Connecting Multiple Units - Honeywell HPFF12 Instruction Manual

Connecting Multiple Units

5.4 Connecting Multiple Units
Two or more HPFF12 and/or HPFF8 units can be connected to each other to provide additional NAC extenders for a system; see wiring
in Figures 5.5–5.10 and in the HPFF8 manual PN 53499. Maintain separation of power-limited and non-power limited wiring as dis-
cussed in Section 2.5, "Power-Limited Wiring Requirements".
NOTE: Multiple units should not be connected in a "daisy chain" fashion. DO NOT connect a NAC output of one unit to the initiating device
signal input of the next unit. The synchronization signal will not pass unimpeded through multiple units with this wiring method.
FACP
conventional
TB2
LEDs
HPFF12 Sync
Generator or
Pass-Through
(Slave)
J1
(filtered if
FWR input)
TB1 TB4
A+ A– 1L1 1L2 2L1 2L2 3L1 3L2 4L1
BATT+ BATT–
NAC Outputs
to NACs
Remote Sync or NAC
TB2
LEDs
HPFF12
Pass-Through
(Slave)
J1
(filtered if
FWR input)
TB1 TB4
A+ A– 1L1 1L2 2L1 2L2 3L1 3L2 4L1 4L2
BATT+ BATT–
to NACs
Notes for Figures 5.5–5.10:
1. The FACP's NAC output must be regulated (not Full Wave Rectified [FWR]) if the HPFF is programmed for Sync Generator.
2. The number of possible units that can be interconnected depends on the current capability of the FACP output. Each HPFF12 input
draws 12.26 mA at 24 VDC.
3. The total line impedance for interconnected units cannot be such that it creates a voltage drop > 2 VDC.
Zline total =2V/(1 Unit + 1 ELR)
Example: Zline total = 2V/(12.26 mA + (24-2)/4.7K) =118.1 ohms
HPFF12 NAC Expander — P/N 53576:B3 10/1/2018
Remote Sync
or NAC Output
TB2
SW2
LEDs
HPFF12 Sync
TB3
Pass-Through
J1
ELR or to
next units
J2
TB1 TB4
4L2
BATT+ BATT–
NAC Outputs
Figure 5.5 Typical System Connections
Output with sync
TB2
SW2
LEDs
TB3
HPFF12
Pass-Through
(Slave)
J1
(filtered if
FWR input)
J2
TB1 TB4
A+ A– 1L1 1L2 2L1 2L2 3L1 3L2
BATT+ BATT–
NAC Outputs
to NACs
Figure 5.6 System Sync Connections
NAC Outputs
FACP
non-silenceable
conventional
silenceable
SW2
TB3
Generator or
(Slave)
(filtered if
FWR input)
ELRs or to
next units
J2
A+ A– 1L1 1L2 2L1 2L2 3L1 3L2 4L1 4L2
to NACs
TB2
SW2
LEDs
TB3
HPFF12
Pass-Through
(Slave)
J1
(filtered if
FWR input)
J2
TB1 TB4
4L1 4L2 A+ A– 1L1 1L2 2L1 2L2
BATT+ BATT–
NAC Outputs
to NACs
FACP
TB2
SW2
LEDs
HPFF12 Sync
TB3
Generator or
Pass-Through
(Slave)
J1
J2
TB1 TB4
A+ A– 1L1 1L2 2L1 2L2 3L1 3L2 4L1 4L2
BATT+ BATT–
NAC Outputs
to NACs
TB2
SW2
LEDs
TB3
HPFF12
Pass-Through
(Slave)
J1
(filtered if
FWR input)
J2
TB1 TB4
3L1 3L2 4L1 4L2 A+ A– 1L1 1L2
BATT+ BATT–
NAC Outputs
to NACs
Applications
SLC
Control Module
(non-silenceable point)
ELRs
Relay Module
or to
(silenceable
next
point)
units
SW2
TB3
ELR or to
J2
next unit
2L1 2L2 3L1 3L2 4L1 4L2
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