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Preventa XU - How to use the muting enable function in XPSLCMUT1160 muting relay

The muting enable function (terminal 11) of the XPSLCMUT1160 muting relay for XUSL2E or XUSL4E light curtains, allows to use it like a simple safety relay by desactivating the muting function for some machine operations. This is possible by terminal 11 deconnection from the 24Vdc power supply through a key selector switch with key withdrawal in both stable positions for example.

In this case, the muting sensors have to stay supplied like in the complete muting function. The start interlock function (S3 button) makes a self-check including the muting sensors and the muting lamp, even if the "muting enable" is not connected to the 24Vdc. When it is de-activated, the sensors operate, but does not inhibit automatically the safety beams of the light curtain. Attached the diagram solution with key selector switch to have both operations : with or without muting function.

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