Circutor CEM M-ETH Manual de usuario
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.
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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.
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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
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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.
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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.
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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.
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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
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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
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CEM M-ETH
Instruction Manual
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