The I8O8 8-Channel Digital I/O Module w. Relay Board is one of the Modbus-compatible modules that can be used to control low power loads and collect digital data from switches or float sensors. This module can power up to 10A at 250V AC through each relay output. Up to 8 digital inputs can be connected and can detect input voltages ranging from 3 to 25V DC with an LED indication of the status.

It can be configured and controlled by any Modbus RTU master device over RS-485.