Contrel EMA-90N Power meter Owner's Manual
Contrel EMA-90N Power meter is an advanced electrical measurement analyzer designed for monitoring and analyzing key electrical parameters. This device provides real-time insights into voltage, current, power, energy, and frequency, offering valuable data for various electrical applications.
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EMA-90N User Manual IM128-U v1.1 Pag. 1 / 32
EMA-90N
Electrical Measurement Analyzer
User Manual
IM128-U v1.1
EMA-90N
Electrical Measurement Analyzer
User Manual
IM128-U v1.1
EMA-90N User Manual IM128-U v1.1 Pag. 2 / 32
Index
Description ................................................................................................................................................................................................................3
Installation .................................................................................................................................................................................................................4
Auxiliary power supply ..........................................................................................................................................................................................4
Voltage Inputs .......................................................................................................................................................................................................4
Current Inputs .......................................................................................................................................................................................................4
Digital Inputs / Outputs .........................................................................................................................................................................................8
Serial (RS-485) .......................................................................................................................................................................................................8
Profibus .................................................................................................................................................................................................................8
Ethernet ................................................................................................................................................................................................................8
M-Bus ....................................................................................................................................................................................................................8
Keys functionality ......................................................................................................................................................................................................9
Menu .......................................................................................................................................................................................................................10
Visualization and measures .....................................................................................................................................................................................11
Setup .......................................................................................................................................................................................................................13
General ................................................................................................................................................................................................................13
Measure ..............................................................................................................................................................................................................14
Energies and Counters ........................................................................................................................................................................................17
User pages ...........................................................................................................................................................................................................19
Communication ...................................................................................................................................................................................................20
I/O .......................................................................................................................................................................................................................22
Setpoint ...............................................................................................................................................................................................................24
Log .......................................................................................................................................................................................................................27
Math ....................................................................................................................................................................................................................28
Dimensions ..............................................................................................................................................................................................................30
Connections .............................................................................................................................................................................................................30
Technical features ...................................................................................................................................................................................................31
Information in this document is subject to change without notice and does not represent a commitment on the part of Contrel Elettronica Srl.
This documentation is consigned to the customer to enable the correct and safe operation of the instrument; any other use of documentation is strictly
prohibited.
The information contained herein is the property of Contrel Elettronica Srl, and by law, no part of it may be reproduced, transcribed, stored in any retrieval
system, or translated into any language by means (even for internal purposes by the customer) without the express written permission of Contrel Elettronica Srl.
In addition, no part of this manual may be transmitted in any form by any means, including photocopying and recording, for any purposes, without the express
written permission of Contrel Elettronica Srl.
In case of Copyright violation the customer is directly responsible.
TERMS OF WARRANTY
The warranty is valid for the period of 24 months after material receipt.
The warranty covers free repair or replacement of equipment parts, which are recognized as faulty due to manufacturing defects.
Warranty does not cover those parts which results defective due to misuse or improper use, incorrect installation or maintenance, operation by unauthorized
personnel, damage during transportation, or which in any case do not show manufacturing defects of the equipment.
Not included in the warranty terms are technical interventions regarding equipment installation to electrical systems.
The manufacturer declines any responsibility for eventual injury or damage to persons, animals or things as result of failure to follow the instructions in the user
manual or caused by improper use of equipment.
The expenses of transport as well as the relative risks of same both to and from the place of repair, will be the sole responsibility of the user.
This warranty expires after the date of purchase and any assistance required after said date including spare parts, labour, transport of personnel and material
will be charged to the user following the tariffs in force for Technical Assistance Service at the time of such requested service.
In any case the replacement of the equipment as well as the extension of warranty after such breakdown is excluded.
Index
Description ................................................................................................................................................................................................................3
Installation .................................................................................................................................................................................................................4
Auxiliary power supply ..........................................................................................................................................................................................4
Voltage Inputs .......................................................................................................................................................................................................4
Current Inputs .......................................................................................................................................................................................................4
Digital Inputs / Outputs .........................................................................................................................................................................................8
Serial (RS-485) .......................................................................................................................................................................................................8
Profibus .................................................................................................................................................................................................................8
Ethernet ................................................................................................................................................................................................................8
M-Bus ....................................................................................................................................................................................................................8
Keys functionality ......................................................................................................................................................................................................9
Menu .......................................................................................................................................................................................................................10
Visualization and measures .....................................................................................................................................................................................11
Setup .......................................................................................................................................................................................................................13
General ................................................................................................................................................................................................................13
Measure ..............................................................................................................................................................................................................14
Energies and Counters ........................................................................................................................................................................................17
User pages ...........................................................................................................................................................................................................19
Communication ...................................................................................................................................................................................................20
I/O .......................................................................................................................................................................................................................22
Setpoint ...............................................................................................................................................................................................................24
Log .......................................................................................................................................................................................................................27
Math ....................................................................................................................................................................................................................28
Dimensions ..............................................................................................................................................................................................................30
Connections .............................................................................................................................................................................................................30
Technical features ...................................................................................................................................................................................................31
Information in this document is subject to change without notice and does not represent a commitment on the part of Contrel Elettronica Srl.
