4: Multi-Phone Jack Audio Circuit In Class A Configuration - Honeywell Farenhyt Series Manual

Firefighter's telephone
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Audio Phone Circuit Installation
5.2.4 Multi-Phone Jack Audio Circuit in Class A Configuration
For wiring specifications, refer to Section 5.2. Figure 5.5 illustrates how to wire the multi-phone jack audio circuit and the SLC in Class A
configuration. In the multi-phone jack configuration, the maximum mini-monitor contact wiring resistance between the first and last FFT-
FPJ must be less that 100 ohms.
+ SLC in
- SLC in
+ SLC out
- SLC out
IFP-FFT
24
Contact EOL Not Connected
(See Figure 5.2 for EOL reference.)
+ audio in
- audio in
+ audio out
- audio out
1 3
2 2
3 1
TB1
TB2
FFT-FPJ
ADDRESS
LOOP
TENS
ONES
IFP-MINIMON
Figure 5.5 Multi-Phone Jack Audio Circuit Wired in Class A Configuration
Class A wiring
1 3
1 3
2 2
2 2
3 1
3 1
TB1
TB1
TB2
TB2
FFT-FPJ
FFT-FPJ
1 3
2 2
3 1
TB2
FFT-FPJ
ADDRESS
TENS
IFP-MINIMON
Wiring Requirements for the Audio Telephone Circuit
Contact EOL Connected
(See Figure 5.2 for EOL reference.)
Do not loop wire under the terminals.
Break wire run to provide proper
supervision of communications.
Contact EOL Not Connected
(See Figure 5.2 for EOL reference.)
1 3
2 2
3 1
TB1
TB1
TB2
FFT-FPJ
LOOP
ONES
IFP-FFT Manual — P/N 54708:B3 10/28/2021
1 3
2 2
3 1
TB1
TB2
FFT-FPJ

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