PRELIMINARY:
Model SK-FFT Manual — P/N 54711:B2 12/18/2020
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Wiring Requirements for the Audio Telephone Circuit
Audio Phone Circuit Installation
5.3.3 Multi-Phone Jack Audio Circuit Wired in Class B Configuration
For information on the wiring specifications, see section 5.3.1. Figure 5.4 illustrates how to wire the Multi-Phone Jack audio circuit (Class
B) and SLC for (Class B) configuration. In the Multi-Phone Jack configuration, the maximum mini-monitor contact wiring resistance
between to first and last FPJ must be less that 100 ohms.
Figure 5.4 Multi-Phone Jack Audio Circuit Wired in Class B
Caution!
For System Supervision-For Terminals 2 and 3, do not use
looped wire under the terminals. Break wire run to provide
supervision of communications.
4.7K W, 1/2 watt ELR (Install on
the last device for Class B
telephone circuit only).
