8
6.1 Protection against simple defeating
The fail-safe sensor reacts to metal objects, e�g� the frame of a safety door� Other
metal objects that are not intended to enable the sensor must not be allowed to
enable the fail-safe sensor unintentionally�
► Take measures to prevent metal objects, except the designated
target, from being placed on the sensing face or in the enable zone
unintentionally�
7 Electrical connection
► Disconnect power� Also disconnect any independently supplied relay load
circuits�
► Supply voltage: connect L+ to pin 1 and L- to pin 3 of the connector�
The nominal voltage is 24 V DC� This voltage may vary between 19�2 V and
30 V incl� 5 % residual ripple to EN 61131-2�
In case of a single fault the supply voltage must not exceed a maximum
of 40 V DC� (This requires the safe separation between power supply and
transformer�)
3
1
4
2
L
+
L
A2
A1
+24 V
IN1
GND
IN2
1
1: safety-related logic unit *
* When there is no current flow on the output stage, back feeding > 3�5 V will lead
to malfunction�
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