Nac Circuit Wiring; 1: Four Nacs Configured For Class B (Style Y) - Honeywell HPFF12 Instruction Manual

Installation

2.3 NAC Circuit Wiring

For wiring sizes, see Section 6.5, "NAC Circuit Loop Wiring Requirements".
2.3.1 Four NACs Configured for Class B (Style Y)
Figure 2.10 shows four NACs configured for Class B (Style Y).
• Trouble on NAC1
will illuminate
LED1 SIG1 TRBL.
• Trouble on NAC2
will illuminate
LED2 SIG2 TRBL.
• Trouble on NAC3
will illuminate
LED3 SIG3 TRBL.
• Trouble on NAC4
will illuminate
LED4 SIG4 TRBL.
NOTES:
1. Typical ELRs for new installations can be 3.9k or 4.7k ohm.
2. The same gauge wire must be used if two conductors are connected to the same terminal of any terminal block.
3. Do not complete a continuous circuit around the screw terminal. There must be two separate wires on either side of the screw at the
terminal block. "T-tapping" is absolutely NOT ALLOWED.
20
TB2
LEDs
TB1 TB4
A+ A– 1L1 1L2 2L1 2L2
BATT+ BATT–
NAC 1 NAC 2
NACs 1 - 3 are wired the same as NAC4 and use
an ELR which is the same as Reference Resistor.
Figure 2.10 Four NACs in Class B (Style Y)
EOL same as
Reference Resistor
+
+
+
3L1 3L2 4L1 4L2
+
-
NAC 3
HPFF12 NAC Expander — P/N 53576:B3 10/1/2018
NAC Circuit Wiring
Reference Resistor
NAC 4
-
Horn Strobe
-
Horn Strobe
-
Horn Strobe
Alarm Polarity Shown