User's Manual

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4) Main Power Supply Unit (MPSU)
MPSU receives -48V of input and outputs +6V and +9V of DC power.
On the front panel, this unit has an output test port and it also has DC ALM LED Indicator to
show whether output gets faulty.
Figure 4.6 – MPSU Outer Look
4.1.5 Front/rear panels of BIU
1) Front panel