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Audio Command Center Series Manual — P/N 51889:E1 6/8/2010 57
Installation of Option Modules Installation
3.8 Installation of Option Modules
3.8.1 Audio Amplifier Module (ACC-AAM25)
The optional audio amplifier module is identical to the module provided with the factory standard
panel configuration. It can be used to provide a second 25 watt speaker circuit, increasing the total
ACC-25/50 power to 50 watts, or it can be used as a backup amplifier. LEDs on the amplifier mod-
ule are for Amp Supervision (green - indicates amp functional) and Circuit Trouble (yellow - indi-
cates wiring fault or amplifier fail). Connector J1 of the audio amplifier module plugs into
connector P3 located at the bottom center of the main circuit board.
1. For ease of access, all wiring should be connected to the terminals on the main circuit board
terminal blocks TB1, TB9 and TB10 prior to installing the secondary Audio Amplifier
Module.
2. Remove mounting screw shown, from the main circuit board, and save (refer to illustration
below).
3. Install one supplied metal standoff in location from which mounting screw was removed in
Step 2.
4. Install the Audio Amplifier Module by carefully aligning the amplifier's J1 connector with the
P3 connector on the main circuit board. Press the Module securely into place making certain
not to bend or break any connector pins.
5. Secure the Audio Amplifier Module with the supplied screws plus the screw removed in Step
2. It is important to secure the module with the metal screws in order to help protect against
electrical transients.
6. Configure the Audio Amplifier for primary or backup amplifier operation by setting switch S1
on the amplifier:
(1) Position switch S1 in the DOWN position for primary operation which adds the new
amplifier's 25 watts to total system power (50 watts total).
(2) Position switch S1 in the UP 'Backup On' position to configure the amplifier as a
backup in the event the primary amplifier fails. Also for ACC-25/50ZS & ACC-
25/50ZST: position switch SW1 on the ACC-ZSM board to the AAM1 position for single
amplifier circuit operation.
7. Check to make certain the factory installed jumpers are in place on P1 of the Audio Amplifier
Module(s). Do not remove unless installing the FC-XRM70 Transformer Module. See
Figure 3.18 on page 59 for more information.
!
CAUTION: DISCONNECT POWER
BEFORE INSTALLING ANY MODULES OR CABLES, MAKE CERTAIN ALL POWER (AC AND DC)
HAS BEEN REMOVED AND BE SURE TO OBSERVE PROPER GROUNDING AND HANDLING
PROCEDURES.