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.
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 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.
Before connecting the unit, you must couple it to a CEM energy meter as shown in Figure 1 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.
The power circuit is connected with a cable with a section measuring up to 2.5 mm 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.
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.
CEM M-ETH 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.
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...
0.0000 ... 9.0000 with 4 decimal places of KgCO 0x00B2 32 bits 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” Instruction Manual...
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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 KgCO atmospheric emissions The Read function is implemented for these variables.
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0x075C 32 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” 4�4�2�5�- Other parameters The Read function is implemented for these variables. Table 10: Modbus variables: Other parameters�...
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CEM M-ETH Table 11: Energy meter model description table� bytes in ASCII Options format 2 wires Connection mode 4 wires Class B active / Does not measure reactive energy Accuracy Class B active / Class 2.0 reactive ...
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CEM M-ETH 4�4�2�7�- Available addresses by unit Table 13: Modbus variables: Available addresses by unit� Address Description 0x03E8 Modbus Address 0x03E9 Transmission speed 0x03EA Communications configuration 0x0080 Impulse output type ...
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CEM M-ETH Table 13 (Continuation): Modbus variables: Available addresses by unit� Address Description 0x075C Total apparent power 0xF010 Energy meter model 0x2710 Serial no. 0x044C Voltage primary 0x044E Voltage secondary ...
CEM M-ETH 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 0Ω source impedance 6 kV at 60º and 240º, with positive and negative polarization...
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CEM M-ETH Figure 7: CEM M-ETH dimensions Instruction Manual...
CEM M-ETH 6.- MAINTENANCE AND TECHNICAL SERVICE The unit does not need any type of maintenance. In the case of any query in relation to device operation or malfunction, please contact the CIRCUTOR, SA Technical Support Service. Technical Assistance Service Vial Sant Jordi, s/n, 08232 - Viladecavalls (Barcelona) Tel: 902 449 459 ( España) / +34 937 452 919 (outside of Spain)
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