Circutor CEM M-ETH User manual

INSTRUCTION MANUAL
(M060B01-03-21A)
Communications interface
CEM M-ETH

2
CEM M-ETH
Instruction Manual

SAFETY PRECAUTIONS
DISCLAIMER
CIRCUTOR, SA reserves the right to make modifications to the device or the unit specifications set
out in this instruction manual without prior notice.
CIRCUTOR, SA on its web site, supplies its customers with the latest versions of the device specifica-
tions and the most updated manuals.
www.circutor.com
CIRCUTOR, recommends using the original cables and accessories that are supplied
with the device.
DANGER
Warns of a risk, which could result in personal injury or material damage.
ATTENTION
Indicates that special attention should be paid to a specific point.
Follow the warnings described in this manual with the symbols shown below.
If you must handle the unit for its installation, start-up or maintenance, the following should be
taken into consideration:
Incorrect handling or installation of the unit may result in injury to personnel as well as damage to the
unit. In particular, handling with voltages applied may result in electric shock, which may cause death
or serious injury to personnel. Defective installation or maintenance may also lead to the risk of fire.
Read the manual carefully prior to connecting the unit. Follow all installation and maintenance in-
structions throughout the unit’s working life. Pay special attention to the installation standards of the
National Electrical Code.
Refer to the instruction manual before using the unit
In this manual, if the instructions marked with this symbol are not respected or carried out correctly, it can result
in injury or damage to the unit and/or installations.
CIRCUTOR, SA reserves the right to modify features or the product manual without prior notification.
3
Instruction Manual
CEM M-ETH

CONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................3
DISCLAIMER ..........................................................................................................................................................................3
CONTENTS.............................................................................................................................................................................4
REVISION LOG .......................................................................................................................................................................5
1. VERIFICATION UPON RECEPTION....................................................................................................................................6
2. PRODUCT DESCRIPTION .................................................................................................................................................6
3. UNIT INSTALLATION........................................................................................................................................................7
3.1.- PRELIMINARY RECOMMENDATIONS ........................................................................................................................7
3.2.- INSTALLATION .........................................................................................................................................................8
3.3.- UNIT TERMINALS.....................................................................................................................................................9
3.4.- CONNECTION DIAGRAM.........................................................................................................................................10
4. OPERATION.....................................................................................................................................................................11
4.1.- OPERATING PRINCIPLE ...........................................................................................................................................11
4.2.- LED INDICATORS.....................................................................................................................................................11
4.3.- OPTICAL COMMUNICATIONS PORT........................................................................................................................ 12
4.4- RS-485 COMMUNICATIONS.................................................................................................................................... 12
4.4.1.- MODBUS/TCP PROTOCOL ............................................................................................................................. 12
4.4.2.- VARIABLES MODBUS .................................................................................................................................... 13
5. TECHNICAL FEATURES.................................................................................................................................................. 19
6. MAINTENANCE AND TECHNICAL SERVICE ................................................................................................................... 21
7. GUARANTEE................................................................................................................................................................... 21
8. CE CERTIFICATE ............................................................................................................................................................22
Note: The images of the units are solely for the purpose of illustration and may differ from the origi-
nal unit.
4
CEM M-ETH
Instruction Manual

REVISION LOG
Table 1: Revision log.
Date Revision Description
11/14 M060B01-03-14A Initial Version
04/21 M060B01-03-21A Circutor logo change
5
Instruction Manual
CEM M-ETH

1. VERIFICATION UPON RECEPTION
Check the following points upon receiving the unit:
a) The unit meets the specifications described in your order.
b) The unit has not suffered any damage during transport.
c) Perform an external visual inspection of the unit prior to switching it on.
d) Check that it has been delivered with the following:
- An installation guide,.
If any problem is noticed upon reception, immediately contact the transport com-
pany and/or CIRCUTOR's after-sales service.
2. PRODUCT DESCRIPTION
The CEM M-ETH optical-electric interface converts the optical service port of any unit of the CEM
range into an Ethernet port with MODBUS/TCP protocol.
The unit features:
- 3 indicator LEDs: POWER, LINK and LINK/ACT.
The unit is installed on 2-step DIN rails, on the left of any unit of the CEM range.
6
CEM M-ETH
Instruction Manual

