HPFF8(E)/HPFF8CM(E) NAC Expander — P/N 53499:B4 10/1/2018 35
Section 5: Applications
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.
Notes for Figure 5.1:
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”.
2. The FACP’s NAC circuit can be steady on, coded, temporal, Sync, etc.
3. The value of the ELR (End-of-Line Resistor) across TB3 terminals SIGNAL 2 +OUT & -OUT depends on the FACP used.
4. For a list of compatible devices, refer to the HPP Device Compatibility Document.
5. The same gauge wire must be used if two conductors are connected to the same terminal of any terminal block.
6. 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.
SW1-8
OFF
SW1-7
N/A
SW1-6
OFF
SW1-5
OFF
SW1-4
OFF
SW1-3
OFF
SW1-2
OFF
SW1-1
OFF
All four NAC outputs will follow FACP output. FACP output can be steady on, coded, temporal, sync, etc.
TB3
TB4TB1
TB2
SW2
LEDs
REF+ REF– + IN – IN
+ OUT
– IN
+ OUT+ OUT
+ IN
– OUT
SIGNAL 1
SIGNAL 2
BATT+ BATT–
A+
N/O
N/C
COMM
N/O
N/C
COMM
AC FAIL
TROUBLE
J1
J2
1L1 1L2 2L1 2L2
3L1 3L2
4L1 4L2A–
FF8-4nacs-ss.wmf
Alarm Polarity
Shown
Figure 5.1 Controlling Four NAC Circuits from a Single Source
NAC Output
from FACP
Ref +
Ref -
In #1 +
In #1 -
Out #1 +
Out #1 -
In #2 +
In #2 -
Out #2 +
Out #2 -
ELR
Ref
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