Pmu Operation On Dc Input - Tait TB8100 Service Manual

Task 3 —
Check Plug-in Cards
with Another DC
Converter
13.8.3

PMU Operation on DC Input

Introduction
Alarms
Startup and
Shutdown Limits
TB8100 Service Manual
© Tait Electronics Limited September 2006
If the DC converter still fails to produce an output after testing the cards as
described above, the DC converter board may be faulty.
1. Remove the plug-in cards from the DC converter under test and fit
them to another DC converter which is known to work.
2. If this second DC converter works correctly, the DC converter under
test is faulty.
3. Fit a new DC module to the PMU under test, reassemble the PMU,
and go to "Final Tasks" on page
This section is a copy of the section that is published in the TB8100
Installation and Operation Manual. It is reproduced in this manual for your
convenience.
The operation of the PMU on DC input is controlled by three sets of
parameters:
user-programmable alarms
user-programmable startup and shutdown limits
battery protection limits.
The voltage range for each of these parameters is provided in
page 239. Figure 13.9 on page 238
and how they control the operation of the PMU over a range of DC input
voltages.
User-programmable alarms can be set for low or high battery voltage. The
alarms will be triggered when the set voltage levels are reached.
To set the alarms, run the Service Kit and select Configure > Alarms >
Thresholds. In the Thresholds form, enter the required minimum and
maximum values in the PMU battery voltage fields.
The user-programmable startup and shutdown limits allow for adjustable
startup and shutdown voltages. These limits can be adjusted for different
numbers of battery cells, or for the particular requirements of the base
station operation. Once the limits are reached, the PMU will shutdown.
To set the startup and shutdown limits, run the Service Kit and select
Configure > Base Station > Miscellaneous. In the Power Configuration
area, enter the required values in the Power shutdown voltage and
Power startup voltage fields.
247.
illustrates how these parameters interact,
Power Management Unit Fault Finding
Table 13.4 on
237