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How can I tell the UNIT ID of a given Switching Relay – 4 or 8?

When switching on the power, the LEDs on the front of your Relay - 8 or on the PCB of the Relay - 4 will indicate the UNIT ID (between 1 and 4/8).

If you need to know the ID when it is higher than 4/8, use a LAN or serial command to read it.

The command is: 

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