Table of Contents
Advertisement
Aria-34e
Installation
Digital Key Telephone System
4.6 SYSTEM WIRING
4.6.1 BATTERY BACK-UP WIRING INSTALLATION
The system can be equipped with external batteries for proper operation when local
AC power fails. The Back-Up batteries are connected to the connector on the front of
the PSU, as shown in Figure 25.
Figure 25. BATTERY BACK-UP WIRING
The External batteries provides 24 Volts DC. This is accomplished by connecting two
12 volts batteries in series. Battery operation is controlled by the PSU. The PSU will
provide a charging current (maximum 0.5 amp) to the batteries during normal AC
power operation. The PSU will automatically stop the battery operation when AC
power re-applied or low battery voltage detected.
Carefully check the battery polarity with cable colors (RED and BLUE) when
connecting the battery to system. It is recommended to use a fuse (20A @250V)
between battery and system.
The system operating time on battery back-up will depend on several elements. These
are: battery charge state, condition of the batteries, capacity of the batteries, system
configuration (number of station ports) and system traffic activity.
4-28
Rev 1.3
Aria Communications Pty Ltd.
A.C.N. 090 723 925
Advertisement
Table of Contents
