Potter PFC-6075 - Manual (Page 36)

3-30
PFC-6075 • 5403593 • Rev C • 2/13
P-Link Devices
Accessory devices, such as remote and LeD annunciators, and a remote expander (RLY-5) are connected to the main control
panel utilizing the four-wire P-Link bus for power and communication. This panel supports a maximum of 64 P-Link devices,
which can be connected using a Class B or Class A wiring style (examples are provided throughout this topic).
Note: If you have chosen to install an optional PSN-1000/PSN-1000(e) power expansion board, refer to Section 6:
PSN-1000/PSN-1000(E) – Installing, Operating & Programming, for instructions on installing this appliance.
Configuration Characteristics
P-Link current rating is one (1) amp. y y
P-Link voltage rating is 24 vDC. y y
The maximum wire length is 6,500 feet. y y
Maximum Wire Resistance Formula
The maximum resistance is based on the load placed on the circuit. To calculate the maximum wire resistance, use the following
formula:
(Total Annunciator Alarm Current) x (Wire Resistance) < 6 Volts
P-Link Class B Wiring Example Figure 30.
To the next device
-
+
A
B
Expansion
Device
-
+
A
B
P-LINK
- + A B
Panel
Connection
Expansion
Device
DWG #602-11A