (example)

• The first (i.e. left) display shows the voltage (measured in

Volt, V). Pressing the arrow pushbutton actuator activates
the next display:

• The measured currents are shown (measured in Amps, A).
• Pressing the pushbutton actuator again then causes the

active power (measured in kW) to be shown (third display
from left).

• Pressing the pushbutton actuator again causes the display

of the reactive power (measured in kvar).

Figure 11: Continuation of the above display order

• The next display then shows the power factor (=

• This is followed by information on power as well as induc-

tive and capacitive reactive power.

Order of displays

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• The next display shows the relevant information on

apparent power.

• The last display shows values (frequency, power factor) for

the three phases. Further pressing of the arrow push-
button actuator starts a new display cycle.

Line 4 of the energy values

Holding down the arrow pushbutton actuator (starting from
the first display) for two seconds moves the display of line 4
between the different energy types (active, reactive and
apparent). Press the arrow pushbutton actuator for two
seconds to move to the next energy type.

Figure 12: Order of the different energy types displayed

Display maximum and minimum values

Pressing the max. and min. pushbutton actuators will display
the maximum and minimum values for the current screen.
The relevant display texts will flash.

Deleting maximum and minimum values

Delete the displayed maximum and minimum values by
pressing the two max and min pushbutton actuators simul-
taneously. Press the max pushbutton actuator to toggle
between the options (“yes” and “no” ( a figure 13).

Display

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Figure 13: Deleting maximum and minimum values

If the display shows “yes” on the bottom line, pressing the
arrow pushbutton actuator will delete the value and cause
the display to switch to the next display: the power values.

Pressing the arrow pushbutton actuator enables you to
delete the power values as well. The max pushbutton actu-
ator can be used to toggle between “yes” and “no”.

Figure 14: Display when deleting energy values

You can delete the energy value by pressing the arrow push-
button actuator when “yes” is displayed.

C l r

E n e r

y e s

C l r

E n e r

n o

Order of displays

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The following display is then shown in which the default
screen is set:

Figure 15: Default display after deleting power values

After the arrow pushbutton actuator is pressed, the
following display will appear. This is used to set the default
value of the energy display in line 4.

Figure 16: Default display of energy values in line 4

This is followed by the switch-off delay for the display back-
light.

Figure 17: Switch-off delay for display backlight.

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Expansion cards

Relay cards

The relay card provides the circuit-breaker with two or four
relays.

The relays can be operated manually or be linked to alarms.

Technical data a page 44.

Two relays card

Figure 18: +NZM-XMC-2D0-R, 2 changeover contacts

Four relays card

Figure 19: +NZM-XMC-4D0-R, 4 N/O contacts

RL1

RL2

NZM...-XMC-MB

+NZM-XMC-2DO-R

RL1

RL2

RL3

RL4

NZM...-XMC-MB

+NZM-XMC-4DO-R

Expansion cards

05/10 MN01219001Z-EN

Technical data

Configuration

Write access to the configuration register is through
MODBUS.

Manual relay operation
Each relay is linked with a MODBUS coil, i.eh. the desired
state (Low/High) is written to a linked MODBUS coil
(MODBUS command 05).

Unit

+NZM-XMC-2D0-R

+NZM-XMC-4D0-R

Maximum load current AC

Maximum load current DC

Insulation

V AC

3000

Maximum Voltage
Open contacts

V AC

1000

750

Max. switching power NO

2500

750

150

Max. switching power NC

750

Connection

Phoenix Contact MC 1.5/6-ST-3.5 or similar

Coil

Outputs

NZM-XMC: Output Q1

NZM-XMC: Output Q2

Relay card 1: Output RL1

Relay card 1: Output RL2

Relay card 1: Output RL3

Relay card 1: Output RL4

MODBUS (RS485) expansion
card

05/10 MN01219001Z-EN

Trigger by alarm
Alarms (registers 1150–1200) can also be configured to the
outputs of the relay card.

MODBUS (RS485)
expansion card

The MODBUS expansion card provides an additional
MODBUS interface.

