MIO offers four opto-isolated input and four reed relay output lines. They are natively supported by the MultiCam driver. Each input line is interrupt-capable, with independent edge sensitivity control. The status of the lines is monitored by eight dedicated LEDs.

The fourth relay output can be configured as an alarm, a watchdog or a standard output. In alarm mode, as long as the application is not started, the relay remains open. Once operating correctly, the application closes the relay. In watchdog mode, as long as the application is not started, the relay remains open. Once operating correctly, the application resets regularly the watchdog timer. If a watchdog time out occurs, the relay is closed.

Each line is available as a pair of electrical wires on the removable sixteen-terminal block.