Communications interface CEM M-ETH INSTRUCTION MANUAL (M060B01-03-21A)
CEM M-ETH 2 Instruction Manual
CEM M-ETH SAFETY PRECAUTIONS Follow the warnings described in this manual with the symbols shown below. 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. 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.
CEM M-ETH CONTENTS SAFETY PRECAUTIONS ���������������������������������������������������������������������������������������������������������������������������������������������������������3 DISCLAIMER ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������3 CONTENTS ������������������������������������������������������������������������������������������������������������������������������
CEM M-ETH REVISION LOG Table 1: Revision log.
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 company and/or CIRCUTOR's after-sales service. 2.
CEM M-ETH 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.
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.
CEM M-ETH 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 disconnecting 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 accessible. The power circuit is connected with a cable with a section measuring up to 2.5 mm2.
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. 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.
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.
CEM M-ETH 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.
CEM M-ETH 4.4.2.2.- Energy The Read function is implemented for these variables.
CEM M-ETH Table 9 (Continuation): Modbus variables: Instantaneous values.
CEM M-ETH Table 11: Energy meter model description table. Options C10 2 wires Connection mode Measurement voltage Current measurement Frequency Communications Expansion Model Number of quadrants Additional features C30 bytes in ASCII format 2 4 wires Accuracy C20 4 Class B active / Does not measure reactive energy 10 Class B active / Class 2.0 reactive 12 1x230 E 1x127 B U 3x127/220 ...
CEM M-ETH 4.4.2.7.- Available addresses by unit Table 13: Modbus variables: Available addresses by unit.
CEM M-ETH Table 13 (Continuation): Modbus variables: Available addresses by unit. 18 Address C10 C20 C30 Description 0x075C Total apparent power 0xF010 Energy meter model 0x2710 Serial no.
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.
CEM M-ETH 61 65 44 45 5 35.
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) email: sat@circutor.com 7.
CEM M-ETH 8.
CEM M-ETH Instruction Manual 23
CIRCUTOR, SA Vial Sant Jordi, s/n 08232 -Viladecavalls (Barcelona) Tel.: (+34) 93 745 29 00 - Fax: (+34) 93 745 29 14 www.circutor.es central@circutor.
