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Model 5207 Installation and Operation Manual
4.7.2
NFPA 72 Polarity Reversal
When the 5220 is wired and programmed for polarity reversal, it reports alarm and trouble
events to a remote site. Alarms will override trouble conditions and it will not be possible to
reset the remote indicator until the condition is cleared and the 5207 panel is reset.
If an alarm condition occurs, the alarm relay will close, overriding the trouble condition.
To install the 5220 for polarity reversal, follow the steps below:
1. Locate the knockout on the right side of the 5207 cabinet to connect the 5220 using a short
piece of conduit (must not exceed 20 feet in length).
2. Wire the 5220 to the 5207 using the four-wire pigtail provided as shown in Figure 4-8
(next page). This diagram also shows how to connect the 5220 to the remote indicator.
3. Program relays as shown in the chart below:
Step
Option
Select
23.4
23.5
23.6
Fire Alarm
Trouble
No Silence
Relay 2
Relay 3
Relay 3 and Bell 4
4. Program notification circuit 4 to be non-supervised (Step 5) and non-silencing (Step 23.6,
Bell #4). Do not select pulsing bells.
5. If necessary, adjust loop current using potentiometer R10 on the 5220 board. Normal loop
current is 4-to-8 mA with a 1k ohm remote station receiving unit. Maximum loop resistance is 3k ohm.
Figure 4-8 Polarity Reversal Connection
4-8
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