Specifications are subject to change without notice WM24-96DS 010806

· Class 1 (active energy)
· Class 2 (reactive energy)
· Accuracy 0.5% RDG (current/voltage)

· Universal utility meter and power analyzer

· Backlighted LCD display

· Front size: 96x96 mm

· Measurements of phase and system variables: W, W

dmd

, var,

VA, VA

dmd

, PF, V

L-N

, A, Hz

· Measurements of total energies: kWh, kvarh C+/C-, kvarh L+/L-

· Measurements of partial energies: kWh, kvarh C+/C-, kvarh L+/L-

· Measurements according to EN61036 and EN61268

· Time periods (t1, t2, t3, t4) management by means of input contacts

· Measurements of m

O and m

GAS by means of input contacts

· TRMS measurement of distorted waves (currents/voltages)

· Universal power supply: 18-60VAC/VDC, 90-260 VAC/VDC

· Instantaneous variables read-out: 4x3 1/2 digit

· Energies, water, gas, variables read-out: 1x7 1/2 digit

· Protection degree (front): IP 65

Product Description

µP-based modular universal
utility meter and power ana-
lyzer with built-in program-
ming key-pad.
Particularly recommended for
the analysis of the electtrical

variables, for the multi time
periods (t1, t2, t3, t4) energy
metering and water/gas
metering. Housing for panel
mounting and IP65 (front)
protection degree.

Energy Management
Modular Universal Utility Meter and Power Analyzer
Type WM24-96

Type selection

Power supply

24 VAC -15 +10%
50-60Hz

48 VAC -15 +10%
50-60Hz

115VAC -15 +10%
50-60Hz

230 VAC -15 +10%
50-60Hz

18 to 60VAC/VDC

90 to 260VAC/VDC

Range code

AV4:

208VLL/1/5(6)AAC
-20%

Un +20%

AV5:

400VLL/1/5(6)AAC
-20%

Un +15%

AV6:

100VLL/1/5(6)AAC
-20%

Un +15%

AV7:

660VLL/1/5(6)AAC
-30%

Un +15%

50-60 Hz for all input mod-
ules. Module not removable.

· Up to 2 pulse outputs and up to 2 alarm outputs

· Up to 3 digital inputs for the time period and H

O and

GAS meters management

· MODBUS/JBUS (RTU) Protocol

· Optional RS232, RS422/485 serial ports

Slot C (redundant output or
digital inputs)

XX:

None

R1:

Single relay output
(AC1-8AAC, 250VAC)

R2:

Dual relay output
(AC1-8AAC, 250VAC)

O1:

Single open collector
output (30V/100mADC)

O2:

Dual open collector
output (30V/100mADC)

D1:

3 digital inputs

D2:

3 digital inputs +
aux output

Options

None

RS232 serial port

Model
Range Code
System
Power Supply
Slot A
Slot B
Slot C
Slot D
Options

Ordering Key

WM24-96AV53H XX XX XX XX X

System

Three-phase,
unbalanced load,
with or without
neutral

Slot B (communication)

XX:

None

S1:

Serial port,
RS485 multidrop,
bidirectional

Slot A

XX:

None

Slot D (alarm output)

XX:

None

R1:

Single relay output,
(AC1-8AAC, 250VAC)

R2:

Dual relay output,
(AC1-8AAC, 250VAC)

O1:

Single open collector
output (30V/100mADC)

O2:

Dual open collector
output (30V/100mADC)

NOTE: max digital output (alarms and/or pulses): 2, any exceeding output is redundant.
NOTE: with the A, B, C, D types power supply, only an open collector module or a single relay output module can be
used. The instrument can be fully equipped only with L and H type power supply.

