Use and Care Manual
19
NOTE: Use standard UL Listed household wire (as required by local codes) available at all electrical supply 
stores and most hardware stores.
NOTE: AC power should be turned off at this stage.
 • After selecting the proper location for your Alarm, and wiring the AC 
QUICK CONNECT harness as described in the WIRING INSTRUCTIONS, 
attach the mounting bracket to the electrical box. To ensure aesthetic 
alignment of the alarm with the hallway, or wall, the “A” line on the 
mounting bracket must be parallel with the hallway when ceiling mount-
ed, or horizontal when wall mounted.
 • Pull the AC QUICK CONNECTOR through the center hole in the mounting 
bracket and secure the bracket, making sure that the mounting screws are 
positioned in the small ends of the keyholes before tightening the screws. 
Additional
Alarm
REDBLACK
WHITE
Additional
Alarm
RED
BLACK
WHITE
FUSE OR CIRCUIT BREAKER
REDBLACK
WHITE
Kidde Relay Module
SM120X, CO120X
or both 
Optional 
Accessory
First
Alarm
Figure 10-A, Interconnect Wiring Diagram
Existing Kidde 
AC Connector 
(either connector 
can be used for 
this model)
AC connector
shipped with 
product
AC connector
  Wires on alarm harness:  Connected to: 
  Black:  Hot side of AC line 
  White:  Neutral side of AC line 
  Red:  Interconnect lines (red wires) of other 
    units in the multiple station set-up
Figure 10-B










