Positron Teleline 750003, Description And Installation

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Wall-Mount Power Supply Chassis model 750003
Figure 4: 24 V Power supply Source
3.5.2 48 V systems
When using 48 V Power Supplies, the Supplies, the Chassis can provide floating
48 Vdc, -48 Vdc or +48 Vdc referenced to ground. Connect the positive output of
the Chassis (0 V) to the positive input of the equipment and the negative output of
the Chassis (-48 V) to the negative input of the equipment.
Q
Unit is factory set for -48 Vdc output.
Refer to Figure 5 on page 27 for a view of the 48 V wiring.