5
FFT-1000 INSTALLATION MANUAL-5409205-REV A 4/21
P-Link
The FFT-1000 can operate as a standalone system or it can operate in conjunction as an expansion device with the
IPA-4000V via P-Link.
All expansion devices are supervised via the RS-485 connection. Wiring is fully supervised, and power limited. Any
connection to ground of 0 ohms will be annunciated as a ground fault.
P-Link Voltage
= 24 VDC
Maximum wire length
= 6,500 feet.
Maximum wire resistanc
e = Maximum wiring resistance is based on load.
Calculate using the following equation
(Total P-Link Alarm Current) x (Wire Resistance) < 6 volts.
Figure 5. P-Link Class B and Class A Example
F-Link and VOICE
The F-LINK is a proprietary communication bus to interface exclusively to the FFT-EXP to add additional phone
circuits. Wiring is fully supervised, and power limited. Any connection to ground of 0 ohms will be annunciated as
a ground fault. F-Link and VOICE connections between the FFT-1000 and FFT-EXP must be within 20' and run in
conduit.
F-Link Voltage
= 24V
Maximum wire length
= 20 feet
