CMIO353 (MIO1240) 1 channel output unit mains ratedThe CMIO353 (MIO1240 is a single channel input output unit, the output is capable of switching up to 1A at 230V AC, commonly used for applications such as door release controls and plant shut down signalling. The input is monitored for open and short circuits, and is suitable for use as a fire signal input such as from a sprinkler flow switch, however it can also be used to monitor non fire inputs such as an external keyswitch to activate day night