The IPres, IVal and ICapt inputs are rapid inputs, which should be connected to the sensor using either a twisted wire, if it is a dry contact, or using shielded cables if it is a 2 or 3-wire proximity sensor.

The module integrates basic protection against short circuits or polarity inversions. It is necessary however, to use fuses in series for the supplies. These should be non-delay fuses, with a maximum caliber of 1A.

The actuator connected to the Q0 and Q3 outputs has its shared point at 0 V of the supply. If, due to an incorrect contact, or the accidental disconnection of a wire, the output amplifier is no longer connected to the 0 V supply, the point shared by the actuators remains linked to the 0 V; this could generate a current of a few mA from the amplifier, sufficient to keep the low-power actuators locked.

This kind of connection provides the most guarantees, on condition that shared actuators are connected to shared pin bar 2•• (jump wire in position 1-2). In this case there can be no outage of the shared module without an outage of the shared actuators.