Tait TB9100 User Manual

130 Technical Description TB9100/P25 CG/P25 TAG Installation and Operation Manual
© Tait Limited March 2014
Startup and
Shutdown Limits
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 shut down.
These limits are subject to the tolerances of the battery protection circuitry,
as stated in “Battery Protection (Fail-safe) Limits” in Table 8.2 on page 130.
Notice The default startup voltage values in the CSS will not allow the
PMU to start up when the battery is below its nominal voltage. How-
ever, PMUs with hardware version 00.03 and later, firmware version
02.09 and later, in conjunction with CSS version 3.20 and later, allow
the user to set the startup voltage below the nominal voltage of the bat-
tery. Continuing to use a battery for extended periods when it is below
its nominal voltage will severely shorten its service life. For more infor-
mation on battery management, we recommend that you consult the
battery manufacturer.
Battery Protection
Limits
The battery protection limits are set in hardware at the factory, and cannot
be adjusted by the user. These limits will not be reached under normal
operation conditions, but are provided as “fail-safe” measures to protect the
battery from deep discharge. They also remove the need for low-voltage
disconnect modules.
Table 8.2 PMU DC voltage limits
a
Parameter
Voltage Range
12V PMU 24V PMU 48V PMU
User-programmable Alarms
b
Low Battery Voltage
High Battery Voltage
10V to 14V
14V to 17.5V
20V to 28V
28V to 35V
40V to 56V
56V to 70V
User-programmable Limits
b
Startup Voltage (after shutdown)
Shutdown Voltage
10.9V to 15V +0.3V
10V to 13.5V +0.3V
21.8V to 30V +0.5V
20V to 27V +0.5V
43.6V to 60V +1V
40V to 54V +1V
Battery Protection (Fail-safe) Limits
Startup Voltage
Undervoltage Shutdown
Overvoltage Shutdown
Overvoltage Shutdown Reset
10.8V +
0.2V
9.5V +
0.3V
18.1V +
0.3V
17.1V +0.3V
21.6V +
0.5V
19V +
0.5V
36.2V +
0.5V
34.2V +0.5V
43.2V +
1V
38V +
1V
72.4V +
1V
68.4V +1V
a. The information in this table is extracted from the Specifications Manual. Refer to the latest issue of this manual
for the most up-to-date and complete PMU specifications.
b. Using the CSS.

Tait TB9100 Specifications

General

Brand	Tait
Model	TB9100
Category	Accessories
Language	English