
KA-B2
WIRING ADAPTER FOR 
USE WITH FIRST ALERT® 
AND BRK® WIRING HARNESS
User Guide
IMPORTANT! READ ALL INSTRUCTIONS BEFORE INSTALLATION 
AND KEEP THIS GUIDE FOR FUTURE REFERENCE. 
Read and become familiar with the user guide and all other literature 
supplied with each alarm in your home.
!
WARNING! If the power harness currently wired into the structure 
does not match the photo in FIGURE 1, this is not the correct wiring 
adapter for your application. This Connector Must Have An Orange 
Interconnect Wire.
THIS ADAPTER CAN ONLY BE USED WHEN REPLACING FIRST 
ALERT® AND BRK® MODELS; SA4121B, 4120, 4919, 5919, 
AND 86RAC WITH PLUG-IN CONNECTOR, MANUFACTURED 
BEFORE JUNE 1, 2003. THESE MODELS HAVE BEEN TESTED 
FOR INTERCONNECT COMPATIBILITY WITH THE KIDDE ALARM 
MODELS: 1235, 1275, 1276, 1285, i12020, i12020A, i12040, 
i12040A, i12060, i12060A, i12080, i12080A, i4618, i4618A, i4618AC,  
KN-SMFM-I, RF-SM-ACDC, PE120, P12040, Pi2000, Pi2010, KN-COSM-I,  
KN-COSM-IB, KN-COSM-IBA, KN-COPE-I, KN-COPE-IC, i12010S, 
i12010SCO, P4010ACSCO, P4010ACSCO-W, P4010LACS-W, P4010ACS, 
P4010ACS-W.
FIGURE 1 FIGURE 2
This smoke alarm adapter allows the installation of new Kidde alarm to 
existing First Alert® and BRK® wiring harnesses. When using this adapter, 
the power harness supplied with your new Kidde alarm is not used. You will 
need to remove the existing First Alert® or BRK® mounting plate and install 
the mounting plate supplied with your new Kidde alarm. Connect the KA-B2 
adapter to the First Alert® or BRK® wiring harness. To install the adapter, 
pinch the tabs on the side and insert into the opening of your Kidde unit 
(FIGURE 2). Secure the Kidde alarm to the mounting plate.
After installation, be sure that the AC power indicator is operating and test 
all your alarms following the instructions supplied by the alarm manufacturer 
for your specic alarm model. If the alarms are interconnected push the test 
button on each alarm and verify that all the interconnected alarms sound 
when any alarm is activated. The interconnect system should not exceed 
the NFPA interconnect limit of 12 smoke alarms.
             FIVE YEAR LIMITED WARRANTY
KIDDE Safety warrants the original purchaser that the enclosed smoke alarm 
adapter will be free of defects in material and workmanship or design under 
normal use and service for a period of ve years from the date of purchase. 
The obligation of KIDDE Safety under this warranty is limited to repairing or 
replacing the smoke alarm adapter which we nd to be defective in material, 
workmanship or design, free of charge to the customer, upon sending the 
smoke alarm adapter with proof of date of purchase, postage and return 
postage prepaid to: Warranty Service Department, Kidde Safety, 1394 South 
Third St, Mebane, NC 27302. 
THE LIABILITY OF KIDDE SAFETY OR ANY OF ITS PARENT OR 
SUBSIDIARY CORPORATIONS ARISING FROM THE SALE OF THIS SMOKE 
ALARM ADAPTER OR UNDER THE TERMS OF THIS LIMITED WARRANTY 
SHALL NOT IN ANY CASE EXCEED THE COST OF REPLACEMENT OF 
THE SMOKE ALARM ADAPTER AND IN NO CASE SHALL KIDDE SAFETY 
OR ANY OF ITS PARENT OR SUBSIDIARY COPORATIONS BE LIABLE 
FOR CONSENSEQUENTIAL LOSS OR DAMAGE RESULTING FROM THE 
FAILURE OF THE SMOKE ALARM ADAPTER OR THE BREACH OR THIS OR 
ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, EVEN IF THE LOSS 
IS CAUSED BY THE COMPANIES NEGLIGENCE OR FAULT.
Since some states do now allow limitations on the duration of an implied 
warranty or do not allow the exclusion of limitations or incidental or 
consequential damages, the above limitation or exclusions may not apply to 
you. While this warranty gives you specific legal rights, you may also have 
other rights, which vary, from state to state. The above warranty may not be 
altered except in writing signed by both parties hereto.
Since some states do now allow limitations on the duration of an implied 
warranty or do not allow the exclusion of limitations or incidental or 
consequential damages, the above limitation or exclusions may not apply to 
you. While this warranty gives you specific legal rights, you may also have 
other rights, which vary, from state to state.
The above warranty may not be altered except in writing signed by both parties 
hereto.
QUESTIONS OR FOR MORE INFORMATION
Call our Consumer Hotline at
1-800-880-6788
Or contact us at our web site www.kidde.com
Made in China
FIRST ALERT ® is a registered trademark of First Alert Trust. 
