Energy Management
Modular Energy Meters
Type EM2-96
• Class 1
• Modular energy meter
• Front size: 96 x 96 mm
• 6-dgt µP-based indicator
• Manual scrolling of partial and total energies: kWh, kVArh
• TRMS measurement of distorted waves (voltage/current)
• All configuration functions selectable by
built-in key-pad
• Password protection of programming parameters
• Front reset of partial energies
• Degree of protection (front): IP 65
• Optional serial RS 422/485 output
• MODBUS, JBUS protocol
Product Description
µP-based modular energy
meter with a built-in configu-
ration key-pad. The energies
are both partial and total
counted. The housing is easy
to mount on a panel and
ensures a degree of protec-
tion (front) of IP 65.
Ordering Key
EM2-96 AV53D XXX
Model
Range code
Measurement
Power supply
1st Output
2nd Output
Type Selection
Range code
AV5:
250/433 VAC - 5 AAC
(max. 300 V (L-N)/
520 V (L-L) - 6 A)
400/690 VAC - 5 AAC
(max. 480 V (L-N)/
830 V (L-L) - 6 A)
1)
Measurement
3:
One phase,
three-phase system,
3 or 4 wires, balan-
ced load;
three phase system,
3 or 4 wires, unba-
lanced load
Power supply
A:
B:
C:
D:
L:
H:
24 VAC, -15% +10%,
50/60 Hz
1) 2)
48 VAC, -15%+10%,
50/60 Hz
1) 2)
115 VAC, -15%
+10%, 50/60 Hz
1) 2)
230 VAC, -15%
+10%, 50/60 Hz
2)
(standard)
18 to 60 VDC/AC
3)
90 to 260 VDC/AC
3)
1st Output (contact)
XX:
No output (standard)
O1:
Single open collector
output (30 V/100 mADC)
1)
O2:
Dual open collector
output (30 V/100 mADC)
1)
R1:
Single relay output,
(AC1-8 AAC, 250 VAC)
1)
R2:
Dual relay output,
(AC1-8 AAC, 250 VAC)
1)
2nd Output
X:
S:
No output (standard)
Serial output, RS 485
multidrop bidirectional
with control relay
1)
AV7:
1)
On request
2)
This power supply cannot be used if the RS485 module is needed
3)
Compatible with any kind of output
Input Specifications
Accuracy
(48 to 62 Hz)
(@ 25°C ±5°C, R.H.
≤
60%)
Additional errors
Humidity
Power supply
Magnetic field
Rated input
Current
±1% rdg (hour time base)
<0.3% f.s., 60% to 90% R.H.
±0.5% rdg, -15 +10% p.s.
< 0.1% f.s. @ 400 A/m
2 inputs (one/three-phase
balanced load)
6 inputs (one/three-phase
unbalanced load)
2 inputs (one/three-phase
balanced load)
4 inputs (one/three-phase
unbalanced load)
Rated input (cont.)
Insulation
among the voltage and the
current inputs: 2000 Vrms;
among the current inputs:
2000 Vrms
±250 ppm/°C
Backlighted LCD, h: 13 mm,
6-dgt
Automatic selection accord-
ing to the counted energy.
Max resolution: 1 Wh/1 VArh
Min. resolution: 1 KWh/1 KVArh
Max. 999999 min. –199999
Max. 999999 min. 0
3 times/second
Temperature drift
Display
Decimal point position
Voltage
Max. and min. indication
Active energy
Reactive energy
Sampling rate
Specifications are subject to change without notice (17.10.00)
1
EM2-96
Input Specifications (cont.)
Measurements
Total energies
Partial energies
Measurement method
Keyboard
kWh, kVArh
kWh, kVArh
TRMS measurement of a dis-
torted voltage/current wave
Coupling type: Direct
Crest factor:
≥
3
250 V/433 V (≥ 400kΩ)
5 AAC (≤ 0.3 VA /
≤
0.1Ω)
400V/690V (≥ 650kΩ)
48 to 62 Hz
1.2 x Un/In
2 x Un
20 x In
4 keys:
”∆∇”:
- to enter programming
phase and password con-
firmation;
- for value programming
and basic measurement
scrolling.
“E”:
- for confirmation of new
programmed values and
going ahead to the next
programming step,
- total or partial energy
scrolling.
“R”:
- for the reset of the partial
counted active and/or
reactive energy.
Ranges (impedances)
Frequency range
Over-load protection
Continuous: voltage/current
For 1 s
Voltage:
Current:
Output Specifications
Contact output
(on request)
Type
Static type
Relay type
Driven only by the serial
communication
Open collector (NPN transistor)
V
ON
1.2 VDC/max. 100 mA
V
OFF
30 VDC max.
1 x SPDT
AC 1 - 8 A @ 250 VAC
DC 12 - 5 A @ 24 VDC
AC 15 - 2.5 A @ 250 VAC
DC 13 - 2.5 A @ 24 VDC
130.000 cycles
By means of optocouplers,
4000 Vrms output to
measuring input,
4000 Vrms output to
supply input.
