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Control Panel Installation
4.12.3 NFPA 72 Polarity Reversal
Using the 5220 Module
When you wire and program the 5220 Module for polarity reversal, it reports alarm and trouble events to a remote site. Alarms will over-
ride trouble conditions and it will not be possible to reset the remote indicator until you clear the condition and reset the control panel.
If an alarm condition occurs, the alarm relay will close, overriding the trouble condition.
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Standby Current: 100 mA
To install the 5220 Module for polarity reversal, follow the steps below:
1.
Locate the knockout on the right side of the control panel cabinet. Using a short piece of conduit (it must not exceed 20 feet in
length) connect to the 5200 Module.
2.
Wire the 5220 to the control panel using the four-wire pigtail provided as shown in Figure 4.29. This diagram also shows how to
connect the 5220 to the remote indicator.
Do not install an EOL resistor in the terminals of the NAC circuit used for this application.
3.
Connect the Earth Ground wire to the 5220 chassis and insert with a mounting screw.
4.
Program the NAC circuit used as continuous and non-silencing. Refer to Section Section 7.5 for point programming, Section
Section 7.4 for group settings, and Section Section 7.3 for zone settings and mapping.
5.
If necessary, adjust the loop current using the potentiometer (R10) on the 5220 board.
Normal loop current is 2-to-8 mA with a 1k ohm remote station receiving unit. The Maximum loop resistance is 3k ohm.
Using the 7644-L8 Module
When you use the 7644-L8 Module for polarity reversal, it allows alarm and trouble events to be reported to a remote site. Alarms will
override trouble conditions and it is not possible to reset the remote indicator until you clear the condition and reset the control panel.
To Install the 7644-L8 Module for Polarity Reversal:
1.
Wire the 7644-L8 Module to the control panel as shown in Figure 4.30.
Do not install an EOL resistor on the terminals of the NAC circuit.
NOTE:
Use only NAC circuits on the control panel for reverse polarity.
2.
Program the NAC circuit as a notification circuit. See Section 7.5.2.
3.
Map the Group to activate non-silenceable, constant ON. This action is done in response to a system general alarm, and in response
to a system trouble.
4.
Intended for connection to a polarity reversal circuit of a remote station receiving unit with compatible ratings.
32
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Program Relay for Alarm
Note 1:
Max. Voltage: 27.4 VDC
Max. Current: 1 Amp
Note 2:
Use NAC circuit 1 and
Relay 2 as examples.
Use either NAC circuit
or Relay circuit.
Note 3:
This is not suitable for remote
station protected premises
services, where separate
transmission circuits are
required for fire supervisory (if
applicable) and trouble signals.
Figure 4.29 Polarity Reversal Connection Using the 5220 Module
Figure 4.30 Polarity Reversal Connection Using the 7644-L8
GWF-7075 Addressable Fire Alarm Control Panel Manual — P/N LS10147-002GF-E:E 06/11/2019
Alarm: 100 mA
All circuits Class A Power-Limited.
All wiring Supervised.
Remote Station Applications
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Max. Voltage: 27.4 VDC
Jumper terminals 3 & 4
when City Box is not used.
Remote
Indicator
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