This documentation is consigned to the customer to enable the correct and safe operation of the instrument; any other use of documentation is strictly
prohibited.
The information contained herein is the property of Contrel Elettronica Srl, and by law, no part of it may be reproduced, transcribed, stored in any retrieval
system, or translated into any language by means (even for internal purposes by the customer) without the express written permission of Contrel Elettronica Srl.
In addition, no part of this manual may be transmitted in any form by any means, including photocopying and recording, for any purposes, without the express
written permission of Contrel Elettronica Srl.
In case of Copyright violation the customer is directly responsible.
TERMS OF WARRANTY
The warranty is valid for the period of 24 months after material receipt.
The warranty covers free repair or replacement of equipment parts, which are recognized as faulty due to manufacturing defects.
Warranty does not cover those parts which results defective due to misuse or improper use, incorrect installation or maintenance, operation by unauthorized
personnel, damage during transportation, or which in any case do not show manufacturing defects of the equipment.
Not included in the warranty terms are technical interventions regarding equipment installation to electrical systems.
The manufacturer declines any responsibility for eventual injury or damage to persons, animals or things as result of failure to follow the instructions in the user
manual or caused by improper use of equipment.
The expenses of transport as well as the relative risks of same both to and from the place of repair, will be the sole responsibility of the user.
This warranty expires after the date of purchase and any assistance required after said date including spare parts, labour, transport of personnel and material
will be charged to the user following the tariffs in force for Technical Assistance Service at the time of such requested service.
In any case the replacement of the equipment as well as the extension of warranty after such breakdown is excluded.
EMA-90N User Manual IM128-U v1.1 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 (63th order) of the voltage and current
signals (also for the 4th current channel).
Configuration
STANDARD Available options
Hardware
Format 96x96 96x96 RINA
Supply 90÷250
Vac/dc
20÷60
Vac/dc
Current inputs 1A & 5A(1) 1A & 5A + 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 3 DO + safety + 4 DI 5 DO + safety + 2 DI 7 DO + safety 3 DO + safety + 2 AO 3 DO + safety + 4 AO
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)(7))
RS485
ETH-WEB(8)(9)
Memory none 4MB
SW Class 1 0.5S 0.2S
Version STD H H+
Note: It is possible select only one option for each category. 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.
(7) the ethernet connector is located on the upper side of the box in the advanced area
(8) 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). In addition, it is possible to set and to download a log file [on web interface 1 MB].
(9) the ethernet connector is located on the back of the box above the terminals of the RS485 communication
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
H+
Advanced function
Waveforms no yes yes
Harmonics no up to 63TH up to 63TH
Dip / Swell no yes yes
Interrupts [0V] no no yes
Parameter 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
Activation DO between setpoint ~ 300 ms
Update of analog outputs >200 ms
<50 ms on request
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 (63th order) of the voltage and current
signals (also for the 4th current channel).
Configuration
STANDARD Available options
Hardware
Format 96x96 96x96 RINA
Supply 90÷250
Vac/dc
20÷60
Vac/dc
Current inputs 1A & 5A(1) 1A & 5A + 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 3 DO + safety + 4 DI 5 DO + safety + 2 DI 7 DO + safety 3 DO + safety + 2 AO 3 DO + safety + 4 AO
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)(7))
RS485
ETH-WEB(8)(9)
Memory none 4MB
SW Class 1 0.5S 0.2S
Version STD H H+
Note: It is possible select only one option for each category. 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.
(7) the ethernet connector is located on the upper side of the box in the advanced area
(8) 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). In addition, it is possible to set and to download a log file [on web interface 1 MB].
