Tait TB7100, Installation And Operation Manual

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20 Mechanical Description TB7100 Installation and Operation Manual
© Tait Electronics Limited December 2005
2.6 AC Power Supply Unit
The base station may be fitted with an internal AC power supply unit
f
, an
AC filter module
d
, and an additional fan
g
.
The AC filter module has a standard AC connector that fits into a provision
on the rear of the tray. The AC filter module slides into securing tabs on the
tray floor and is held in place by the AC power supply unit.
Note
Mechanical configurations without the provision for a standard
AC connector cannot be upgraded with the internal AC power
supply unit.
The AC power supply unit is held in place by two screws
e
. The fan is
attached to the AC power supply unit by two screws
h
.
The AC power supply unit is connected to the AC filter module via a cable
connector (not shown).
The DC output of the AC power supply unit is connected to the SI board
b
. The AC power supply unit also has a cable to provide a mains failure
signal to the SI board
c
. In case of a mains failure, this signal will cause the
power circuitry on the SI board to switch to DC external input.
Figure 2.6 AC power supply unit, filter module and fan
h
e d f e
b c
g