RS485 Modbus RTU Relay (DIN Rail, 8 channels relay + 8 inputs, 2 counters) V2.1


The module with control via a 2-wire RS485 line allows controlling 8 relays via the Modbus RTU protocol, reading the state of 8 discrete opto-isolated inputs, storing and reading the readings of 2 counters (event counters at inputs 1 and 2).

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Updates in version 2.1:

• memory lifespan increased to 100 trillion counter events and 151 years of data retention by using FRAM (ferromagnetic memory) to store counter values;

• complete galvanic isolation of the RS485 line;

• protection against overvoltage and overcurrent of the RS485 line;

• complete optical isolation of inputs;

• circuitry and firmware updated.

General features:

• Size: 157mm wide standard DIN rail housing (157x110 (including connectors) x56mm).

• Commands: standard Modbus RTU read the current state of the relay, change the state of the relay, read the state of the inputs, read the values ​​of the counters, change the baud rate, set the module address, clear the counters.

• Indication: 8 relay status LEDs, 1 power LED.

• Maximum relay load: 7A 250VAC / 15A 120VAC / 10A 30VDC.

• Power supply: 12V 400mA.

• Power consumption: standby - 90 mA, all relays active - 370 mA.

• Inputs: 8 opto-isolated digital inputs.

• Counters: 2 counters (inputs 1 and 2) of faults on the inputs.

• Memory: non-volatile memory for storing settings and counter values.

• Connection: screw terminals.

• Modbus address: (changeable by software) 0 ... 255 (default: 0x01).

• Baud rate: (software configurable) 2400, 4800, 9600, 19200, 28800, 38400, 56000, 57600, 115200, 128000, 256000 (9600 by default).

• Port settings: 8n1


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