N\
O
C
OM
N\
C
-
+
Relay Contacts:
COM and N\C are connected
when ELK-912 is off (no trigger).
COM and N\O are connected
when ELK-912 is on.
Power Terminals:
Powers Relay Coil (12V, 30mA)
Connect to Trigger Output
ELK-912
ELK-912 APPLICATIONS AND WIRING DIAGRAMS
Example 2:
If control has a negative output,
connect the "+" terminal of the ELK-912 to the
control's +12V terminal. Connect the "-" termi-
nal of the ELK-912 to the negative alarm output.
Example 4:
ELK-912 used to switch a high-
current siren or bell from separate power supply.
N\O
C
O
M
N\C
-
+
Control Panel
+12V Aux.
+ Alarm Output
Ground (-)
ELK-912
Floodlight
120V
AC
Alarm-Activated Floodlight
Example 3:
Floodlight activates whenever con-
trol panel is in alarm
N\
O
C
O
M
N\
C
-
+
Control Panel
+12V Aux.
+ Alarm Output
Ground (-)
ELK-912
12V Power Supply
-
-
+
+
High-Current Bell or Siren Switch
Bell or
Siren
Example 1:
If control has a positive output,
connect the "-" terminal of the ELK-912 to the
control's ground terminal. Connect the "+"
terminal of the ELK-912 to the positive alarm
output.
N\O
C
O
M
N\C
-
+
Control Panel
+12V Aux.
+ Alarm Output
Ground (-)
These Contacts
are Connected
when Relay is
Activated
ELK-912
Hookup Example for a Positive-Output
Control Panel.
ELK-912
N\O
C
O
M
N\C
-
+
Control Panel
+12V Aux.
- Alarm Output
Ground (-)
These Contacts
are Connected
when Relay is
Activated
Hookup Example for a Negative-Output
Control Panel
