LS-20 Instruction Manual
00629-53-000
Page 8 of 18
Issue 12 19 January 2021
Interlock
Output
+24V
+24V
+12V
+12V
0V
0V
DC
POWER
OUT
Interlock System ICS-5
Control 24V
Monitor 24V
0V
LS-20 Shutter
OUTPUT
MONITOR
1
1
2
2
Monitor Contact 1 ‘Closed’
Monitor Contact 1 Common
Monitor Contact 2 ‘Closed’
Monitor Contact 2 Common
Diagram 2: Implementing a SIL-3 system using ‘SIL3’ LS-20
Note for correct operation, installation wiring should use at least 16/0.2mm wire to avoid problems
of voltage drop on the wiring run. On very long distances, when using ‘SIL3’ shutters, or in situations
where two shutters may be connected simultaneously 24/0.2mm wire may be advisable for the 24V
supply wires.
