User Manual
Product information and planning
9500 MPR Rel. 3.1
3DB18809AAAA Issue 1 123/980
2.8.1.2 +24 Vdc/-48 Vdc Converter unit
When office power configuration consists of +24 Vdc a +24/-48 volt power converter is required to con-
dition office power to -48 Vdc for the MSS-4/8 shelf.
The power converter resides in slot 3 or 4 of the MSS-4 shelf and either slot 4, 6, or 8 in the MSS-8 shelf.
Office power (+24 Vdc) is connected to the PDU which in turn connects to the power converter.
The output of the Power Converter (-48 Vdc) is then connected to the MSS-4/8 shelf power connector(s).
The Power Converter supports both unprotected and protected power arrangements.
The same PDU power cables are used to connect between the PDU and the power converter.
Keyed power cables are used to connect between the power converter and the MSS-4/8 shelf.
Figure 40. +24 Vdc/-48 Vdc Converter unit
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