Battery Backup Unit
TA 900 Series (3rd Gen) HIG
30
Copyright © 2020 ADTRAN, Inc.
61213908F1-34A
Wall Mounting the Total Access 916/924 BBU (1175044L2)
For a wallmount installation, the BBU installs on plywood (3/4-inch minimum) using three
#10 x 3/4-inch pan-head wood screws (provided with the BBU). Install the BBU as follows:.
Maintenance
• The BBU does not require routine maintenance for normal operation. The life expectancy
of the BBU is 3 to 5 years on standby use when used at room temperature.
• Excessive heat decreases battery power and life. Extreme low temperature also
decreases battery capacity. Ideal ambient temperature for battery life and capacity is 68°F
(20°C).
• Battery shelf life is extended in cooler temperatures.
• To order replacement batteries, reference the following part number: 1975044L1 (12 V
replacement batteries).
The 1175044L2 BBU must be mounted with the following minimum clearances:
•Top: 9-inch clearance
•Bottom: 5-inch clearance
•Left Side: 5-inch clearance
•Right side: 2-inch clearance
Instructions for Wall Mounting the 1175044L2 BBU
Step
Action
1
Determine the preferred unit layout to ensure cable plugs reach their designated sockets.
2
Ensuring a plumb measurement, use the template provided with the 1175044L2 BBU to mark
and drill three pilot holes for the #10 mounting screws.
3
Insert the supplied wood screws (#10 x 3/4”) into the three pilot holes, leaving 1/16” space
between the screw-head and the backboard.
Fully loaded BBU weighs 30 pounds.
4
Mount the BBU on the three support screws on the battery box and open the cover.
5
Use a long-shaft screwdriver to tighten the three support screws and secure the BBU to the
wall.
6
Use cable ties as appropriate. The battery connection from the BBU should be directly
connected to the
BBU
port on the rear of the Total Access 916/624chassis.
