Manual

MS-2 & MS-4 Series Manual — P/N 51512:G2 10/18/2011 23
Output Circuits Installation
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.
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).
Not
e th
at 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.
TB1
Figure 2.7 Special Application Power
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)
Nonresettable Power (500 mA) -MS-4Only
24 VDC filtered, nonresettable special application power
can be obtained from
these terminals (power-limited)
+ - + -
ms-4tb1.wmf
TB5
TB6
TB7
TROUBLE
C TRBL NORM
C NC NO
ALARM
SUPV
C NC NO
Figure 2.8 Relay Terminals
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.
ms4relay.wmf