IFP-FFT Manual — P/N 54708:B3 10/28/2021 25
Wiring Requirements for the Audio Telephone Circuit Audio Phone Circuit Installation
5.2.5 Telephone Jack Only Audio Circuit
The FFT can also be configured using only the FFT-FPJ. In this configuration, the IFP-MINIMON module is not required for system opera-
tion. To configure the FFT for telephone jack only, DIP Switch position 1 must be off (SLC Devices not Installed). See Table 3.1.
Figure 5.6 and Figure 5.7 show audio wiring for this configuration.
1 3
2 2
3 1
TB2
TB1
1 3
2 2
3 1
TB2
TB1
1 3
2 2
3 1
TB2
TB1
SLC O UT
+
–
+
–
+
+
PHO NE
–
SLC
IN PH O N E IN
–
OUT
Do not loop wire under the terminals.
Break wire run to provide proper
supervision of communications.
4.7kΩ, 1/2 watt ELR
Install on the last
device on a Class B
telephone circuit only.
Figure 5.6 Telephone Jack Only Audio Circuit Wired in Class B Configuration
+ audio
- audio
IFP-FFT
FFT-FPJ
FFT-FPJ
FFT-FPJ