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

no parity, 1 stop bit

Baud-rate

9600 bauds

Protocol

MODBUS/JBUS (RTU)

other characteristics

as per RS422/485

Pulse outputs (on request)

Number of outputs

up to 2

Type

programmable from 1 to 1000
pulses
V

1.2 VDC/ max. 100 mA

OFF

30 VDC max.

Outputs conectable to the
total and/or partial energy
meters

Pulse duration

220 ms (ON),

220 ms (OFF)

according to DIN43864

Insulation

By means of optocuplers,
4000 V

RMS

output to measu-

ring inputs,
4000 V

RMS

output to power

supply input.

Notes

The outputs can be either
open collector type or relay
type (for the relay outputs
refer to the specifications
described in the "alarm out-
puts").

RS422/RS485

(on request)
Multidrop
bidirectional (static and
dynamic variables)

Connections

2 or 4 wires, max. distance
1200m, termination directly
on the instrument

Addresses

255, selectable by key-pad

Protocol

MODBUS/JBUS (RTU)

Data (bidirectional)

Dynamic (reading only)

System and phase variables:
see table "display pages"

Static (writing only)

All the configuration parameters,
activation of the static output.

Data format

1 start bit, 8 data bit,
no parity,1 stop bit

Baud-rate

9600 bauds

Insulation

By means of optocouplers,
4000 V

RMS

output to

measuring input
4000 V

RMS

output to

supply input

RS232

(on request)
bidirectional (static and
dynamic variables)

Connections

3 wires, max. distance 15m,

Data format

1 start bit, 8 data bit

Number of measure inputs

Current

Voltage

Digital inputs

(on request)

AQ1038

Number of inputs: 3 (voltage
free)

Reading voltage

24VDC/1mA

Input frequency

Max. 20Hz, dutycycle 50%

Contact 1 purpose

key-pad programming lock
(when the contact is closed).

Contact 2-3 purpose

To be used in 3 different ways:
· time period selection

(t1-t2-t3-t4) and W

dmd

synchronization;

· Gas total meter, and night

and day tariffs selections

· GAS and WATER, total

meters;

AQ1042

Number of inputs:
3+excitation output (AUX)
(16V<Aux<24VDC, max 15mA)
other characteristics like
AQ1038

Accuracy (display, RS232, RS485)

Ib:5A; Pn= Ib* Un

Current

0.003Ib to 0.2Ib: ±(0.5%

(@ 25°C ± 5°C, R.H.

60%)

RDG + 3DGT); 0,2Ib to
Imax: ±(0.5 RDG + 1DGT)

Phase-neutral voltage

Range Un: ±(0.5% RDG

(@ 25°C ± 5°C, R.H.

60%)

+ 1DGT)

Frequency

±0.1 Hz

Active power/energy

Class 1 according to

(@ 25°C ± 5°C, R.H.

60%)

EN61036 (I start-up: 20mA)

Reactive power/energy

Class 2 according to

(@ 25°C ± 5°C, R.H.

60%)

EN61268 (I start-up: 20mA)

Apparent power

(@ 25°C ± 5°C, R.H.

60%)

±(1% Pn +2DGT)
Ib:1A; Pn= Ib* Un

Current

0.02Ib to Ib:

(@ 25°C ± 5°C, R.H.

60%)

±(0.5%RDG + 3DGT);

Phase-neutral voltage

Range Un:

(@ 25°C ± 5°C, R.H.

60%)

±(0.5% RDG +1DGT)

Frequency

±0.1 Hz

Active power

0.5Ib to Ib: ±(1%RDG +1DGT)

(@ 25°C ± 5°C, R.H.

60%)

0.02Ib to 0.5Ib:
±(1.5%RDG +3DGT)

Reactive power

0.5Ib to Ib: ±(2%RDG +1DGT)

(@ 25°C ± 5°C, R.H.

60%)

0.02Ib to 0.5Ib:
±(3%RDG +3DGT)

Temperature drift

200ppm/°C

Display

Back-lighted LCD 4x3

digits

(instantaneous variables) or
1x7

digits (energy, gas,

water) 70 x 38mm

Display refresh time

700ms

Measurements

Current, voltage, power,
power factor, frequency,
energy. TRMS measurement
of a distorted wave.