3. UNIT INSTALLATION
3.1.- PRELIMINARY RECOMMENDATIONS
In order to use the unit safely, it is critical that the individuals who handle it follow the
safety measures set out in the standards of the country where it is being used, use the
necessary personal protective equipment and pay attention to the various warnings
indicated in this instruction manual.
The CEM M-ETH unit must be installed by authorised and qualified staff.
The power supply plug must be disconnected before handling, altering the connections or replacing
the unit. It is dangerous to handle the unit while it is powered.
Also, it is critical to keep the cables in perfect condition in order to avoid accidents, personal injury and
damage to installations.
The manufacturer of the unit is not responsible for any damage resulting from failure by the user or
installer to observe the warnings and/or recommendations set out in this manual, nor for damage
resulting from the use of non-original products or accessories or those made by other manufacturers.
If an anomaly or malfunction is detected in the unit, do not use the unit to take any measurements.
Inspect the work area before taking any measurements. Do not take measurements in dangerous ar-
eas or where there is a risk of explosion.
Disconnect the unit from the power supply (unit and measuring system power supply)
before maintaining, repairing or handling the unit's connections.
Please contact the after-sales service if you suspect that there is an operational fault
in the unit.
7
Instruction Manual
CEM M-ETH

3.2.- INSTALLATION
On the side of the unit are all of the indications adjusted to the CEI 62052-11 standard.
The unit is installed on a DIN rail.
Before connecting the unit, you must couple it to a CEM energy meter as shown in Figure 1 and Figure 2.
Figure 1: Coupling the CEM M-ETH to a CEM energy meter
Figure 2: Coupled CEM M-ETH and CEM
Terminals, opening covers or removing elements can expose parts that are hazardous
to the touch while the unit is powered. Do not use the unit until it is fully installed.
8
CEM M-ETH
Instruction Manual

The unit must be connected to a power circuit that is protected with gL fuses (IEC 269) or M fuses, with
a rating of 0.5 to 2 A. It must be fitted with a circuit breaker switch or equivalent device for disconnect-
ing the unit from the power supply mains.
The RCCB or equivalent device must be in the immediate vicinity of the unit and must be easily acces-
sible.
The power circuit is connected with a cable with a section measuring up to 2.5 mm2.
The unit's operating temperature is between -25ºC and +70ºC; always use connection
cables that can withstand these temperatures.
3.3.- UNIT TERMINALS
Table 2:List of CEM M-ETH terminals
Unit terminals
1: Auxiliary power supply.
2: Auxiliary power supply.
3: Ethernet.
1 2
3
Figure 3:CEM M-ETH terminals
9
Instruction Manual
CEM M-ETH

3.4.- CONNECTION DIAGRAM
The connection between the CEM M-ETH and the Ethernet network must be made with a twisted pair
cable (100Base-TX: 100Mbit/s on two pairs of wires of Category 5 or higher). The segment length of
the 100Base-T, 10BaseT and 1000Base-T cables is limited to 100 m.
PC
CEM M-ETH
Alimentación
Power Supply
Ethernet
Ethernet
Figure 4: CEM M-ETH connection diagram
10
CEM M-ETH
Instruction Manual

4. OPERATION
The CEM M-ETH is designed to be used as a Ethernet port for any device in the CEM family, using the
mechanical coupling next to the optical port.
4.1.- OPERATING PRINCIPLE
The CEM M-ETH is an optional accessory for electrical energy meters from the CEM range that are
mounted on DIN rails.
The CEM M-ETH provides CEM units with Ethernet communications with the MODBUS/TCP protocol.
Once the unit is coupled to the CEM energy meter (See “3.2.- INSTALLATION”) the LINK LED turns green
to let the user know that the link has been made correctly.
From this point onward, the new CEM energy meter + CEM M-ETH assembly functions as a single
device.
4.2.- LED INDICATORS
The unit has three indicator LEDs:
POWER
LINK
LINK / ACT
Figure 5:CEM M-ETH indicator LEDs
POWER LED: Indicates that the unit is connected to a power supply.
LINK LED: Indicates the status of the link with the CEM unit. (Table 3)
11
Instruction Manual
CEM M-ETH

