3: Mixing Class B And Class A Nacs - Honeywell HPFF12 Installation And Operation Manual

Installation
2.3.3 Mixing Class B and Class A NACs
Figure 2.12 shows two NACs configured for Class B (Style Y) and one NAC configured for
Class A (Style Z).
• Trouble on NAC1
will illuminate
LED1 SIG1 TRBL
• Trouble on NAC2
will illuminate
LED2 SIG2 TRBL
• Trouble on NAC3
will illuminate
LED3 SIG3 TRBL and
LED4 SIG4 TRBL
Figure 2.12 Configuring Two Class B NACs and One Class A NAC on One HPFF
NOTE:
1. Typical ELR's 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.
28
NAC 1 NAC 2
NOTE: NAC 1 and NAC 2 in
Class B (Style Y) - See
Section 2.3.1 for wiring.
Reference Resistor
(Same as ELRs for
NAC 1 & NAC2)
Horn Strobe
Horn Strobe
Horn Strobe
NAC 3
Note: NAC 3 in Class A;
no ELR required.
HPFF12 NAC Expander — P/N 53576:B 11/24/2010
NAC Circuit Wiring
Alarm Polarity
Shown