BRK® is a registered trademark BRK Brands Inc.
1275-7246-00

KA-F2
WIRING ADAPTER FOR 
USE WITH FIREX® WIRING HARNESS
User Guide
The Kidde and Firex alarm models listed in this user guide have been 
tested to be interconnect compatible. That compatibility exists with or 
without the use of the wiring harness adapters.
IMPORTANT! READ ALL INSTRUCTIONS BEFORE INSTALLATION AND
KEEP THIS USER GUIDE FOR FUTURE REFERENCE.
Read and become familiar with the user guide and all other literature 
supplied with each alarm in your home.
!
Warning! If the power harness currently wired into the structure 
does not match the photo in FIGURE 1, this is not the correct wiring 
adapter for your application.
THIS ADAPTER CAN ONLY BE USED WHEN REPLACING 
FIREX® MODELS; FADC, ADC, AND AD. THESE MODELS HAVE 
BEEN TESTED FOR INTERCONNECT COMPATIBILITY WITH 
THE KIDDE ALARM MODELS: 1235, 1275, 1276, 1285, i12020, 
i12020A, i12040, i12060, i12060A, i12080, i4618, i4618A, i4618AC,  
KN-SMFM-I, PE120, Pi2000, KN-COSM-I,  
KN-COSM-IB, KN-COSM-IBA, KN-COPE-I,   
 i12010S, i12010SCO, P4010ACSCO, P4010ACSCO-W, P4010LACS-W, 
P4010ACS, P4010ACS-W.
FIGURE 1 FIGURE 2
This smoke alarm adapter allows the installation of new Kidde alarm to 
existing Firex® wiring harnesses. When using this adapter, the power 
harness supplied with your new Kidde alarm is not used. You will need 
to remove the existing Firex® mounting plate and install the mounting 
plate supplied with your new Kidde alarm. Connect the KA-F2 adapter 
to the Firex® wiring harness then attach your Kidde alarm to the adapter  
(FIGURE 2). Secure the Kidde alarm to the mounting plate.
After installation, be sure that the AC power indicator is operating 
and test all your alarms following the instructions supplied by the 
alarm manufacturer for your specic alarm model. If the alarms are 
interconnected push the test button on each alarm and verify that all 
the interconnected alarms sound when any alarm is activated. The 
interconnect system should not exceed the NFPA interconnect limit of 
12 smoke alarms.
Each alarm shall be installed and tested in accordance with its user 
guide.
             FIVE YEAR LIMITED WARRANTY
KIDDE Safety warrants the original purchaser that the enclosed smoke alarm 
adapter will be free of defects in material and workmanship or design under 
normal use and service for a period of ve years from the date of purchase. 
The obligation of KIDDE Safety under this warranty is limited to repairing or 
replacing the smoke alarm adapter which we nd to be defective in material, 
workmanship or design, free of charge to the customer, upon sending the 
smoke alarm adapter with proof of date of purchase, postage and return 
postage prepaid to: Warranty Service Department, Kidde Safety, 1394 South 
Third St, Mebane, NC 27302. 
THE LIABILITY OF KIDDE SAFETY OR ANY OF ITS PARENT OR 
SUBSIDIARY CORPORATIONS ARISING FROM THE SALE OF THIS SMOKE 
ALARM ADAPTER OR UNDER THE TERMS OF THIS LIMITED WARRANTY 
SHALL NOT IN ANY CASE EXCEED THE COST OF REPLACEMENT OF 
THE SMOKE ALARM ADAPTER AND IN NO CASE SHALL KIDDE SAFETY 
OR ANY OF ITS PARENT OR SUBSIDIARY COPORATIONS BE LIABLE 
FOR CONSENSEQUENTIAL LOSS OR DAMAGE RESULTING FROM THE 
FAILURE OF THE SMOKE ALARM ADAPTER OR THE BREACH OR THIS OR 
ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, EVEN IF THE LOSS 
IS CAUSED BY THE COMPANIES NEGLIGENCE OR FAULT.
Since some states do now allow limitations on the duration of an implied 
warranty or do not allow the exclusion of limitations or incidental or 
consequential damages, the above limitation or exclusions may not apply to 
you. While this warranty gives you specific legal rights, you may also have 
other rights, which vary, from state to state. The above warranty may not be 
altered except in writing signed by both parties hereto.
Since some states do now allow limitations on the duration of an implied 
warranty or do not allow the exclusion of limitations or incidental or 
consequential damages, the above limitation or exclusions may not apply to 
you. While this warranty gives you specific legal rights, you may also have 
other rights, which vary, from state to state.
The above warranty may not be altered except in writing signed by both parties 
hereto.
QUESTIONS OR FOR MORE INFORMATION
Call our Consumer Hotline at
1-800-880-6788
Or contact us at our web site www.kidde.com
FIREX® is a registered trademark of United Technologies Corporation
Made in China