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LS10143-001SK-E
4.15.5.1 Door Holder Power
Door holder power is intended for fire door applications. When there are no fire system alarms in the system and
the panel has AC power, door holder circuits have 24 volt power present at their terminals. Any fire system alarm
will cause power to disconnect. Power will be re-applied when the fire system is reset. If AC power is not
present, the auxiliary door holder power will be disconnected to conserve the battery backup. When AC power is
restored, power is immediately restored to the door holder circuits.
Use a UL listed door holder such as ESL DHX-1224, for this application. See Table A-4 for compatible door
holder list.
4.15.5.2 Constant Power
Use constant power for applications that require a constant auxiliary power source. Power is always present at
constant circuits.
4.15.5.3 Resettable Power
Resettable power is typically used to power beam detectors, flame detectors and conventional 4-wire smoke
detectors. For circuits selected as Resettable, 24 volt power is always present at the terminals unless a fire system
reset occurs. If a fire system reset occurs, power is disconnected from the terminals for 30 seconds, then re-
applied. See Table A-3 for compatible four wire smoke detectors.
4.15.5.4 Sounder Sync Power
Sounder Sync Power continuously outputs the System Sensor synchronization pattern and is intended for use
with B200S sounder bases.
4.16 On-Board Relays (Conventional)
The control panel has two built-in programmable relays and a built-in trouble relay. All relays are Form C rated
at 2.5 A @ 24VDC.
4.16.1
Trouble Relay
The control panel has a dedicated Form C trouble relay built in. The relay provides a normally open and a
normally closed contact. The trouble relay will deactivate under any trouble condition.
Note: The NC contact is the relay contact that is closed when the panel has power and there are no trouble con-
ditions.
4.16.2
Programmable Relays
The control panel has two Form C programmable relays built in. Each relay provides a normally open and a
normally closed contact.
To install one or two programmable relays, follow these steps.
Figure 4-56 Location of Conventional Relay Circuits
4-40
Control Panel Installation
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Troubleshooting
