
Pre-Installation
3-11
Chapter 3: KSU Installation
MBX IP Hardware & Installation Guide
External Backup Battery Installation
In case of power failure, the external backup batteries automatically maintain uninterrupted
power for the MBX IP System. The external batteries must provide 24V DC; this is generally
accomplished by connecting two 12V batteries in a series arrangement as shown:
1.
Connect the backup battery cable with 2 identical batteries (12V DC X 2).
2.
Connect the external back up battery cable to the battery connector of the PSU.
3.
After connecting the external backup battery cable, turn on the battery switch.
NOTE
:
The cable used to connect the battery is supplied with the KSU from the manufacturer.
Battery operation is controlled by the PSU. The PSU will provide charging current to the
batteries during normal AC power operation at a maximum of about 1A (PSU). PSU battery
operation will be halted if the AC power is reconnected or if the battery voltage is too low to
maintain full-system operation.
The external batteries can maintain System operation as needed depending on several
elements such as battery charge status, condition and capacity of the batteries, and System
configuration (number of Station ports).
The length of time that the system will operate on the batteries is dependent on several
elements including, battery charging state, condition of the batteries, capacity of the batteries,
and the size of the system (number of station ports). The chart below gives the approximate
back-up time for several system sizes and different battery capacities in ampere-hours.
Release 1.0
November 2010
Содержание MXB IP
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