66 Installation TB9100/P25 CG/P25 TAG Installation and Operation Manual
© Tait Limited March 2014
Your 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 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
DC-rated circuit breaker with a contact separation of 3mm, and 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. Protective covers for the DC terminals are supplied with each
PMU.
ground
rear view
neutral
phase
Nominal Supply
Voltage
Input Voltage
Range
Circuit Breaker/
Fuse Rating
a
a. The actual current consumption of the base station will be lower than these require-
ments (refer to the Specifications Manual for more information).
Recommended
Wire Gauge
b
b. 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
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