56 Chapter 8 Option
Liebert APM 90 Integrated Modular UPS User Manual
8.2
Option
8.2.1
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.
The battery temperature sensor is placed near the battery where it can detect the highest battery
temperature. The sensor is connected to the UPS internal logic circuit through the J8 port of the UPS bypass
module.
The installation procedures of the battery temperature sensor are as follows:
Warning
Install the battery temperature sensor strictly in accordance with the following steps, or else, the UPS and battery may
be damaged.
1. Turn off the load.
2. Power down the UPS completely. For detailed procedures, refer to
5.7.1 Completely Powering Down The
UPS
.
All UPS indication goes off, wait five minutes for the internal DC bus capacitors of the UPS to discharge
completely.
3. Place the battery temperature sensor near the battery where it can detect the highest battery temperature.
4. Connect the cable of the battery temperature sensor to the J8 port of the UPS bypass module, as shown in
Figure 8-1.
To battery temperature
measurement point
To J8 port of UPS
bypass module
1
2
3
4
TMP-2
4
3
2
1
Figure 8-1
Connection between battery temperature sensor and UPS
8.2.2
LBS Cable
The UPS provides LBS cable in length 5m, 10m, 15m to keep the outputs of two independent UPSs (or
parallel systems) in a dual bus system in synchronization.
For the connection of the LBS cable, refer to
7.1.4 LBS Cable
.
8.2.3
SIC Card
If you need to monitor the UPS through network, you may select the SIC card, which supports SNMP protocol.
The SIC card is a network management card. It can make the UPS made by Emerson real network equipment.
It can also be connected to the IRM series sensor to provide environment monitoring function. When the
intelligent equipment generates an alarm, the SIC card can notify the user by recording the log, sending trap
information and sending a mail.
For the installation and setting of the SIC card, refer to
Site Interface Web/SNMP Agent Card User Manual
.
8.2.4
Relay Card
The UPS provides relay card for the user to use dry contact signals to monitor the UPS. It is hot pluggable for
easy installation.