Lenze E94AYAD - SM300 - Manual (Page 10)

Safety engineering
Basics
Overview of sensors
1
1.1
1.1.9
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1.1-6 EDS94AYAD EN 2.2
Active sensors are units with two-channel semiconductor outputs (OSSD
outputs). Drive-based safety integrated in this device series allows for test
pulses < 1 ms to monitor the outputs and cables.
P/N-switching sensors switch the positive and negative cable or signal and
earth cable of a sensor signal.
Theoutputsmust switchsimultaneously. Nevertheless,safety functionswill
be activated as soon as at least one channel is switched.
Examples of active sensors:
ƒ Lightgrid
ƒ Laser scanner
ƒ Control
For sensor inputs that are not used ”no sensor” must be parameterised. It is
monitored that no sensor signal is applied.
Connected deactivated sensors can create the false impression of safety
technology being provided. For this reason, a deactivation of sensors by
parameter setting only is not permissible and not possible.
Active sensors
Sensor inputs