Figure 20: +NZM-XMC-MB , additional MODBUS expansion card

Table 9:

Pin assignment

1 2 3 4 5 6

+NZM-XMC-MB

NZM...-XMC-MB

PIN

Configuration

1, 2

Terminating resistor 120 O

B RS485

A RS485

GND, isolated

Expansion cards

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Technical data

Configuration

Write access to the configuration register is through
MODBUS.

+NZM-XMC-MB

Protocol

MODBUS-RTU/RS485

Commands

03, 04

Isolation

2750 V

rms

Data transfer rate

9600,
19200,
38400,
56000,
57600,
115200

Parity

none, even, uneven

Stop bits

1.2

Connection

Phoenix Contact MC 1.5/6-ST-3.5 or
similar

The MODBUS expansion card must be fitted in slot 1.

Analog expansion card

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Changes are fully applied after NZM-XMC reset.

Analog expansion card

Provides the circuit-breaker with an insulated analog output.

Through the MODBUS register, the output can be specified
as current or voltage output.

Figure 21: +NZM-XMC-1AO, 1 isolated analog output

MODBUS

Description

Area

20000H

Protocol

0 - MODBUS

20000L

Device address

1 - 255,
default 4

20001H

Data transfer rate

0 - 9600,
1- 19200,
2 - 38400,
3 - 56000,
4 - 57600,
5 - 115200

20001L

Parity

0 - none,
1 - even,
2 - uneven

20002H

Data bits

1 - 8 bit

20002L

Stop bits

0 - 1 bit,
1 - 2 bits

1 2 3 4 5 6

+NZM-XMC-1AO

NZM...-XMC-MB

Expansion cards

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Table 10:

Pin assignment

Technical data

Configuration

Write access to the configuration register is through
MODBUS.

PIN

Configuration

1, 2, 3

V+/I

Out

4, 5, 6

V-/I

Unit

+NZM-XMC-1AO

Current output
max. load

470

Voltage output
internal impedance

330

Isolation

rms

2750

Connection

Phoenix Contact
MC 1.5/6-ST-3.5 or
similar

The analog expansion card is fitted in slot 1.

MODBUS

Description

Area

20000-1

Lower limit value

Depend on parameter

20002-3

Upper limit value

Depend on parameter

20004H

Output mode

0 - 0 - 20 mA,
1- 4 - 20 mA,
2 - 0 - 10 mA,

20004L

Parameters

0 - 48

Analog expansion card

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Changes are fully applied after NZM-XMC reset.

Example:

User wants an analog current output, 0-20mA, linked to
“Voltage phase 1” parameter.

The user also wants an output current of 0 mA at U = 100 V
and an output level of 20 mA at U = 300 V.

The analog expansion card is fitted in slot 1.

20000-1 = 100000

20002-3 = 300000

20004H = 0 - 20004L = 1

Hexadecimal: 20000:0x0001; 20001:0x86A0;
20002:0x0004; 20003:0x93E0; 20004:0x0001

The analog expansion card is fitted in slot 2.

MODBUS

Description

Area

20010-1

Lower limit value

Depend on parameter

20012-3

Upper limit value

Depend on parameter

20014H

Output mode

0 - 0 - 20 mA,
1- 4 - 20 mA,
2 - 0 - 10 mA,

20014L

Parameters

0 - 48

The voltage parameter is given in mV.

Expansion cards

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Digital expansion card

Provides the circuit-breaker with four isolated digital
connections (input or output) with an operating voltage of
up to 48 V DC.

I/O function is configurable via MODBUS registers.

Figure 22: +NZM-XMC-4DI-4DO, 4 isolated digital connections

Table 11: Pin assignment

Connection

1 2 3 4 5 6

+NZM-XMC-4DI-4DO

NZM...-XMC-MB

PIN

Configuration

Power supply

E/A 1

E/A 2

E/A 3

E/A 4

GND

No external supply
Logic level: +5 V - 0 V

External supply V DC
Logic level: V - 0 V

1
2

GND

Input: 48 to 0 V
Output: 5 to 0 V

1
2

GND

External V DC

Input: 48 to 0 V
Output: V DC to 0 V

Digital expansion card

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Technical data

Configuration

Changes are fully applied after NZM-XMC reset.

