3-27
PFC-6075 • 5403593 • Rev C • 2/13
Reverse Polarity Communication Line Circuit
Only I/O 1 and I/O 2 on the PFC-6075 can be programmed as reverse polarity circuits. The short circuit current is rated at
24 VDC
and 14 mA maximum
. Please refer to the figure below for an example of wiring a reverse polarity communication line circuit.
Reverse Polarity Communication Line Circuit Wiring
Figure 26.
Notes
:
The panel has ground fault detection on reverse polarity circuits; impedance to ground for ground fault detection
1.
is 0 ohms.
The short circuit current is power limited and supervised by a Keltron TTM-RPS transmitter module.
2.
When configured for reverse polarity, the PFC-6075 will indicate alarm and trouble events to a remote site.
3.
The
4.
Alarms override
trouble conditions.
DWG #602-8A
Panel
Connection
I/O 1 I/O 2
-
+ -
+
Keltron
TTM-RPS
+
-
Note: IO circuit must configured as a Reverse Polarity circuit.
This connection is limited to same room installation . This connection shall be
limited to 20 feet and enclosed in conduit or equivalently protected against
mechanical injury .