Contrel EMA-90N - Description

EMA‐90N UserManual IM128‐Uv0.74 Pag.3/32
Description
The EMA (Electrical Measurement Analyzer) has advanced analysis functions that allow the measurement of the main electrical parameters: voltage, current,
frequency, power factor, crest factor, active and reactive power, active and reactive energy. The instrument allows the measurement and analysis in real time of
electrical parameters, also verifying the quality of the energy thanks to THD measurement. Bidirectional metering of energy allows both production and
consumption of energy to be monitored with a single device. All information monitored by the analyzer can be transmitted to remote locations through
communication interfaces RS485, Ethernet, Profibus DP e MBUS.
Interaction with the control and supervision systems is possible using inputs and outputs, all programmable. EMA reads and displays the energy values
measured in other energy meters connected to the network. This is achieved thanks to digital inputs, which are able to acquire the impulses generated by the
counters. In this case, EMA acts as a data concentrator. It not only collects information from the electricity meters but also from the water, gas meters or other.
EMA allows a complete, in-depth analysis of the network quality thanks to the measurement of the harmonic distortion (63
th
order) of the voltage and current
signals (also for the 4th current channel).
Configuration
STANDARD
A
vailable options
Hardware
Format 96x96 96x96 RIN
A
Supply
90÷250
Vac/dc
20÷60
Vac/dc
Current
inputs
1A & 5A
(1)
1A & 5
A
+
Neutral
(1)
1A & 5A
(2)
Rogowski
(3)
Rogowski
+
Neutral
(3)
TTA 50A
(4)
I/O 2 DO
4 DO
4 DI
6 DO
2 DI
8 DO
4 DO
2 AO
4 DO
4 AO
8 DI
2 DO
(5)
4 AI 2 PT100
2 AI
1 PT100
I/O type
DO
photo-mos
DO: photo-mos
DI: 24 Vac/dc
DO: photo-mos
DI: 48 Vac/dc
DO: photo-mos
DI: 115 Vac/dc
DO: photo-mos
DI: 230 Vac/dc
COM RS485
RS485
RS485
RS485
Profibus
RS485
MBUS
ETH-MOD
(6)
RS485
ETH-MOD
(6)
RS485
ETH-WEB
(7)
Memory none 4MB
SW
Class 1 0.5S 0.2S
Version STD HPQ
Note: It is possible select only one option for each row. The selected option replaces the standard configuration.
(1) 5mm - removable terminal block - 10mA÷5A [in class] - Imin read 1mA - Vmin read 1V
(2) 10mm - fixed terminal block - 10mA÷5A [in class] - Imin read 1mA - Vmin read 1V
(3) 0.7mV÷350mV [see class] - Vmin read 0,1mV
(4) 0.1A÷50A
(5) 8DI with one common pin
(6) ETH-MOD version makes available Modbus TCP/IP communication available only. [the ethernet connector is located on the upper side of the box in the
advanced area]
(7) ETH-WEB version makes available Modbus TCP/IP communication and the visualization on web pages of the main measures (through the webserver
inside the instrument). [the ethernet connector is located on the back of the box above the serial ports]
Software versions
To enable one or more options (after the purchase) it’s necessary to input a code in the instrument setup (Setup  General  Password  Enable options).
To obtain this code it is necessary to provide the serial number at the time of the request made to the retailer.
Note: if the options are requested at the time of ordering it is not necessary to enter any code.
Software features
STD
Standard
H
Harmonics
PQ
Power Quality
Waveforms no yes yes
Harmonics no up to 63
TH
up to 63
TH
Dip
/
Swell no no yes
Interrupts [0V] no no yes
Paramete
r
Range
Measures refresh [V, A, W, VAr, Hz] ~ 200 ms
Modbus RTU response (38400 - 32 registers) < 100 ms
Modbus TCP/IP response (MOD-TCP version) < 100 ms
Ping (local network) Min = 4; Avg = 4; Max = 4;
Profibus measures refresh ~ 300 ms
A
ctivation DO between setpoint ~ 300 ms
Update of analog outputs
>200 ms
<50 ms on request