Tait TB9100, Installation And Operation Manual

Page: 17 / 144

TB9100 Installation and Operation Manual Description 17
© Tait Electronics Limited May 2006
Power Management
TB9100 base stations with a PMU manage the supply of power to ensure
uninterrupted operation of the base station. A range of parameters is
monitored and can trigger alarms that are sent via the reciter to the CSS and
a syslog collector.
AC to DC
Changeover
When the PMU has an AC and a DC module, the TB9100 can be powered
by either the AC (mains) or the DC (battery) supply. The base station will
default to the AC supply if both supplies are provided. If the AC supply
becomes unavailable, a seamless changeover from the AC to DC supply takes
place, providing that the battery voltage is above the configured minimum.
You can use the CSS to monitor whether the base station is running on
battery or mains power.
DC Operation When the base station is running off the DC supply and the battery voltage
falls below the configured minimum, the base station will enter PMU
Shutdown mode to protect the battery and base station equipment. A
standby power supply card is required to maintain the power to the PMU
microprocessor, while the rest of the PMU is shut down.
Figure 1.4 12 V PA base station system communication paths