Reer PI M12 NF Manual De Instrucciones Original página 24

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.)
1: safety-related logic unit *
* When there is no current flow on the output stage, back feeding > 3.5 V will lead
to malfunction.
8
L +
1
+24 V
2 A1
IN1
1
3 L
GND
4 A2
IN2