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© 2017 United Technologies Corporation 

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P/N 3102475-EN • REV 001 • ISS 09NOV17 

 

                                                              

                                                 

 

 

KI-ABST Sounder Base 
Installation Sheet 

 

Description  

The KI-ABST sounder base adds alarm signaling capability to 
compatible single-function smoke detectors. See “Specifications” on 
page 3 for compatible detectors. 

The KI-ABST sounder base is field-configurable for a low dB or 
high dB output, and for a steady or temporal signal. See Figure 1. 

In temporal mode, the KI-ABST generates the required fire alarm 
signal and uses a separate synchronization module and polarity 
reversal relay for signal synchronization. See Figure 4. 

For application and programming details, refer to the control unit 
documentation. 

Installation 

Install and wire this device in accordance with applicable national and 
local codes, ordinances, and regulations. 

Cautions 

• 

To prevent accidentally alarming the system, disconnect the 
signaling line circuit (SLC) from the control unit before connecting 
this device. 

• 

Electrical supervision requires that you break the wire run at each 
terminal. Do not loop the field wires around the terminals. 

• 

Equipment damage hazard. Printed circuit boards are not field 
repairable. When configuring the sounder base, make sure you are 
cutting the correct location before you make the cut. 

• 

Equipment damage hazard. Overtightening the screw terminals 
can damage the terminal and make wire connections less secure. 
Tighten screws firmly, but do not overtighten. 

Notes 

• 

Always connect the base to a steady voltage, whether the output 
signal on the audible detector base is set to steady or temporal. 

• 

This device is prohibited from being installed in a dwelling unit as 
defined in the National Building Code of Canada. 

• 

For determining where to locate the sounder base, refer to the 
detector installation instructions. 

To install the sounder base: 

1.  Configure the sounder base. See Figure 1. 

To select a low dB output, cut the printed circuit board at J1. For a 
high dB output, leave J1 intact. 

To select a steady output, cut the printed circuit board at J2. For a 
temporal output, leave J2 intact. 

2.  Connect the field wiring to the terminals. Observe the signal 

polarity of the AUX riser (plus to minus and minus to plus). See 
Figure 3 and Figure 4. Do not overtighten the screws. 

3.  Attach the base plate to the electrical box. See Figure 5. Do not 

overtighten the screws. 

If you are using the AB4G-SB surface mount box, make sure to 
install a reinforcing plate at each knockout used. Reinforcing plates 
are included with the AB4G-SB. See Figure 2. 

4.  Align the trim ring so that the four tabs on the ring mate with the 

four slots in the base plate, and then press the trim ring onto the 
base plate until the tabs lock. 

Figure 1: Output configuration 

 

 
(1)  High dB, Temporal 
(2)  Low dB, Temporal 

 

(3)  High dB, Steady 
(4)  Low dB, Steady 

Figure 2: Installing reinforcing plates on the AB4G-SB box 

 

 

J1

J2

(1)

J1

J2

(2)

J1

J2

(3)

J1

J2

(4)

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