Coupling type

Direct

Input impedance

208VLL 5(6)AAC (AV4):

>200 k

400VLL 5(6)AAC (AV5):

>900 k

100VLL 5(6)AAC (AV6):

>200 k

660VLL 5(6)AAC (AV7):

>900 k

Output Specifications

Input Specifications

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

Alarm outputs

(on request)

Number of outputs

up to 2, independent

Alarm type

Up alarm, down alarm

Variables to be controlled

see the "List of the
variables that can be
connected..."

Set-point adjustment

from 0 to 100% of the
electrical scale

Hysteresis

from 0 to 100% of the
electrical scale

On-time delay

0 to 255s

Relay status

Selectable; normally
de-energized and normally
energized

Output type

Relay, SPDT type
AC 1-8A @ 250VAC

DC 12-5A @ 24VDC
AC 15-2.5A @ 250VAC
DC 13-2.5A @ 24VDC

Min. response time

150ms, filters escluded,
Set-point on-time delay: "0 s"

Insulation

By means of optocouplers,
4000 V

RMS

output to

measuring input,
4000 V

RMS

output to

supply input.

Note

The outputs can be either
relay type or open collector
type (for the open collector
output refer to the specifica-
tions described in the "pulse
outputs")

Output Specifications (cont.)

Page Variables

Up to 4 by page

Three-phase system with neutral

Page 1: V L1, V L2, V L3,

V LN

Page 2: AL1, AL2, AL3
Page 3: W L1, W L2, W L3
Page 4: VA L1, VA L2

VA L3

Page 5: var L1, var L2,

var L3

Page 6: PF L1, PF 2,

PF L3, PF

Page 7: W

, var ,

, Hz

Page 8: W

, VA ,

, Hz

Page 9: W dmd, VA dmd

Energy, gas, water, meter pages

See "Energy, gas, water meter
settings" table

Password

Numeric code of max
4 digits; 2 protection levels
of the programming data

1st level

Password "0", no protection

2nd level

Password from 1 to 1000, all
data are protected.

Transformer ratio

CT from 1 to 5000
VT from 1.0 to 1999, where
CT x VT

10000

Power demand (dmd)

Integration time

Programmable from 1 to 30 min

Filter

Filter operating range

From 0 to 100% of the
input electrical scale

Filtering coefficient

1 to 16

Filter action

Measurements, alarms, serial
port (fundamental variables:

V, A, W and their derived ones).

Software Functions

AC voltage

90 to 260 VDC/VAC
18 to 60VDC/VAC
24 VAC -15+10% 50-60Hz
48 VAC -15+10% 50-60Hz

115VAC -15+10% 50-60Hz
230 VAC -15+10% 50-60Hz

Power consumption

30VA/12W (90 to 260V)

20VA/12W (18 to 60V)

Supply Specifications

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

residential, commercial and
light industry environment

Immunity

EN 61000-6-2 (class A)
industrial environment

Other standards

Safety

IEC 61010-1, EN 61010-1

Product

IEC 60688-1, EN 60688-1

Approvals

CE, UL, CSA

Connections 5(6)A

Screw-type, max 2.5 mm

wires

(2 x 1.5mm

)

Housing

Dimensions

96x96x140 mm

Material

ABS, NORYL, PC (front)
self-extinguishing: UL 94 V-0

Protection degree

Front: IP65, NEMA4X, NEMA12
Connections: IP20

Weight

Approx. 400 g (packing incl.)