Table 3:LINK LED, colour codes
LINK LED
Colour Status
Flashing red Unit not linked
Steady green Unit linked
LED LINK/ACT, indicates the state of the Ethernet connection, Table 4.
Table 4: LED LINK/ACT
LED LINK/ACT
Colour Status
On Ethernet link
Off No Ethernet link
Flashing Activity on this port
4.3.- OPTICAL COMMUNICATIONS PORT
The unit has an optical serial communications port on its right side, in accordance with the UNE EN
62056-21:2003 standard, in order to communicate with other devices in the CEM family.
4.4- RS-485 COMMUNICATIONS
4.4.1.- MODBUS/TCP PROTOCOL
The MODBUS/TPC protocol is the MODBUS RTU protocol with a TCP interface that runs on Ethernet.
MODBUS/TCP uses TCP/IP and Ethernet to manage the data of MODBUS messages between
compatible devices.
The MODBUS/TCP protocol embeds a standard MODBUS data frame in a TCP frame without the
Modbus checksum, as shown in the diagram in the figure.
Figure 6:Construction of a MODBUS/TCP data frame
12
CEM M-ETH
Instruction Manual

Table 5 shows the format of the MODBUS/TCP frame.
Table 5: MODBUS/TCP frame format
Name Length Function
Transaction identifier 2 For message synchronisation between the server and client.
Protocol identifier 2 Value 0 for MODBUS/TCP
Field length 2 Number of bytes remaining in the frame
Unit identifier 1 Peripheral number
Function code 1 Modbus function number
Data bytes n Response or command data
The MODBUS functions implemented in the unit are:
Functions 03 and 04. Reading of logs.
Function 10. Writing of multiple logs.
4.4.2.- VARIABLES MODBUS
All MODBUS map addresses are hexadecimal.
4.4.2.1.- Configuration variables
The Read and Write functions are implemented for these variables.
Table 6:Modbus configuration variables CEM M-RS485.
Description Address Size Valid data range Default
value
Impulse output type 0x0080 16 bits 0: Active energy, 1: Reactive energy 0
Impulse output weight 0x0081 16 bits Wh/impulse 0 ... 99999 -
Cost per kWh 0x00B0 32 bits 0.0000 ... 9999.9999 with 4 decimal places of
resolution -
KgCO20x00B2 32 bits 0.0000 ... 9.0000 with 4 decimal places of
resolution -
Note: Some MODBUS variables may not be available depending on the CEM energy meter coupled to
the CEM M-ETH. See “4.4.2.7.- Available addresses by unit”
13
Instruction Manual
CEM M-ETH

4.4.2.2.- Energy
The Read function is implemented for these variables.
Table 7: Modbus variables: Energy
Description Address Size Units
Total values
Imported active energy 0x0000 32 bits Wh
Exported active energy 0x0002 32 bits Wh
Q1 reactive energy 0x0004 32 bits varh
Q2 reactive energy 0x0006 32 bits varh
Q3 reactive energy 0x0008 32 bits varh
Q4 reactive energy 0x000A 32 bits varh
Partial values
Partial imported active energy 0x0030 32 bits Wh
Partial exported active energy 0x0032 32 bits Wh
Q1 partial reactive energy 0x0034 32 bits varh
Q2 partial reactive energy 0x0036 32 bits varh
Q3 partial reactive energy 0x0038 32 bits varh
Q4 partial reactive energy 0x003A 32 bits varh
Note: Some MODBUS variables may not be available depending on the CEM energy meter coupled to
the CEM M-ETH. See “4.4.2.7.- Available addresses by unit”
4.4.2.3.- Operating time, cost and KgCO2atmospheric emissions
The Read function is implemented for these variables.
Table 8: Modbus variables: Operating time, costs and KgCO2
Description Address Size Units
Cost of the partial consumption 0x00C0 32 bits -
KgCO2 atmospheric emissions of the partial consumption 0x00C2 32 bits -
Hours of partial operation 0x00C4 32 bits ( 1 decimal place)
Hours of total operation 0x00C6 32 bits ( 1 decimal place)
Note: Some MODBUS variables may not be available depending on the CEM energy meter coupled to
the CEM M-ETH. See “4.4.2.7.- Available addresses by unit”
4.4.2.4.- Instantaneous values
The Read function is implemented for these variables.
Table 9: Modbus variables: Instantaneous values.
Description Address Size Units
Phase 1 voltage 0x0732 32 bits V (1 primary decimal place)
Phase 2 voltage 0x0734 32 bits V (1 primary decimal place)
Phase 3 voltage 0x0736 32 bits V (1 primary decimal place)
Phase 1 current 0x0738 32 bits A (2 primary decimal places)
Phase 2 current 0x073A 32 bits A (2 primary decimal places)
Phase 3 current 0x073C 32 bits A (2 primary decimal places)
Phase 1 cos φ0x073E 32 bits 2 decimal places
14
CEM M-ETH
Instruction Manual

