Lenze E94AYAB − SM100 - Manual (Page 10)

Safety engineering
Basics
Overview of sensors
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10 EDS94AYAB EN 2.1
Active sensors
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.
The outputs must switch simultaneously. Nevertheless, safety functions will be activated
as soon as at least one channel is switched.
Examples of active sensors:
ƒ Lightgrid
ƒ Laser scanner
ƒ Control