2: Special Application Dc Power Output Connections; 3: Relays - Fire-Lite MS-2 Instruction Manual

Output Circuits
2.4.2 Special Application DC Power Output Connections
Resettable 24 VDC special application power is available on both the MS-2 and MS-4 control
panels. Nonresettable 24 VDC special application power is available only on the MS-4.
Nonresettable Power (500 mA) -MS-4Only
24 VDC filtered, nonresettable special application power
can be obtained from
these terminals (power-limited)
2.4.3 Relays
The MS-2 and MS-4 control panels provide an alarm and fail-safe trouble relay and the MS-4 also
provides a supervisory relay. Each Form-C relay is rated for 2 amps @ 30VDC (resistive).
Note that relay connections may be power-limited or nonpower-limited, provided that 0.25"
minimum spacing is maintained between conductors of power-limited and nonpower-limited
circuits.
Note: Relay contacts are shown with
power applied to the panel and no active
troubles, alarms or supervisories.
The Trouble Relay is a fail-safe relay
which will transfer on any trouble or total
power failure.
MS-2 & MS-4 Series Manual — P/N 51512:G2 10/18/2011
+ - +
Figure 2.7 Special Application Power
TROUBLE
C TRBL NORM
Figure 2.8 Relay Terminals
4-Wire Smoke Detector Power (500 mA)
24 VDC filtered, resettable special application power for
4-wire smoke detectors can be obtained from these
terminals (power-limited)
-
ALARM SUPV
C NC NO C NC NO
Installation
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