HPF24S Series Power Supplies — P/N 52751:E1 4/14/2011 27
Section 5: Applications
5.1 Controlling Four NACs With One Input and Selective
Silence
In this application, the power supply has been set as a master with synchronized outputs and selec-
tive silence (see SW1 switch settings in following illustration). All four HPF24S output circuits,
which are shown as NACs (Notification Appliance Circuits), can be controlled from one input such
as an addressable control module as illustrated in Figure 5.1. The control module can be powered
from the HPF24S auxiliary 24 VDC power output (TB4, Terminals 9 & 10) and supervised by an
EOL relay. An addressable relay module, programmed as an alarm output and a silenceable point,
can be used as a selective silence input.
NOTE: The Relay Module is required only for this application with the power supply set as Master.
If the power supply is set as Slave, the Relay Module is not required. In Slave mode, selective
silence (horn mute) is provided by the FACP through the sync input.
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