Honeywell HPFF12 Operation Manual - Page 28
Mixing Class B and Class A NACs,
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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). • 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) HPFF12NACClassAwithB.wmf Horn Strobe Horn Strobe Horn Strobe NAC 1 NAC 2 NOTE: NAC 1 and NAC 2 in Class B (Style Y) - See Section 2.3.1 for wiring. NAC 3 Note: NAC 3 in Class A; no ELR required. Alarm Polarity Shown 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 HPFF12 NAC Expander - P/N 53576:B 11/24/2010