Audio Phone Circuit Installation; List Of Devices; Maximum Number Of Devices; Wiring Requirements For The Audio Telephone Circuit - Honeywell SILENT KHIGHT SK-FFT Installation And Operation Manual

Section 5

Audio Phone Circuit Installation

5.1

List of Devices

5.2

Maximum Number of Devices

The SK-FFT supports up to 48 zones. Each zone consists of one addressable
monitor module (SK-Minimon) and a minimum of one Fire Fighter Telephone Jack
(FFT-FPJ).
5.3 Wiring Requirements for the Audio Telephone
Circuit
The following information applies to the FFT-FPJ Fire Fighter Phone Jack.
5.3.1 Single Phone Jack Audio Circuit in Class B
Configuration
No special wire is required for the Audio Telephone Circuit. The wire can be
untwisted, unshielded, twisted or shielded as long as it meets the National Electric
code 760-51 requirements for power limited fire protective signaling cables.
54 Ohm maximum impedance - 12 to 18 AWG.
Twisted, shielded wire is recommended for maximum protection against EMI and AFI
emissions and susceptibility.
If using shielded cable, attach the shield to Grounding Stud below TB6 of the FFT.
Note: Do not ground shield on both ends.
54711
Part Number
FFT-FPJ
Description
Fire Fighters Telephone Jack
5-1