(9) the ethernet connector is located on the back of the box above the terminals of the RS485 communication
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
H+
Advanced function
Waveforms no yes yes
Harmonics no up to 63TH up to 63TH
Dip / Swell no yes yes
Interrupts [0V] no no yes
Parameter 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
Activation DO between setpoint ~ 300 ms
Update of analog outputs >200 ms
<50 ms on request
EMA-90N User Manual IM128-U v1.1 Pag. 4 / 32
Installation
Warning for the user
Read carefully the instructions/indications contained in this manual before installing and using the instrument.
The instrument described in this manual is intended for use by properly trained staff only.
Safety
This device has been manufactured and tested in compliance with EN 61010-2 standards. In order to maintain these conditions and to ensure safe operation, it
need to comply with the indications and markings contained in the manual.
When the device is received, before beginning installation, check that it's O.K. And it has not suffered any damage during transport.
When starting installation make sure that the operating voltage and mains voltage are compatible with the device instructions. The device power supply must not
be earthed.
Maintenance and/or repair must be carried out only by qualified and authorized personnel. If there is ever the suspicious that, that there is a lack of safety,
during operation, the device must be disconnected and cautions taken against accidental use.
Operation is no longer safe when:
- The instrument doesn't work.
- The measured value has obviously wrong or unreasonable.
- There is visible damage.
- After serious damage incurred during transport.
- After a storage under unfavourable conditions.
During normal operation of the devices, hazardous voltages at its terminals and in particular on the terminals of voltage and current transformers connected and
on the terminals of the digital input and outputs.
The secondary circuits of the voltage and current transformers are capable of generating hazardous voltages and currents when their primary circuit is powered.
Follow the standard safety precautions when performing any installation or service (such as making sure that the power supply is disconnected, disconnecting
the fuses of the transformer voltages, short-circuiting the secondary of current transformers etc.).
Don’t use the instrument when failure may cause injury or death, or generate sufficient energy to cause a fire.
The instrument is equipped with a fuse on the power supply type: 5x20mm 1A 250V time lag.
Auxiliary power supply
The instrument can be supplied with a voltage independent by the monitoring line. In this case, the instrument continues to operate
independently by the voltage present on the lines under control.
Alternatively, only for 90÷250Vca/cc version, it is possible to take the power from the network under test, using the phase and neutral for a
4-wire network, phase to phase in a 3-wire system without neutral or from a VT in a MT application. In this case when the voltage of the
monitored line falls below the minimum limit, the instrument turns off.
Voltage Inputs
4 terminals are available for direct connection to 3 phase network with neutral. In case of a 3 phases balanced system without neutral, or
not distributed neutral to leave terminal N free.
3 inputs, range 30 ÷ 400Vac phase to neutral - 52 to 693Vac phase to phase (see Technical Features table for details); over these values
must used the external voltage transformers.
Frequency range: 50/60Hz.
Permanent overvoltage allowed: 480Vac phase to neutral - 830VAC phase-phase.
Overvoltage category: II (permanent installations).
Pollution degree: 2 (normally non-conductive, conductive condensation temporary).
Input resistance: > 1.8MΩ.
Load (Burden) for each voltage input: 0.09VA.
Note: To detect the frequency of the network the terminal VL1 must be always connected.
Current Inputs
Current measurements can be performed by connecting the terminals of Current inputs.
All current inputs are isolated by current transformers with different ranges depending on the model of the instrument.
They can be interfaced directly to the line to be monitored or to be connected to the output of external CT with higher range.
The connections to the lines to be monitored are described in chapter “Wiring diagrams”.
With neutral current input option installed, the instrument allows the direct measurement of neutral current in the same way described for
the line inputs.
Note: it is essential to observe the correct phase sequence, not invert the connections between the phases of the current inputs
and voltage (i.e. the CT placed on L1 phase must absolutely match at I1 Current and VL1 voltage). Do not invert the terminals S1
and S2 of the CT because the measurement of power factors, and the powers would no longer be trusted.
Neutral Current: the nominal current range depends by the version.1
2
AUXS2
S1
S2
S1
S2
S1
S2
S1
In
I3
I1
I2N
VL3
VL2
VL1
Installation
Warning for the user
Read carefully the instructions/indications contained in this manual before installing and using the instrument.
The instrument described in this manual is intended for use by properly trained staff only.
Safety
This device has been manufactured and tested in compliance with EN 61010-2 standards. In order to maintain these conditions and to ensure safe operation, it
need to comply with the indications and markings contained in the manual.
When the device is received, before beginning installation, check that it's O.K. And it has not suffered any damage during transport.
