Tait TB9100 - Page 127

TB9100/P25 CG/P25 TAG Installation and Operation Manual Technical Description 127
© Tait Limited March 2014
Standby Power
Supply
The standby power supply card plugs into the DC converter board and
provides power to the reciter output. This allows the main DC unit to be
switched off to reduce current consumption in low-power situations,
e.g. when the PA is not transmitting.
Also, when battery capacity is low, it will maintain the power supply to the
microprocessor and shut down the rest of the PMU. Refer to “Power
Management” on page 27 for further details.
Figure 8.5 PMU high-level diagram
PFC
Circuitry
PFC
Control
Card
DC Input
Filter
Card
DC
Control
Card
Auxiliary
Power Supply
Board
Battery
Control
Card
Standby
Power Supply
Card
HVDC Control &
Microprocessor
Card
HVDC Circuitry
DC Converter Board
28V
28V
28V O/P (PA)
System
Control Bus
28V O/P (Reciter)
AC I/P
115/230V
50/60Hz
400VDC
DC I/P
12/24/48V
28V
DC O/P
13.65/27.3/54.6V
AC Converter Board
AC Module
DC Module