9.2.3 Battery Temperature Sensor
The battery temperature sensor is used to detect the battery temperature. With this function, we can adjust the float charging
voltage of the battery to make it inversely proportional to the ambient temperature of the battery, so as to prevent the over-
charge of the battery at high ambient temperature.
Installation preparation
1. Tools: one cross head screwdriver.
2. Check whether the installation materials are all set, including: one battery temperature sensor.
Installation steps
W A RN IN G!
1. Install the battery tem perature sensor strictly in accord ance with the follow ing steps, or
else, the U PS and battery m ay be damaged.
2. W hen installing the battery tem p erature sensor, turn off the U PS. During installation, be
sure not to touch the battery term inals, exposed copper bars and com ponents.
1. Power down the UPS completely.
a. Turn off the load.
b. All UPS indication goes off, wait five minutes for the internal DC bus capacitors of the UPS to discharge
completely.
2. Connect one end of the network cable with shielded RJ45 port to the battery temperature sensor and plug the
other end into the J2 dry contact port on the UPS bypass. The temperature sensor can be connected in series
with a maximum of 20 sensors and a maximum distance of 50m.
3. Route and pack the cables in order. Note that the cables should be routed separately from the power cables, to
avoid EMI.
9.2.4 Battery Ground Fault Kit
The UPS provides a battery ground fault detector to detect and remove battery ground fault so as to ensure reliable system
operation.
When a battery ground fault is detected, an alarm will appear on the UPS display panel.
The battery ground fault detector includes a mutual inductor and a PCB, which should be installed in the BCB box. For the
installation and connection of the battery ground fault detector, refer to Battery Ground Fault Detector (Optional) .
9 Options
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Vertiv™ Liebert® EXM2 UPS User Manual
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