Honeywell Mini-AT, User Manual, Page: 29 / 156

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Page 29
Mini-AT User Guide
Backup Battery
The Mini-AT’s backup battery is a triple AA-alkaline battery pack (40-2444) that plugs into the main board at
connector J26 (see Figure 1 on page 8). In the event of a main power supply failure, the backup battery will
maintain audit trail information.
The Mini-AT was setup according to your company’s specifications and was shipped from the factory without
any batteries connected. The configuration information was programmed into E
2
PROM, which can maintain
its memory without any power applied to the instrument. However, power must be applied to the instrument
before being placed into service.
To power the Mini-AT:
1) Plug the main battery cable into either J7 or J8, the white connectors on the lower left side of the main
board.
See figures 10 and 11 on page 33 for power connections when an internal modem is
installed.
2) Plug the backup battery in to jumper J26, located to the left of the backup battery pack. The backup
battery pack is located near the center of the main board. The connector is keyed to ensure that it can
only be installed correctly.
It is important to plug in the main battery (or alternative power source) before plugging in the
backup battery. If the batteries are plugged in incorrectly, the LCD will display
‘. .H.E.L.P. .’ (see page 36 for more info on HELP mode). If this occurs, unplug both batteries,
and wait until the LCD goes blank. At this point plug in the main battery, then the backup
battery.
The Mini-AT is now fully powered. A low voltage battery alarm will occur when either the main battery or the
backup battery runs low on power.