Section 5: Applications; Controlling Four Nac Circuits From A Single Source - Honeywell HPFF8 Instruction Manual

Notification appliance circuit expander

Table of Contents

5.1 Controlling Four NAC Circuits from a Single Source

In this application, all four NACs (Notification Appliance Circuits) are controlled by a single input from a FACP (Fire Alarm Control

Panel) as illustrated in Figure 5.1. The FACP could be replaced by a supervised addressable control module associated with a fire alarm

control panel.

If the Programming DIP Switches are set as shown below, all four NACs will follow (Pass-through/Slave) the signal from the FACP.

SW1-8

OFF

All four NAC outputs will follow FACP output. FACP output can be steady on, coded, temporal, sync, etc.

LEDs

Notes for Figure 5.1:

When the power supply is in normal/standby state, a trouble will result in an open circuit condition on the FACP's NAC circuit

(monitored by End-of-Line Resistor across TB3). The HPFF's alarm input circuit will always remain closed in the alarm state.

Therefore, the Trouble contacts at TB2 need to be used to report troubles to the FACP during an alarm. See Section 4.1, "Supervised

Functions and Field Wiring".

The FACP's NAC circuit can be steady on, coded, temporal, Sync, etc.

The value of the ELR (End-of-Line Resistor) across TB3 terminals SIGNAL 2 +OUT & -OUT depends on the FACP used.

For a list of compatible devices, refer to the HPP Device Compatibility Document.

The same gauge wire must be used if two conductors are connected to the same terminal of any terminal block.

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.

HPFF8(E)/HPFF8CM(E) NAC Expander — P/N 53499:B4 10/1/2018