26
HPF24S Series Power Supplies —
P/N 52751:D3 5/11/2010
Trouble Supervision
AC Loss Reporting Delay
•
With SW1 switch 4 set to the ON position, AC Fail/brownout reporting will be delayed 2 hours
and the following trouble conditions will cause the normally energized trouble relay to change
states regardless of whether the panel is in alarm or standby:
– An AC fail condition at the power supply
– A battery fail condition at the power supply
– A battery charger fail on the power supply
– A ground fault condition on the power supply (zero impedance between the power supply
and ground)
– A field wiring fault on the NAC output of the power supply. (If the panel is in alarm, only a
short circuit on the NAC will be detected and indicated as a trouble).
With SW1 switch 4 set to the OFF position, AC fail/brownout reporting will occur
immediately and the Aux. Trouble Relay will change state
only
for AC fail/brownout
conditions. A monitor module can be used to monitor relay.
4.2 AC Loss Reporting Delay
The reporting of AC loss to a central station is usually delayed in order to prevent multiple
transmissions of AC loss and restoral, thus allowing AC power to stabilize. When a host FACP is
programmed to delay AC loss reporting, the HPF24S must be configured to delay the reporting of
AC fail. This is accomplished by setting SW1 DIP switch 4 to the ON position. This will prevent
AC loss from being reported as a trouble condition for two hours.
Note that the HPF24S power supply will immediately indicate loss of AC power by turning off the
AC Power LED and turning on the Charger Trouble/AC Loss LED, regardless of the setting of SW1
DIP switch 4.
NOTE:
the NAC Trouble LED will indicate which NAC circuit is in trouble by blinking once for Circuit 1,
twice for Circuit 2, three times for Circuit 3 and four times for Circuit 4. If more than one circuit is in
trouble, the LED will blink the circuit numbers in sequence.
SLC
Monitor Module*
Aux. Trouble Relay
Monitor Module ELR
HPF24S6/8
7
6
NO
NC
*If the SLC device does not match
the one in this figure, refer to the
SLC manual appendix, which con-
tains wiring conversion charts for
type V and type H modules.
