Positron 7885-2, Описание и установка

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Standalone Power Supply Unit 120 V dc to -24 V dc 13
7885-2 & 7885-3
4.2 Electrical Installation
Caution
The station and Central Office (CO) cables should be kept at least six inches
apart upon wiring in order to prevent an electric arc between the two in the
event of damage to, or degradation of, their insulation.
1. Connect the Standalone Power Supply Unit, model 7885-2 to the Battery
unit, model 7885-3, with the cable provided. The cable mates to connectors
on the rear of each unit.
2. Using a digital voltmeter, test the output of the Power Supply Unit to verify
the presence of 48 V dc, making sure that the polarity is correct. If you read
0, 12 or 36 volts, there may be a polarity reversal of one or more batteries. If
there is a polarity reversal, do not plug in the Power Supply Unit until the
polarity reversal has been corrected. For further assistance contact the
Positron Technical Customer Support department.
3. Connect the power supply output to the shelf. For a Five or Eight-card
Shelf, this may be accomplished via the Station side cable or by using a
separate power cable. For a Three-card Shelf, the only entry is through the
Station side cable. The table below lists the Power Supply Unit output
connections.
Table 6 Power Supply Unit Output Connections
Power Supply Output Shelf Terminal Designation
Configured for floating output:
0 V dc (black) RU GEN
48 V dc (white) -48 V dc
Configured for output referenced to station ground:
0 V dc (black) GND
-48 V dc (white) -48 V dc