Battery Temperature Sensor Cable; On/Off Switch For Power Supply And Battery Charger; Table 2-2 On/Off Switch - States For Power Supply And Battery Charger - Motorola GTR 8000 Manual

GTR 8000 Base Radio
The maximum charging current available from the integrated charger is 3A (48VDC nominal system). In order to
ensure that the charger is capable of maintaining an adequate state-of-charge on the backup battery, and the backup
battery is restored to full capacity within a reasonable amount of time following operation on battery backup power.
Motorola recommends that a battery with capacity no larger than 60A-hr be connected to a single charger .
In addition to standard sealed lead-acid batteries (valve-regulated lead acid or gel cells), the power supply supports
charging of vented lead-acid and NiCd batteries.

2.1.4.3 Battery Temperature Sensor Cable

The integrated charger in the power supply performs temperature compensated battery charging when a temperature
sensor is connected. If the sensor is disconnected, the charger continues to operate as an uncompensated charger
with the charging profile following the minimum charger voltage specified by the battery manufacturer.
Included is a 40 foot battery temperature sensor cable, which attaches to a battery pack, supplied by your
organization, and to the backplane of the device. This three-wire cable carries a voltage signal to the power supply
from the sensor element, which needs to be mounted in close proximity to the storage battery. Voltage is proportional
to the battery temperature and is used by diagnostic circuitry in the power supply module. This cable is extended to
a total length of 190 feet using 50 foot extensions. See
Continuous operation with a disconnected sensor is not recommended.

2.1.4.4 ON/OFF Switch for Power Supply and Battery Charger

This table identifies the switch states for the power supply and battery charger.

Table 2-2 ON/OFF Switch - States for Power Supply and Battery Charger

Switch Position
2-10
ON (1)
OFF (0)
3.4.3.4 Mounting the Battery Temperature Sensor, page
Power Supply State
• Power Factor Correction
(PFC) section is active (AC
input only)
• Main DC converter runs to
create the MAIN and AUX
DC outputs
• Main DC converter is turned
OFF and the MAIN and AUX
DC outputs become 0.0VDC
Battery Charger State
Can be started if desired (AC
input only)
Disabled (AC input only)
6871022P86-A - November 2012
3-21.