Installation Manual

411UDAC Document #51073 Rev. D 12/09/2008 P/N 51073:D 21
Operating Power
2.3 Operating Power
CAUTION: Several different sources of power can be connected to the 411UDAC. Disconnect all sources of power
before servicing this unit. The communicator and associated equipment may be damaged by removing and/or insert-
ing modules or cables with power applied.
Primary Power Source (AC) and Earth Ground Connections
AC power connections are made inside the 411UDAC cabinet. The primary power source is 120 VAC, 60 Hz, 0.3
amps. Run a pair of wires (with ground conductor) from the protected premises main breaker box to TB3 of the main
circuit board. As per the National Electric Code, use 14 AWG (2.00 mm
2
) or heavier gauge wire with 600V insula-
tion. 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 the earth ground stud in the cabinet. Do not use conduit for the earth ground connection since
the does not provide reliable protection.
!
FIGURE 2-4:Operating Power Connections
Connect Earth Ground
Wire to earth ground stud
Earth
Red
Black
12 VDC Battery
Neutral
Hot
411AINBX.CDR