User Manual

Control Panel Installation 151274-L8
4-28
rent using the potentiometer (R10) on the 5220 board. Normal loop current is 2-to-8 mA with a 1k ohm
remote station protected premise unit. Maximum loop resistance is 3k ohm.
Figure 4-33 Polarity Reversal Connection Using the 5220 Module
4.13.3.2 Using the 7644-L8 Module
When the 7644-L8 is used for polarity reversal, it allows alarm and trouble events to be reported 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 control panel is reset.
To install the 7644-L8 for polarity reversal:
1. Wire the 7644-L8 to the control panel as shown in Figure 4-34. Do not install an EOL resistor on the termi-
nals of the NAC circuit used.
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 constant on from the zone event. See Section 7.3.1.3.
Note:
NAC circuit 1 and Relay 1
used as examples. Any
NAC circuit and either
relay 1 or relay 2 could
be used.
Intended for connection to a Polarity Reversal
circuit of a Remote Station receiving unit
having compatible ratings.