Table 9 (Continuation): Modbus variables: Instantaneous values.
Description Address Size Units
Phase 2 cos φ0x0740 32 bits 2 decimal places
Phase 3 cos φ0x0742 32 bits 2 decimal places
Phase 1 active power 0x0746 32 bits W
Phase 2 active power 0x0748 32 bits W
Phase 3 active power 0x074A 32 bits W
Total active power 0x074C 32 bits W
Phase 1 reactive power 0x074E 32 bits var
Phase 2 reactive power 0x0750 32 bits var
Phase 3 reactive power 0x0752 32 bits var
Total reactive power 0x0754 32 bits var
Phase 1 apparent power 0x0756 32 bits VA
Phase 2 apparent power 0x0758 32 bits VA
Phase 3 apparent power 0x075A 32 bits VA
Total apparent power 0x075C 32 bits VA
Note: Some MODBUS variables may not be available depending on the CEM energy meter coupled to
the CEM M-ETH. See “4.4.2.7.- Available addresses by unit”
4.4.2.5.- Other parameters
The Read function is implemented for these variables.
Table 10: Modbus variables: Other parameters.
Description Address Size Units
Energy meter model1) 0xF010 6x16 bits 12 bytes in ASCII format
Serial no 0x2710 32 bits -
Transformation ratios
Voltage primary 0x044C 32 bits V (1 decimal place)
Voltage secondary 0x044E 32 bits V (1 decimal place)
Current primary 0x0450 32 bits A (1 decimal place)
Current secondary 0x0452 32 bits A (1 decimal place)
Energy meter firmware version
Higher firmware version 0x0050 16 bits -
Lower firmware version 0x0051 16 bits -
Revised firmware version 0x0052 16 bits -
Communications module firmware version
Higher firmware version 0x0578 16 bits -
Lower firmware version 0x0579 16 bits -
Revised firmware version 0x057A 16 bits -
Note: Some MODBUS variables may not be available depending on the CEM energy meter coupled to
the CEM M-ETH. See “4.4.2.7.- Available addresses by unit”
(1) Energy meter model description table, Table 11.
15
Instruction Manual
CEM M-ETH

Table 11: Energy meter model description table.
Options C10 C20 C30 bytes in ASCII
format
Connection mode 2 wires 2
4 wires   4
Accuracy
Class B active/Does not measure
reactive energy    10
Class B active/Class 2.0 reactive    12
Measurement voltage
1x230 E
1x127 B
3x127/220 ... 3x230/400 V U
3x127/220 V   N
3x230/400 V   Q
3x57/100 ... 3x230/400 V V
3x57/100 V L
3x63.5/110 V M
Current measurement
Shunt 10(60) A S4
Shunt 5(65) A S7
Direct 10(60)A D4
Direct 5(65)A D7
Transformer 5(10) A T5
Transformer 5(6) A T6
Frequency
50Hz    A
60 Hz    B
Automatic (50/60Hz)    C
Communications Without communications    0
Side optical service port    1
Expansion Without inputs/outputs    0
Input/Output (Optocoupler)    1
Model Box for assembly on DIN rail    E
Number of quadrants
2 quadrants    0
4 quadrants    1
Storage in both directions    2
Additional features No special features    0
4.4.2.6.- Partial energy reset
The 0x05 function is implemented for this variable.
Table 12: Modbus variables: Energy
Description Address Activation
Partial energy reset 0x0800 0xFF00
16
CEM M-ETH
Instruction Manual

