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2.6 Alber Monitoring System—Optional
The Liebert matching battery cabinet allows installing an optional Alber battery monitoring system
in the cabinet. The Alber battery monitoring continuously checks all critical battery parameters, such
as cell voltage, overall string voltage, current and temperature. Automatic periodic tests of internal
resistance of each battery will verify the battery’s operating integrity. Additional capabilities include
automatic internal DC resistance tests and trend analysis providing the ability to analyze perfor-
mance and aid in troubleshooting.
The Alber monitoring system is installed inside the battery cabinet (see Figure 33). The monitoring
system requires approximately 0.5A, single-phase power.
This power can come from the output of the UPS the battery cabinet is suppling (see Figure 33).
The Alber monitoring system consists of a Controller Module and Data Collector Module (see
Figure 31). One Controller Module can monitor up to six (6) battery cabinets with a Data Collector
Module installed. The Battery cabinet with the Controller Module (battery cabinet #1) must be install
in the position closest to the UPS.
For details about operating the Alber system, see the Alber Monitoring System manual, available at
the Liebert Web Site, www.liebert.com
2.7 External Battery Room Temperature Sensor—Optional
For systems that do not use Liebert NXL battery cabinets, but have an MBD connected to a battery
string, an optional temperature sensor can be installed to monitor the ambient room temperature.
This sensor is connected to the BIB in the MBD cabinet (see Figure 11). This sensor will allow the
Liebert NXL UPS to perform temperature compensation charging.
Figure 11 Battery temperature sensor control connection
TB1154
Battery Interface Board
(inside MBD Cabinet)
P1153