
TB9300 Specifications Manual
Base Station Specifications
13
© Tait International Limited August 2022
DC Input
Input voltage
User-programmable alarms
a
Low battery voltage
High battery voltage
User-programmable limits
b
Startup voltage
(after shutdown)
Shutdown voltage
Battery protection (fail-safe) limits
c
Startup voltage
Undervoltage shutdown
Overvoltage shutdown
Overvoltage shutdown reset
12 V PMU
10 V to 14 V
14 V to 17.5 V
10.9 V to 15 ±0.3V
10 V to 13.5 V ±0.3V
10.8 V ±0.2 V
9.5 V ±0.3 V
18.1 V ±0.3 V
17.1 V ±0.3 V
24 V PMU
20 V to 28 V
28 V to 35 V
21.8 V to 30 V ±0.5V
20 V to 27 V ±0.5V
21.6 V ±0.5 V
19 V ±0.5 V
36.2 V ±0.5 V
34.2 V ±0.5 V
48 V PMU
40 V to 56V
56V to 70V
43.6 V to 60V ±1V
40V to 54V ±1V
43.2 V ±1 V
38 V ±1 V
72.4 V ±1 V
68.4 V ±1 V
a. User-programmable alarms can be set for low or high battery voltage, using the web interface. The alarms will be triggered
when the set voltage levels are reached. These limits are subject to the tolerances of the battery protection circuitry, as
stated in “Battery Protection (Fail-safe) Limits” above.
b. The user-programmable startup and shutdown limits allow for adjustable startup and shutdown voltages. Using the web
interface, these limits can be adjusted for different numbers of battery cells, or for the particular requirements of base station
operation. Once the limits are reached, the PMU will shutdown. These limits are subject to the tolerances of the battery
protection circuitry.
c. 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.
Input current
0V to battery protection startup
voltage
d
Battery protection startup voltage to
user-programmed startup voltage
e
12
V
2 mA maximum
40 mA typical
at 10.8 V
24 V
2 mA maximum
30.1 mA typical
at 21.6 V
48
V
1.2 mA maximum
13.2 mA typical
at 43.2 V
Operating current
refer to
“Power and Current Consumption” on page 15
d. When the input voltage drops below the battery protection undervoltage shutdown limit, and until the voltage rises above the
battery protection startup voltage.
e. At initial power-up; or, after battery protection has occurred, when the input voltage rises above the battery protection startup
voltage (with the PMU now under control of its microcontroller), but is still below the user-programmed startup voltage
Protection
Fault current (input)
Wrong input voltage
Wrong input voltage polarity
circuit breaker or fuse in external wiring
electronic lock-out
shunt diode
f. Provided by user.