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1145B2/1146B2 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.
NOTE: The switch must be set to the 1-32 position.
The 1145B22/1146B2 is a -48 V 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 1146B2 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 1145B22 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 1145B22 is required for installations outside the United States.
Auxiliary power (local or bulk) is always required for the following:
1145B2/1146B2 Mounting Arrangement���
Expanded Power Distribution Unit��
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