Split Alarm And Selective Silence; 1: Selective Silence - Honeywell HPFF12 Installation And Operation Manual

Applications

5.3 Split Alarm and Selective Silence

Selective silence can only be accomplished if the sync protocol from the FACP is passed through
the HPFF unit, which is configured for Split Alarm. The selective silencing is accomplished in
pairs of NACs 1&2 and 3&4.
5.3.1 Selective Silence
In this application, the power supply and FACP have been configured for selective silence as
illustrated in Figure 5.3. The sync protocol has to be passed through the HPFF unit from the FACP
to selectively silence the NACs. The FACP must be capable of a visual annunciation to the
silencing status of the output or zone(s) to which the HPFF unit(s) are connected.
If the Programming DIP Switches are set as shown below, all four NACs will follow (Pass-through)
the signal from the FACP including which NAC output pair will be silenced.
SW1-8
ON
NAC 1 & 2 will NOT be silenced; NAC 3 & 4 will be silenced.
Two independent inputs are required for silencing. Two separate addressable modules can be used
as shown in Figure 5.2, mounted on the control board (one on the other) or in a separate UL-Listed
panel. Alternately, two outputs of a six-output addressable module can also be used and mounted
on the Control board as shown in Figure 5.4.
Notes for Figure 5.3:
1. When the power supply is in normal/standby state, a trouble will result in an open circuit condition on the
control module output circuit (monitored by the End-of-Line Resistors on TB3). The HPFF's alarm 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 NAC outputs must be programmed as a silenceable points and the HPFF8 programmed for
Selective/Split Alarm to allow selective silence of horn/strobe devices.
3. The value of the ELRs (End-of-Line Resistors) on TB3 depends on the FACP used.
4. For a list of compatible devices, refer to Appendix A, "Device Compatibility".
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.
44
SW1-7 SW1-6 SW1-5
NA OFF OFF
Figure 5.3 Wiring for Selective Silence
Split Alarm and Selective Silence
SW1-4 SW1-3
OFF OFF
Class B NAC output
from FACP or Sync Module:
Non-Silenceable Point
Activated by Alarm
Class B NAC output
from FACP or Sync Module:
Silenceable Point
Activated by Alarm
HPFF12 NAC Expander — P/N 53576:B 11/24/2010
SW1-2 SW1-1
OFF ON
Alarm Polarity
Shown