Operating temperature

0 to +50°C (32 to 122°F)

(R.H. < 90% non-condensing)

Storage temperature

-10 to +60°C (14 to 140°F)

(R.H. < 90% non-condensing)

Installation category

Cat. III (IEC 60664)

Pollution degree

Key-pad lock

by means of a rotary switch
placed behind the display or
by means of a contact (in
case of presence of the
digital inputs modules)

Insulation

4000 V

RMS

between all

inputs/outputs to ground

Dielectric strength

4000 V

RMS

for 1 minute

EMC

Emissions

EN 61000-6-3 (class A)

General Specifications

Waveform of the signals that can be measured

Figure A
Sinewave, undistorted
Fundamental content

100%

Harmonic content

rms

1.1107 | A |

Figure B
Sinewave, indented
Fundamental content

10...100%

Harmonic content

0...90%

Frequency spectrum: 3rd to 16th harmonic

Figure C
Sinewave, distorted
Fundamental content

70...90%

Harmonic content

10...30%

Frequency spectrum: 3rd to 16th harmonic

Mode of operation

Accuracy

Accuracy (RDG) depending on the current

Error

6A (Imax)

5A (Ib)

0.5A
(0.1Ib)
1A
(0.2Ib)

0.25A

(0.05Ib)

0.5A

(0.1Ib)

+1%

+4%

-4%

+1.5%

-1%

EN 61036/ IEC 61036 limits (Active energy)
5(6A) Start-up current: 20mA

-1.5%

Accuracy (RDG) depending on the current

Error

+2%

+4%

-4%

+2.5%

-2%

EN 61268/ IEC 61268 limits (Reactive energy)
5(6A) Start-up current: 20mA

-2.5%

PF=1

PF=L0.5

or C0.8

6A (Imax)

5A (Ib)

0.25A
(0.05Ib)
0.5A
(0.1Ib)

0.1A

(0.02Ib)

0.25A

(0.05Ib)

sin

=0.5

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

Variables that can be displayed in case of a three-phase system, 4-wire connection.

1st variable

2st variable

3st variable

4th variable Notes

V L1-N

V L2-N

V L3-N

= system

A L1

A L2

A L3

W L1

W L2

W L3

VA L1

VA L2

VA L3

var L1

var L2

var L3

PF L1

PF L2

PF L3

= system

W dmd

VA dmd

r.t.

r.t.= symbol of communication

Rx/Tx on the serial port

Wh+ (total)

It depends on the instrument

Wh- (total)

configuration (see also "Energy,

Wh (total)

gas, water settings")

varh (total)

varh L+ (total)

varh L- (total)

varh C+ (total)

varh C- (total)

m3 GAS (day)

m3 GAS (night)

m3 GAS (total)

m3 ACQUA (total)

Wh (tariff 1)

Wh (tariff 2)

Wh (tariff 3)

Wh (tariff 4)

varh (tariff 1)

varh (tariff 2)

varh (tariff 3)

varh (tariff 4)

Display pages

Energy, gas, water meter settings

Set 1 (total)
Wh+ (total)
Wh- (total)
varh C+ (total)
varh C- (total)
varh L+ (total)
varh L- (total)

Set 2 (total and tariffs)
Wh (total)
varh (total)
Wh t1 (partial)
varh t1 (partial)
Wh t2 (partial)
varh t2 (partial)
Wh t3 (partial)
varh t3 (partial)
Wh t4 (partial)
varh t4 (partial)

Set 3 (total and gas)
Wh+ (total)
Wh- (total)
varh C+ (total)
varh C- (total)
varh L+ (total)
varh L- (total)
m

GAS (day tariff)

GAS (night tariff)

Set 4 (total, gas and water)
Wh+ (total)
Wh- (total)
varh C+ (total)
varh C- (total)
varh L+ (total)
varh L- (total)
m

GAS (total)

WATER (total)

The instrument can be configured with four different ways of management of the meters as explained in the table below.