When starting installation make sure that the operating voltage and mains voltage are compatible with the device instructions. The device power supply must not
be earthed.
Maintenance and/or repair must be carried out only by qualified and authorized personnel. If there is ever the suspicious that, that there is a lack of safety,
during operation, the device must be disconnected and cautions taken against accidental use.
Operation is no longer safe when:
- The instrument doesn't work.
- The measured value has obviously wrong or unreasonable.
- There is visible damage.
- After serious damage incurred during transport.
- After a storage under unfavourable conditions.
During normal operation of the devices, hazardous voltages at its terminals and in particular on the terminals of voltage and current transformers connected and
on the terminals of the digital input and outputs.
The secondary circuits of the voltage and current transformers are capable of generating hazardous voltages and currents when their primary circuit is powered.
Follow the standard safety precautions when performing any installation or service (such as making sure that the power supply is disconnected, disconnecting
the fuses of the transformer voltages, short-circuiting the secondary of current transformers etc.).
Don’t use the instrument when failure may cause injury or death, or generate sufficient energy to cause a fire.
The instrument is equipped with a fuse on the power supply type: 5x20mm 1A 250V time lag.
Auxiliary power supply
The instrument can be supplied with a voltage independent by the monitoring line. In this case, the instrument continues to operate
independently by the voltage present on the lines under control.
Alternatively, only for 90÷250Vca/cc version, it is possible to take the power from the network under test, using the phase and neutral for a
4-wire network, phase to phase in a 3-wire system without neutral or from a VT in a MT application. In this case when the voltage of the
monitored line falls below the minimum limit, the instrument turns off.
Voltage Inputs
4 terminals are available for direct connection to 3 phase network with neutral. In case of a 3 phases balanced system without neutral, or
not distributed neutral to leave terminal N free.
3 inputs, range 30 ÷ 400Vac phase to neutral - 52 to 693Vac phase to phase (see Technical Features table for details); over these values
must used the external voltage transformers.
Frequency range: 50/60Hz.
Permanent overvoltage allowed: 480Vac phase to neutral - 830VAC phase-phase.
Overvoltage category: II (permanent installations).
Pollution degree: 2 (normally non-conductive, conductive condensation temporary).
Input resistance: > 1.8MΩ.
Load (Burden) for each voltage input: 0.09VA.
Note: To detect the frequency of the network the terminal VL1 must be always connected.
Current Inputs
Current measurements can be performed by connecting the terminals of Current inputs.
All current inputs are isolated by current transformers with different ranges depending on the model of the instrument.
They can be interfaced directly to the line to be monitored or to be connected to the output of external CT with higher range.
The connections to the lines to be monitored are described in chapter “Wiring diagrams”.
With neutral current input option installed, the instrument allows the direct measurement of neutral current in the same way described for
the line inputs.
Note: it is essential to observe the correct phase sequence, not invert the connections between the phases of the current inputs
and voltage (i.e. the CT placed on L1 phase must absolutely match at I1 Current and VL1 voltage). Do not invert the terminals S1
and S2 of the CT because the measurement of power factors, and the powers would no longer be trusted.
Neutral Current: the nominal current range depends by the version.1
2
AUXS2
S1
S2
S1
S2
S1
S2
S1
In
I3
I1
I2N
VL3
VL2
VL1
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
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Key Features
- Real-time electrical parameter monitoring
- THD measurement for energy quality assessment
- Bidirectional energy metering
- RS485, Ethernet, Profibus DP & MBUS communication
- Programmable inputs & outputs
- Harmonic distortion analysis (up to 63rd order)
- Data concentrator functionality
- Advanced analysis functions
- User-configurable setup & display
- Multiple software versions with different functionalities
Related manuals
Frequently Answers and Questions
What are the voltage input ranges for the EMA-90N?
The voltage input range is 30 to 400Vac phase to neutral and 52 to 693Vac phase to phase. Refer to sections 'Technical Features' and 'Voltage Inputs' in the manual for more details.
How can I connect current transformers to the EMA-90N?
Current measurements can be performed by connecting the terminals of the Current inputs. The connections to the lines to be monitored are described in section 'Wiring diagrams' of the manual.
What communication protocols are supported by the EMA-90N?
The EMA-90N supports RS485, Ethernet, Profibus DP, and MBUS. Refer to sections 'Serial (RS-485)', 'Profibus', 'Ethernet', and 'MBUS' in the manual for more details.
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