Honeywell MS-2 manual Special Application DC Power Output Connections, Relays, + +

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.

Nonresettable Power (500 mA) - MS-4 Only	4-Wire Smoke Detector Power (500 mA)
24 VDC filtered, nonresettable special	24 VDC filtered, resettable special application power
application power can be obtained from	for 4-wire smoke detectors can be obtained from
these terminals (power-limited)	these terminals (power-limited)

TB1

+- + -

Figure 2.7 Special Application Power

ms-4tb1.cdr

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 @ 30VAC (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.

TROUBLE		ALARM		SUPV
C TRBL NORM	C	NC NO	C	NC	NO
TB5			TB6		TB7	ms4relay.cdr

Figure 2.8 Relay Terminals

MS-2/MS-4 PN 51512:E 01/18/05 23