Before using the installation or during a periodic check (service), it may be useful to test the module and its functions. Follow the procedures described below.

The module has a built-in external supply check. A module is declared inoperative if the voltage falls below 19 Vdc.

The module’s I/O LED lights up to signal a fault in the power supplied.

In this situation, the module’s safety system remains operational: a drop in voltage to 10 Vdc also causes safety outputs to open, thus switching to the safe position.

The module is protected against polarity reversals, and contains a current limiter set to 750 mA.

In the event of the external supply check not being activated (at set-up), supply faults are not indicated.

With the outputs closed, activate every emergency stop, one at a time, to check that outputs switch to safety mode: LED 26 switches from on to off.

Check safety system activation and that diagnostic data is consistent.

The feedback loop provides the module with a real image of the safety outputs; it is open when outputs are active.

Check the status of the feedback loop in relation to the output control.

Activating the reactivation input between terminals S33 and S34 allows the system to be reactivated when no ES has been requested AND if the feedback loop is closed; the device used is a push button (activated on falling edge or status).

Depending on which reactivation option is chosen, check for correct operation and check the diagnostic indicators.

The two outputs available between terminals 13-14 and 23-24 allow the contactors or pre-actuators to be controlled, the section is isolated from the control section (reactivation).