Potter PFC-6075R - Manual (Page 114)

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PFC-6075R • 5403594 • REV D • 9/14
Notification Appliance Circuits (NACs)
There are six (6) NAC circuits provided on the PSN-1000/PSN-1000(E) rated as continuous 3 amps at 24 VDC. The NAC
circuits may be configured for Class A or Class B. (Please refer to the Class A and B wiring examples shown in this section.)
The circuits reverse polarity upon activation and are marked accordingly on the board and illustrations.
NAC Wiring
• Outputs are supervised and regulated.
• NAC circuits are power limited.
• Type of NAC output is selectable, and may be configured for strobe synchronization with Potter/AMSECO, Wheelock®,
Gentex®, or System Sensor® strobe devices. Please refer to Potter document “5403592 NAC Compatibility Document”
for this information.
• Class-A operation is accomplished by using a pair of NAC circuits (NAC 1&2, NAC 3&4 and NAC 5&6); this pairing
provides three (3) Class A circuits, each rated for a continuous 3 amps at 24 VDC.
NAC Maximum Impedance Formula
The maximum impedance is a function of the load being applied to the circuit. In order to calculate the maximum impedance as
follows:
(Alarm Current of Notification Appliances) x (Wire Resistance) < 3 Volts
NAC Wiring Configurations
Examples of Class A and B follow.
Figure 149. Class B NAC Wiring Example
Notes:
1. The Potter part number for the listed end of line assembly is #3005013 EOL Resistor Assembly.
2. The panel has ground fault detection on the NAC circuits. The impedance to ground for ground fault detection is 0 ohms.
- I1 + - NAC 1 + - NAC 5 + - NAC 3 +
-
+ A B
5.1k EOL
Potter Part #3005013
Notification
Appliance
- I2 + - NAC 2 + - NAC 4 + - NAC 6 +
-
+ A B
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