TB9100/P25 CG/P25 TAG Installation and Operation Manual Installation 67
© Tait Limited March 2014
We recommend a screw torque of 18–20lbf·in (2–2.25N·m).
12V DC PA-only
Base Station
12V DC PA-only base stations have a 12V PA. This is designed to accept a
nominal 12V DC input with negative 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 PA 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.
We recommend a screw torque of 4.5lbf·in (0.5N·m).
Base Station with
no PMU or 12V PA
Base stations with no 12V PA or PMU are designed to accept a DC input
of 10.8VDC to 32VDC with negative ground. The DC input terminal
block is mounted on the rear of the subrack.
Figure 3.10 Recommended DC power connection
Battery
PMU
Circuit Breaker
or Fuse
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 15A to 18A 8AWG / 8mm
2
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