54
Installation
TB9100/P25 CG Installation and Operation Manual
© Tait Electronics Limited January 2007
Your TB9100 base station should come
supplied with a power supply cord to
connect the male IEC connector on the
PMU to the local AC supply. The pins of
the IEC connector on the PMU are
identified at right.
Connecting DC Power
The way you connect DC power varies, depending on the type of base
station.
Base Station with
PMU
The TB9100 PMU is designed to accept a nominal 12VDC, 24VDC or
48VDC input (depending on the model) with negative or positive ground.
There is a minimum DC startup threshold to prevent damaging a battery
which has little capacity left.
You must connect the DC supply from the battery to the PMU via a fuse or
Darted circuit breaker with the appropriate rating, as shown in the table
below. The DC input leads should be of a suitable gauge to ensure less than
0.2V drop at maximum load over the required length of lead.
Terminate and insulate the DC input leads to protect them from accidentally
shorting to the subrack if the PMU is removed before the leads are
disconnected.
We recommend a screw torque of 18–20lbf·in(2–2.25N·m).
ground
rear view
neutral
phase
Nominal Supply
Voltage
Input Voltage
Range
Circuit Breaker/
Fuse Rating
Recommended
Wire Gauge
a
a. For a length of 5ft to 6.5ft (1.5m to 2m) (typical).
12VDC
10VDC to 16.8VDC
60A
2AWG / 35mm
2
24VDC
20VDC to 33.6VDC
30A
5AWG / 16mm
2
48VDC
40VDC to 60VDC
15A
8AWG / 8mm
2
Figure 3.10
Recommended DC power connection