4.4.2.7.- Available addresses by unit
Table 13: Modbus variables: Available addresses by unit.
Address C10 C20 C30 Description
0x03E8    Modbus Address
0x03E9    Transmission speed
0x03EA    Communications configuration
0x0080    Impulse output type
0x0081    Impulse output weight
0x00B0    Cost per kWh
0x00B2    KgCO2
0x0000    Imported active energy
0x0002    Exported active energy
0x0004    Q1 reactive energy
0x0006    Q2 reactive energy
0x0008    Q3 reactive energy
0x000A    Q4 Reactive energy
0x0030    Partial imported active energy
0x0032    Partial exported active energy
0x0034    Q1 partial reactive energy
0x0036    Q2 partial reactive energy
0x0038    Q3 partial reactive energy
0x003A    Q4 partial reactive energy
0x00C0    Cost of the partial consumption
0x00C2    KgCO2atmospheric emissions of the partial consumption
0x00C4    Partial operating time
0x00C6    Total operating time
0x0732    Phase 1 voltage
0x0734   Phase 2 voltage
0x0736   Phase 3 voltage
0x0738    Phase 1 current
0x073A   Phase 2 current
0x073C   Phase 3 current
0x073E    Phase 1 cos φ
0x0740   Phase 2 cos φ
0x0742   Phase 3 cos φ
0x0746    Phase 1 active power
0x0748   Phase 2 active power
0x074A   Phase 3 active power
0x074C    Total active power
0x074E    Phase 1 reactive power
0x0750   Phase 2 reactive power
0x0752   Phase 3 reactive power
0x0754    Total reactive power
0x0756    Phase 1 apparent power
0x0758   Phase 2 apparent power
0x075A   Phase 3 apparent power
17
Instruction Manual
CEM M-ETH

Table 13 (Continuation): Modbus variables: Available addresses by unit.
Address C10 C20 C30 Description
0x075C    Total apparent power
0xF010    Energy meter model
0x2710    Serial no.
0x044C Voltage primary
0x044E Voltage secondary
0x0450 Current primary
0x0452 Current secondary
0x0050    Higher firmware version
0x0051    Lower firmware version
0x0052    Revised firmware version
18
CEM M-ETH
Instruction Manual

5. TECHNICAL FEATURES
Power supply
Rated voltage 230 V~ ± 20%
Maximum power consumption 4 VA
Frequency 50/60 Hz with no differentiation
Insulation
AC voltage 4kV RMS 50Hz during 1 minute
Overimpulse
1.2/50ms 0Ωsource impedance 6 kV at 60º and 240º, with positive and negative polarization
Memory
Setup, events, load curve Non-volatile EEPROM memory
User interface
LED 3 LEDs (POWER - LINK - LINL/ACT)
Communication
Communications protocol Modbus/TCP
Environmental features
Operating temperature -25ºC... +70ºC
Storage temperature -35ºC... +80ºC
Relative humidity (non-condensing) 5 ... 95%
Maximum altitude 2,000 m
Mechanical features
Dimensions (mm) Figure 7
Enclosure ABS + V0 polycarbonate
Weight 115 gr
Protection degree IP 51 installed
IP 40 in the terminal area
Standards
Safety requirements for electrical units for measurement, control and laborato-
ry use. Part 1: General requirements. EN 61010-1: 2010
Electromagnetic compatibility (CEM). Part 6-2: Generic standards. Immunity for
industrial environments. EN 61000-6-2: 2005
Electromagnetic compatibility (CEM). Part 6-3: Generic standards. Emission
standard for residential, commercial and light industry environments. EN 61000-6-3: 2007
19
Instruction Manual
CEM M-ETH

35
90 45
35.5
5 44
61
65
Figure 7: CEM M-ETH dimensions
20
CEM M-ETH
Instruction Manual