Safety engineering
Basics
Overview of sensors
1
1.1
1.1.9
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.
Theoutputs mustswitchsimultaneously. 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 s ensors 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
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