68 Installation TB9100/P25 CG/P25 TAG Installation and Operation Manual
© Tait Limited March 2014
Connecting the Auxiliary DC Power Output
The PMU can provide an auxiliary DC output from the auxiliary power
supply board. This board is available with an output of 13.65VDC,
27.3VDC, or 54.6VDC (depending on the model), and is current limited
to 3A, 1.5A or 750mA respectively. This power supply is available on the
auxiliary output connector on the rear panel.
The auxiliary power supply is configured by the CSS. Refer to the CSS
Help or manual for more details.
You can connect multiple auxiliary power supply boards in parallel for
redundancy purposes, or to provide an output greater than 40W. Although
no active current sharing is used, auxiliary boards connected in parallel will
current-share before reaching their power limit. The failure (or switching
off) of one auxiliary board will not load any other paralleled auxiliary boards
in the circuit.
Auxiliary DC Power
Output Cabling
Network elements are supplied with a connector, as shown in Figure 3.12.
You can use this to connect the PMU’s auxiliary DC power output to
another device.
Contact your nearest regional Tait office for details on the full range of
wiring kits available.
Figure 3.11 DC power supply connection
Refer to Figure 3.10 for recommended DC power connection
subrack DC input terminal block
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