To Next Page

To Previous Page

28 HPFF12 NAC Expander — P/N 53576:B 11/24/2010

Installation NAC Circuit Wiring

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).

Figure 2.12 Configuring Two Class B NACs and One Class A NAC on One HPFF

NOTE: NAC 1 and NAC 2 in

Class B (Style Y) - See

Section 2.3.1 for wiring.

NAC 3

HPFF12NACClassAwithB.wmf

Horn Strobe

Alarm Polarity

Shown

Note: NAC 3 in Class A;

no ELR required.

NAC 1

• 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

Reference Resistor

(Same as ELRs for

NAC 1 & NAC2)

NAC 2

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.

Honeywell HPFF12 User Manual

Other manuals for Honeywell HPFF12