MS-4424 15153:F1 06/18/97
19
Alarm Relay
One Form-C dry alarm contact is provided in the basic panel for controlling supplementary devices. It is
rated 2 amps at 30 VDC (resistive) and is non-silenceable when an alarm occurs. See below for terminal
location.
Trouble Relay
One Form-C dry trouble contact is provided in the basic panel for controlling supplementary devices. It
is rated 2 amps at 30 VDC (resistive) and will silence when trouble condition is cleared. See below for
terminal location.
Note: The alarm and trouble Form-C dry contact relays must be power limited. They must be wired from one
of the 24V power limited terminals as shown in the figure below or a comparable UL listed power limited
power supply.
3.5
Power
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.
Unregulated Power
24 VDC power for inductive-type
devices such as door holders can
be connected to TB1 terminals 1(+)
and 2 (-).
1
2
3
4
+24VU +24VR +24VNR
+ - + - + -
TB1
This output is not suitable for
powering devices requiring
filtered, regulated DC power.
The combined current draws from the Resettable and Non-Resettable
outputs cannot exceed 200 mA.
4-Wire Smoke Detector Power
24 VDC filtered, regulated, resettable
power for 4-wire smoke detectors can
be obtained from TB1 Terminals 3 (+)
and 4 (-).
Non-resettable Power
24 VDC filtered, regulated, non-reset-
table power can be drawn from TB2
Terminals 1 (+) and 2 (-).
ALARM TROUBLE
NO NC C NO NC C
Alarm Trouble
+24VU +24VR +24VNR
+ - + - + -
- - -
- - -
- - -
or or
1
2
3
4
5
6
1
2
3
4 1 2
TB1
TB2
TB3
1 2
TB2
Figure 3.4-2: Alarm/Trouble Coils and Contacts
Figure 3.5-1: Diagram of Power Terminals
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