RS422/RS485;
Multidrop bidirectional
(static and dynamic
variables)
2 or 4 wires, max. distance
1200 m, termination directly
on the module
1 to 255, selectable by key-pad
MODBUS/JBUS
Data (bidirectional)
Dynamic (reading only)
System variables:
P, Q, PF, V
L-L
,
energies,
Single phase variables:
P
L1
, Q
L1,
PF
L1
, V
L1-N
, A
L1
,
P
L2
, Q
L2
, PF
L2
, V
L2-N
, A
L2
,
P
L3
, Q
L3
, PF
L3
, V
L3-N
, A
L3
For the accuracy information
refer to WM2-96
All programming data, reset
of energy:
- partial kWh
- partial kVArh
- total kWh
- total kVArh
Stored energy (EEPROM)
≤
999999 kWh
≤
999999 kVArh
1-start bit, 8-data bit, no
parity/even parity, 1 stop bit
1200, 2400, 4800 and 9600
selectable bauds
By means of optocouplers,
4000 Vrms output to
measuring inputs
4000 Vrms output to
supply input
Static (writing only)
Insulation
Serial output
(on request)
Type
Data format
Baud-rate
Insulation
Connections
Adresses
Protocol
Supply Specifications
AC voltage
230 VAC (standard),
-15%+10% 50/60 Hz
24 VAC, 48 VAC, 115 VAC
(on request),
-15%+10% 50/60 Hz
18 to 60 VDC/AC
90 to 260 VDC/AC
Power consumption
≤
30 VA/12 W (90 to 260 V)
≤
20 VA/12 W (18 to 60 V)
2
Specifications are subject to change without notice (17.10.00)
EM2-96
Software Functions
Password
1st level
2nd level
Measurement scrolling
Numeric code of max. 3 di-
gits; 2 protection levels of
the programming data
Password “0”, no protection
Password from 1 to 255, all
data are protected
total and partial active
energy (kWh),
total and partial reactive
energy (kVArh)
Partial energy meters:
the counters of kWh and
kVArh are automatically
reset when the energy
reaches the value
(14999*CT ratio)
Example: the CT is a
100A/5A so the ratio is 20,
consequently the maximum
counted energy is 299980
kWh or kVArh
For CT up to 5000 A
0.1 to 999.9
0 to 100% of the
input electrical scale
1 to 64
Only on the variable being
transmitted by the serial
communication port
Transformer ratio
Programmable ratio
Digital Filter
Filter operating range
Filtering coefficient
Filter action
General Specifications
Operating temperature
Storage temperature
Insulation reference voltage
Insulation
Dielectric strength
Noise rejection
CMRR
EMC
0° to +50°C (32° to 122°F)
(R.H. < 90% non-condensing)
-10° to +60°C (14° to 140°F)
(R.H. < 90% non-condensing)
300 Vrms to ground
4000 Vrms between all inputs/
outputs to ground
4000 Vrms for 1 minute
100 dB, 48 to 62 Hz
EN 50 081-2, EN 50 082-2
Safety standards
Connector
Housing
Dimensions
Material
Degree of protection
Weight
IEC 61010-1, EN 61010-1
Screw-type,
max. 2.5 mm
2
wires x 2
96 x 96 x 140 mm
ABS,
self-extinguishing: UL 94 V-0
Front: IP65
Approx. 500 g
(packing included)
The available Modules
Type
EM2-96 base + AV5.3 input
EM2-96 base + AV7.3 input
24 VAC power supply
48 VAC power supply
115 VAC power supply
230 VAC power supply
18-60 VAC/DC power supply
90-260 VAC/DC power supply
RS485 output
Relay output
Relay output
Open collector output
Open collector output
N. of
channels
Ordering
code
AC 1014
AC 1015
AP1025
AP1024
AP1023
AP1022
AP1021
AP1020
AR1034
AO1058
AO1035
AO1059
AO1036
Note
1
1
2
1
2
The second output can be used as redundant output
The second output can be used as redundant output
The possible Module Combinations
Basic unit
RS485 output
Single relay output
Single open collector output
Out 1
Out 2
Basic unit
RS485 output
Dual relay output
Dual open collector output
Out 1
Out 2
Specifications are subject to change without notice
3
EM2-96
Mode of Operation
Waveform of the signals that can be measured
Figure G
Sine wave, undistorted
Fundamental content
100%
Harmonic content
0%
1.1107 I A |
A
rms
=
Figure H
Sine wave, indented
Fundamental content
10...100%
Harmonic content
0...90%
Frequency spectrum 3rd to 16th harmonic
Required result: additional error < 1%
Figure I
Sine wave, distorted
Fundamental content
70...90%
Harmonic content
10...30%
Frequency spectrum 3rd to 15th harmonic
Required result: additional error < 0.5%
Wiring Diagrams
Single phase input connections
Fig. 2
Fig. 1
Direct connection
CT connection
Three phase/3-wire input connections - Balanced loads
Fig. 3
Fig. 4
Direct connection (3-wire system)
CT connection (3-wire system)
4
Specifications are subject to change without notice (17.10.00)
EM2-96
Wiring Diagrams (cont.)
Three phase, 4-wire input connections - Balanced loads
Fig. 5
Fig. 6
Direct connection (4-wire system)
CT connection (4-wire system)
Three-phase, 3-wire input ARON connections - Unbalanced load
Fig. 7
Fig. 8
CT connection (3-wire system)
Direct connection (3-wire system)
Three phase, 4-wire input connections - Unbalanced load
Fig. 9
Fig. 10
Direct connection (4-wire system)
CT connection (4-wire system)
Specifications are subject to change without notice (17.10.00)
5
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