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Connecting to Danfoss ERC-213

These controllers supports Modbus RTU protocol starting from 4.16 version.

Connection features:

  • fixed communication settings 9600 8, Еven, 1
  • there is TTL tranceiver on-board, so it requires a special TTL-485 adapter.
  • TTL RX - line has a high driving requirement of more than 50 mA, some “third-party” adapters may not work