Avaya 555-233-116 manual 1145B power supply, Circuit protection

Auxiliary power supplies

! 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.

32 Issue 4 October 2002 555-233-116