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46 Audio Command Center Series Manual — P/N 51889:E1 6/8/2010
Installation Operating Power
3.3 Operating Power
AC Power and Earth Ground Connection
Primary power source for the ACC-25/50, ACC-25/50ZS, and ACC-25/50ZST is 120 VAC, 60 Hz,
1.5 amps. Overcurrent protection for this circuit must comply with Article 760 of the National
Electrical Code (NEC) and/or local codes. Make certain that the AC mains circuit breaker is off
before making any wiring connections between the mains and the panel. Run a pair of wires (with
ground conductor) from the protected premises main breaker box to TB3 of the main circuit board.
!
WARNING: RISK OF EQUIPMENT DAMAGE AND PERSONAL INJURY
SEVERAL DIFFERENT SOURCES OF POWER CAN BE CONNECTED TO THIS PANEL. DIS-
CONNECT 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. BE SURE TO OBSERVE
PROPER GROUNDING AND HANDLING PROCEDURES.
Backbox
Transformer Mounting Studs
acc25bkb.wmf
Transformer Mounting Slots
Main Circuit Board
Mounting Studs
P1 Connector -
Transformer
a
c
2
5
x
m
n
t
.
w
m
f
AC Terminal TB3
P10 Connector - Battery
Transformer Assembly
Figure 3.4 Installation of Power Supply Transformer