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Trouble Supervision AC Loss Reporting Delay

24 FCPS-24S PN 51977:C1 08/06/03

4.1.3 Trouble Relay

The FCPS-24S power supply has one fail-safe Form-C trouble relay located at TB5.

The contacts can be monitored by an FACP input circuit or an addressable monitor

module. 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

• A field wiring fault on the NAC output of the power supply

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

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 FCPS-24S 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 eight hours.

In the event that an immediate indication of AC loss is required at a control panel

programmed for AC loss reporting delay, the FCPS-24S can be monitored by

connecting the primary AC power from a single AC mains circuit breaker to both the

host FACP and FCPS-24S power supply. In this way, AC loss for both the control

panel and power supply is monitored by the control panel, which will give an

immediate indication when AC power fails.

Note that the FCPS-24S 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.

Notifier FCPS-24S8 User Manual

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