The Maxiflex M1321A I/O module provides 8 digital inputs with full channel isolation and can monitor the condition of potential-free contacts or contacts with dc potential across them.  Each input uses two sensing wires, fully isolated from each other, to detect the status of the input.

All inputs are opto-isolated from the system logic.

The module may be inserted into any I/O slot in a Maxiflex system.

The status of each input is displayed on a 2×4 LED matrix on the front of the module.

The module can be inserted or removed while the system is powered.