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2. Installation Powering External Devices
22
PDRP-1001 Instruction Manual PN 50734:D0 04/06/01
Alarm Relay Circuit
One Form-C dry contact alarm relay is provided in the basic panel for controlling supplementary devices.
Contacts are rated 2 amps at 30 VDC and 0.5 amps at 30 VAC (resistive) and are non-silenceable when
an alarm occurs.
Trouble Relay Circuit
One Form-C dry contact trouble relay is provided in the basic panel for controlling supplementary devices.
It is rated 2 amps at 30 VDC and 0.5 amps at 30 VAC (resistive) and will restore to normal when the trouble
condition is cleared.
Note: Power connected to these relay contacts must come from a power-limited supply. Power may be obtained from
TB1 Terminals 24VU or 24VR and TB2 Terminals 24VNR, or a UL-listed power-limited power supply.
Figure 11 Schematic Representation of Alarm/Trouble Coils & Contacts
Powering External Devices
CAUTION: Several different sources of power can be connected to this panel. Disconnect all sources
of power before servicing. The panel and associated equipment may be damaged by removing and/or
inserting cards, modules, or interconnecting cables while this unit is energized.
DC power connections are available from TB1 and TB2 on the control panel as shown below:
Figure 12 Power Terminals
TB3
MS44-relay.cdr
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!
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TB1
TB2
RMS-Regulated Power -
24 VDC power for inductive-type
devices such as door holders can
be connected to these terminals.
This output is not suitable for
powering devices requiring
filtered DC power.
Resettable Power -
24 VDC filtered, resettable power for four-wire smoke
detectors can be obtained from these terminals.
The combined current draws from the Resettable and
Nonresettable outputs cannot exceed 200 mA.
Nonresettable Power -
24 VDC filtered, nonresettable power
can be drawn from these terminals.
The combined current draws from the
Resettable and Nonresettable outputs
cannot exceed 200 mA.
MS44-dcpower.cdr