Operating Power
22
Document #15140 Rev.G 01/02/02 P/N 15140:G
2.3
Operating 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.
Primary Power Source (AC) and Earth Ground Connections
AC power connections are made inside the control panel cabinet. The primary power source for the MS-5024UD is
120 VAC, 60 Hz, 2.3 amps and for the MS-5024UDE is 220/240 VAC, 50 HZ, 1.2 amps. Run a pair of wires (with
ground conductor) from the protected premises main breaker box to TB1 of the main circuit board. As per the
National Electric Code, use 14 AWG (2.00 mm
2
) or heavier gauge wire with 600V insulation. No other equipment
may be connected to this circuit. In addition, this circuit must be provided with overcurrent protection and may not
contain any power disconnect devices. A separate Earth Ground connection must be made to ensure proper panel
operation and lightning and transient protection. Connect the Earth Ground wire [minimum 14 AWG (2.00 mm
2
)] to
one of the transformer mounting studs.
Note: Do not use conduit for the Earth Ground connection since this does not
provide reliable protection.
Secondary Power Source (Batteries)
Observe polarity when connecting the battery. Connect the battery cable to J1 on the main circuit board using the
plug-in connector provided. The battery charger is current-limited and capable of recharging sealed lead acid type
batteries. The charger shuts off when the system is in alarm or if the battery voltage drops too low (below 17.4
VDC). See Appendix A for calculation of the correct battery rating.
CAUTION: Battery contains sulfuric acid which can cause severe burns to the skin and eyes, and can destroy fab-
rics. If contact is made with sulfuric acid, immediately flush the skin or eyes with water for 15 minutes and seek
immediate medical attention.
!
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FIGURE 2-4:
Operating Power Connections
Connect Earth Ground Wire