Reset Function; Electrical Connection - Pepperl+Fuchs AL20 Mode D'emploi

Elevator Light Grid AL20/AL40

RESET function

20 RESET function
The light grid also contains various pieces of information when the power supply is inter-
rupted. The RESET function gives the user the possibility of resetting all internal perma-
nent memory units to the state they were in when the equipment left the factory. This
state is dark switching. You can trigger a RESET by holding the magnet against the Reed
contact for longer than 40 seconds.
21 Test input
You can turn off the light beams that are used for detection by applying a positive voltage
within the range of +5V to +UB to the test input, i.e. the outputs of the light grid will react
as they do when an object is detected.
To reliably prevent interference (EMC, couplings), the test input should
never remain unconnected to the circuit! If the test input is not required,
it should be connected with 0V.
22

Electrical connection

22.1 Connection with a fixed cable 5m
The electrical connection is made with a fixed cable 5000 mm long (drag chain cable)
with open numbered wire ends.
Option:
1 +UB
2 0 V
Q2
3
4 Q1
22.2 Connection with connector M12
Option:
+UB
1
2 Q2
3 0 V
Q1
4
Receiver Emitter
OFF
ON
Test
Test input should
not be unconnec-
ted!
Receiver Emitter
ON
OFF
Test
Test input should
not be unconnec-
ted!
13