Leuze electronic MLC 500 - Test Input

Functions
Leuze electronic MLC 510 15
4.3 Test input
As AOPD type4, the devices of the MLC 500 series are equipped with permanent, automatic monitoring.
An external test signal is not required.
Depending on the application, external testing may be necessary, however. For this purpose, the MLC 502
transmitters are equipped with an external test input.
• If 24V is applied at pin4 of the transmitter, the OSSDs of the receiver are activated.
• If 0V is applied at pin4 of the transmitter, the OSSDs of the receiver are deactivated.
NOTICE
Safety notices for test function!
Ä For proper testing, connect the activation input of the transmitter to a test monitoring unit.
If you are using an external test function, the safety light curtain is a contactless protective
device only in connection with a safety-relevant control system in which cyclical testing is
carried out in accordance with IEC/EN61496-1, up to category2 and PLc in accordance
with ENISO13849-1.
Ä The test duration during access guarding must not exceed 150ms.
Ä When the safety light curtain is used for access guarding, the output switching elements of
the test monitoring unit must remain in the 'off' state for at least 80ms subsequent to sensor
activation so that the downstream equipment can be switched off safely.