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

Used Calculation Formulas

Base unit

Slot A Slot B Slot C Slot D

RS485 port
Single relay output
Single open coll. output
Dual relay output
Dual open coll. output
3 digital inputs
3 digital inputs + AUX

The available modules

The possible module combinations

· Alarm outputs

N°

Variable

3-phase +

3-phase

Note

neutral no neutral

L-N

= system

var

= system

dmd

ASY

asymmetry

List of the variables that can be con-

nected to:

Type

N. of

Ordering

channels

code

WM24-96 400V L-L 5A (base)

AJ2400

WM24-96 208V L-L 5A (base)

AJ2401

WM24-96 100V L-L 5A (base)

AJ2402

WM24-96 660V L-L 5A (base)

AJ2403

24VAC power supply

AP1025

48VAC power supply

AP1024

115VAC power supply

AP1023

230VAC power supply

AP1022

18-60VAC/DC power supply

AP1021

90-260VAC/DC power supply

AP1020

Relay output

AO1058

Relay output

AO1035

Open collector output

AO1059

Open collector output

AO1036

Digital inputs

AQ1038

Digital inputs + AUX

AQ1042

RS485 serial port (1)

AR1034

RS232 serial port (1)

AR1039

Base unit

Slot E

RS232 port

(1)

The RS232 communication port works as
alternative of the RS485 module.

Phase Variables
Instantaneous effective voltage

Instantaneous active power

Istantaneous power factor

Istantaneous effective current

Instantaneous apparent power

Instantaneous reactive power

System variables
Equivalent system voltage

System reactive power

System active power

System apparent power

System power factor

(TPF)

Energy metering

Where:

i = considered phase (L1, L2 or L3)

P = active power

Q = reactive power

, t

= starting and ending time points

of consumption recording

n = time unit
t = time interval between two succes-
sive power consumption

, n

= starting and ending discrete

time points of consumption recording

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

Wiring Diagrams

Single phase

1
1

3
3

5
5

2
2

4
4

6
6

I
I

8
8

7
7

9
9

1
1

3
3

5
5

2
2

4
4

6
6

I
I

8
8

7
7

9
9

1
1

3
3

5
5

2
2

4
4

6
6

I
I

8
8

7
7

9
9

CT connection

Direct connection

CT and VT connection

Fig. 1

Fig. 2

Fig. 3

Three-phase - Unbalanced load

CT connection (3-wire system) ARON

CT and VT connection (3-wire system) ARON

CT connection (4-wire system)

CT and VT connection (4-wire system)

Fig. 4

Fig. 5

Fig. 7

Fig. 8

Fig. 9

CT and VT connection (3-wire system)

Fig. 6

CT and VT connection (3-wire system)

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

Wiring diagrams: digital input modules

Connection by
means of NPN
transistors.
Digital input
module:
AQ1042.

Connection by
means of con-
tacts.
Digital input
module:
AQ1042.

Connection by

means of con-

tacts.

Digital input

module:

AQ1038.

Connection by

means of PNP

transistors.

Digital input

module:

AQ1042.

Wiring diagrams (optional modules)

Open collector output connection.
This wiring diagram is valid also for the
open collector module with one output.
The load resistances (RC) must be
designed so that the close contact current
is lower than 100mA; the VDC voltage
must be lower than or equal to 30VDC.

1 relay output

4-wire connection of RS485 serial port

2-wire connection of RS485 serial port

2 relay outputs

Specifications are subject to change without notice WM24-96DS 010806

WM24-96

and

- for value programming
- for function selections
- for page scrolling

2. Display

Instantaneous measurements:
- 4x 3 1/2 digit (maximum read-out 1999)
Energies, gas and water:
- 1x 7 1/2 digit (maximum read-out 19.999.999).
Alphanumeric indications by means of LCD display for:
- Displaying configuration parameters
- Displaying all the measured variables.

3. Programming lock

It's possible to lock the program-
ming key-pad by means of a rotary
switch located behind the instru-
ment into the power supply slot.
Turn counterclockwise the
switch to lock the
programming key-pad.

Front Panel Description

1. Key-pad

The programming of configuration parameters and the
display are easily controlled by means of the 3 push
buttons:

- "S" to enter into the programming phase and to confirm
the password

Dimensions

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