Avaya MultiVantage, Installation Manual

Page: 32 / 246

Auxiliary power supplies
555-233-116
32
Issue 4 October 2002
!
DANGER:
Do not block or cover the ventilation openings in the case.
Do not let anything rest on the unit.
Do not attempt to recharge batteries. The power unit recharges the batteries
itself. Any other recharging method may cause leaks of corrosive electrolyte
or explosion. Discard discharged batteries as soon as possible. Discharged
batteries are more likely to leak.
Do not store batteries in high temperature areas. Batteries stored in a cold
environment should be protected from condensation during storage and
warming. Batteries should be stabilized at room temperature prior to use
after cold storage. Do not install batteries if the manufacturing date on the
label indicates that the batteries are more than six months old.
1145B power supply
The 1145B power supply powers ISDN/DCP, terminal equipment, adjuncts, and
other customer-supplied external equipment. It supplies -48V, 200 W total and
supports 32 outputs. You can install one ISDN terminal or DCP adjunct per output.
A manual switch on the distribution unit lets the user redirect reserve power to
outputs 1 to 32 so that all outputs get battery reserve power.
An optional 1149 battery and 1146 distribution unit provides uninterruptible -48
VDC power.
!
DANGER:
When operating power-supply equipment, you must follow basic safety
precautions to reduce the risk of fire, electric shock and personal injury.
Read, understand, and follow all warnings and instructions. See
‘‘Required
safety precautions’’ on page 31 .
Circuit protection
A thermistor current-limits the maximum output of each output to 12 W, but the
average power per output cannot exceed 7.25 W (200/32 = 7.25). An LED
indicates the status of the thermistor. When the LED is ON, there is a short on the
power pair.