The COM102 module for the backplane offers 2 serial interfaces. The standards RS-485, RS-422 and RS-232 can be selected as well as the baud rate and the handshake procedure. The interfaces can be used with the communication solutions for Modbus RTU/ASCII, IEC 60870-5-101 and -103 or DNP3. Customized protocols can be implemented in PLC and C/C++. Thanks to the native mapping of the COM ports in the operating system of the controller CPU, no fieldbus data points need to be considered in the application program. The LEDs on the module enable targeted diagnostics in the switch cabinet even without a PC.
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