Unit

+NZM-XMC-4DI-4DO

Max. input/output voltage

Output high voltage
(no external voltage supplied)

Input impedance

Output impedance

100

Isolation

rms

2750

Connection

Phoenix Contact
MC 1.5/6-ST-3.5 or similar

The digital expansion card is fitted in slot 1.

MODBUS

Description

Area

20000

Configuration
Slot 1

0 - … all digital connections as
outputs
1 - … all digital connections as
inputs

The digital expansion card is fitted in slot 2.

MODBUS

Description

Area

20010

Configuration
Slot 2

0 - … all digital connections as
outputs
1 - … all digital connections as
inputs

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Appendix

Technical data

Unit

NZM…-XMC-S0

NZM…-XMC-MB

General

Dimensions

209 x 91 x 132 (3 pole)
251 x 91 x 132 (4 pole)

Weight

850 (3 pole)
975 (4 pole)

Material

UL94-V0

Power supply

Voltage

V DC

18 - 36

Maximum current

200

Conductors

Phoenix Contact
GMVSTBR 2.5-2-ST-7.62

Voltage measurement

Rated operational voltage

V AC

690

Maximum surge voltage
8/20 ms

Maximum voltage

V AC

800

Surge impedance
(impedance)

Frequency

45 - 65

Accuracy

0.4 % measured value +
0.05 % FS (full scale)

Category: EN 61010

CAT IV-600 V

Appendix

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Current measurement

Rated operational current

A AC

300 (300 A version)
500 (500 A version)

300

Maximum current

A AC

350 (300 A version)
740 (500 A version)

Maximum current impulse 1s

Frequency Hz

45 - 200

Category EN61010

CAT IV-600 V

Power monitoring

Maximum power (per phase)

kWh

280

Accuracy

0.95 % measurement +
0.05 % FS

Accuracy of active power

Class 1 (IEC 62053-21)

Accuracy reactive energy

Class 2 (IEC 62053-23)

Pulse output

Type

NPN-isolated transistor

VCE max

VCE sat

0.4

max

recommended

Isolation

Max. switching frequency

Pulse width

120

20 (minimum)

Power pulse rate

Pulse/
kWh

15 (with 300 A version)
7 (with 500 A version)

Unit

NZM…-XMC-S0

NZM…-XMC-MB

Technical data

05/10 MN01219001Z-EN

Environmental specifications

Operating temperature

ºC

-15 - +65

Storage temperature

ºC

-40 - +80

Humidity (non-condensed)

5 - 95

Maximum operating height

2000

IP protection class

IP20

Digital output

Part no.

Maximum voltage

350

Maximum current

120

Isolation

2.5

Digital input

Maximum voltage

IHmax

MODBUS output – RS485

Data rate

bit/s

9600, 19200, 38400,
56000, 57600

Stop bits

1, 2

Parity

none, even, uneven

Isolation

MODBUS output – Display

supply

voltage

V DC

Maximum current

m A

180

Unit

NZM…-XMC-S0

NZM…-XMC-MB

For 3 pole devices:
For all 3 pole devices the “neutral Voltage” must be
connected to the neutral terminal (pin 4 - 7).

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Index

Additional power supply ......................................18
Alarm ..................................................................43
Alarm messages ..................................................31

Baud rate ......................................................22, 28

Communication ...................................................28

Data bits  .............................................................28
Device address  ..............................................22, 28
Digital input  ........................................................35
Digital outputs .....................................................35
Display ............................................................5, 37

Connect ........................................................19

LED indicators .....................................................13

Measurement modules ..........................................3
MODBUS register ................................................23
Mounting plate ......................................................9

NZM-XMC-DISP ...................................................37
NZM-XMC-DISP (Display) ....................................37

Parameter

Electrical ......................................................25

Parity ...................................................................28
Password .............................................................29

Deleting .......................................................29
Setting .........................................................29

Protocol ...............................................................28
Pushbutton actuators ..........................................37

Index

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Relay cards ..........................................................43
Reset ...................................................................35

S0 interface ...........................................................7
Serial number ......................................................22
Settings

General ........................................................30
Reset ............................................................35

Stop bits ..............................................................28

Wye network

Solidly grounded ....................................13, 22

Document Outline