Potter PFC-6075 - Manual (Page 108)

6-102
PFC-6075 • 5403593 • Rev C • 2/13
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.
Class B NAC Wiring Example Figure 140.
Notes:
The Potter part number for the listed end of line assembly is #3005013 eOL Resistor Assembly. 1.
The panel has ground fault detection on the NAC circuits. The impedance to ground for ground fault detection is 0 ohms. 2.
Figure 141.
- 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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