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DEFINITY Made Easy Tools
Issue 3, December 2001
Install and Wire Telephone Power Supply
The 1145B closet power arrangement provides an uninterruptible -48 VDC power source with battery and 1146B distribution unit for ISDN/DCP, terminal equipment, adjuncts, and other customer-supplied equipment. During AC power interruptions, batteries automatically provide power to the load.
| Note: | Before you begin, read this Important Warning for 1145B Power Supply. |
1145B/1146B Mounting Arrangement shows how the standard power supply and wall-mounting plates fit together. Expanded Power Distribution Unit shows the expanded power supply components (power distribution unit and "T" cable).
A manual switch on the distribution unit allows the user to redirect reserve power to outputs 1 through 32 so all outputs are provided battery reserve power, or to outputs 1 through 8 to provide high power above 6.25 watts.
The 1145B/1146B is a -48V power supply with 275 watts total output. Each output circuit is current limited by a Polymer Positive Temperature Coefficient Resistance Device (PTC) that limits the maximum output to 12 watts. Each 1146B output has an LED to indicate the status of the PTC. If the LED is on, the PTC has a short on that power pair.
Not all outputs can simultaneously provide 12 watts. The average power per output cannot exceed 8.6 watts (275/32 = 8.6). The 1145B is designed to power one ISDN terminal or DCP adjunct per output. The maximum number of terminals or adjuncts is 32 at less than or equal to 6.25 watts each. The 1145B is required for installations outside the United States.
Auxiliary power (local or bulk) is always required for the following:
1145B/1146B Mounting Arrangement
Expanded Power Distribution Unit
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| Copyright� 2001 Avaya Inc. |
| Send comments to MadeEasy Development Team |
| Always check at the Made Easy Web site for the most current information. |
