Communications interface CEM M-RS485 INSTRUCTION MANUAL (M014B01-03-20A)
CEM M-RS485 2 Instruction Manual
CEM M-RS485 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-RS485 CONTENTS SAFETY PRECAUTIONS ��������������������������������������������������������������������������������������������������������������������������������������� 3 DISCLAIMER ����������������������������������������������������������������������������������������������������������������������������������������������������������3 CONTENTS �������������������������������������������������������������������������������������������������������������������������������������������������������������
CEM M-RS485 REVISION LOG Table 1: Revision log. Date Revision Description 07/14 M014B01-03-14A Initial Version 01/15 M014B01-03-15A Changes in the following sections: 4.4.4. 01/16 M014B01-03-16A Changes in the following sections: 4.4.1. 09/16 M014B01-03-16B Changes in the following sections: 4.4.4.3. 07/20 M014B01-03-20A Changes in the following sections: 2.- 4.2. Note: The images of the devices are solely for the purpose of illustration and may differ from the original unit.
CEM M-RS485 1.- VERIFICATION UPON RECEPTION Check the following points upon receiving the device: a) The device meets the specifications described in your order. b) The device has not suffered any damage during transport. c) Perform an external visual inspection of the device 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.
CEM M-RS485 3.- DEVICE INSTALLATION 3.1.- PRELIMINARY RECOMMENDATIONS In order to use the device 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-RS485 device must be installed by authorised and qualified staff.
CEM M-RS485 3.2.- INSTALLATION On the side of the device are all of the indications adjusted to the CEI 62052-11 standard. The device is installed on a DIN rail. Before connecting the device, you must couple it to a CEM energy meter as shown in Figure 1 and Figure 2. Figure 1: Coupling the CEM M-RS485 to a CEM energy meter. Figure 2: Coupled CEM M-RS485 and CEM. Terminals, opening covers or removing elements can expose parts that are hazardous to the touch while the device is powered.
CEM M-RS485 The device 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 device from the power supply mains. The RCCB or equivalent device must be in the immediate vicinity of the device and must be easily accessible. The power circuit is connected with a cable with a section measuring up to 2.5 mm2. The RS-485 connector enables cables of up to 1.
CEM M-RS485 3.4.- CONNECTION DIAGRAM The RS-485 cable must be made up of a twisted pair cable with a braided shield with a maximum distance of 1,200 metres between the CEM M-RS485 and the master device. A maximum of 32 devices can be connected to this bus. Use an intelligent RS-232 to RS-485 network protocol converter to establish communications with the master device. PC RS-232 / USB / Ethernet / Profibus ... Alimentación Power Supply RS-232 USB Ethernet Profibus ...
CEM M-RS485 4.- OPERATION The CEM M-RS485 is designed to be used as a RS-485 electrical port for any device in the CEM family, using the mechanical coupling next to the optical port. 4.1.- OPERATING PRINCIPLE The CEM M-RS485 is an optional accessory for electrical energy meters from the CEM range that are mounted on DIN rails. The CEM M-RS485 provides CEM devices with RS-485 communications with the MODBUS protocol. Once the device is coupled to the CEM energy meter (See “3.2.
CEM M-RS485 Table 3:LINK LED, colour codes. LINK LED Colour Status Flashing red Device not linked Steady green Device linked COMS LED: Flashes with each transmission made by the RS-485 port. 4.3.- OPTICAL COMMUNICATIONS PORT The device 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.
CEM M-RS485 Address Function No. of bytes Serial no. CRC 01 04 04 XXXX XXXX CRC Note: The values are shown in hexadecimal. The number of requested logs must be the same as the size of the variable requested. It is possible to read several consecutive addresses, if the request meets the correct format. 4.4.3.- WRITE COMMANDS The CEM M-RS485 supports integer type write functions: 0x01. The device's Modbus variables are specified in Table 4.
CEM M-RS485 Table 4:Modbus configuration variables CEM M-RS485. Description Address Size Valid data range Default value Modbus address 0x03E8 16 bits 1 ...
CEM M-RS485 4.4.4.3.- Operating time, cost and KgCO2 atmospheric emissions The Read function is implemented for these variables.
CEM M-RS485 4.4.4.5.- Other parameters The Read function is implemented for these variables. Table 8: Modbus variables: Other parameters.
CEM M-RS485 Table 9 (Continuation): Energy meter model description table.
CEM M-RS485 Table 11 (Continuation): Modbus variables: Available addresses by device.
CEM M-RS485 5.- TECHNICAL FEATURES Power supply Rated voltage 230 V~ ± 20% Maximum power consumption Frequency 4 VA 50/60 Hz with no differentiation Insulation AC voltage 4kV RMS 50Hz during 1 minute Overimpulse 1.
CEM M-RS485 61 65 44 45 5 35.5 90 35 Figure 6: CEM M RS-485 dimensions.
CEM M-RS485 6.- MAINTENANCE AND TECHNICAL SERVICE The unit does not need any type of maintenance. In the case of any query in relation to unit 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.es 7.
CEM M-RS485 8.
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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.
