User's Manual

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Note that BIU does not operate if the "+" terminal and the "–" terminal of the -48V power
are not inserted into the accurate polarity.
When you connect -48V power with BIU, use the ON/OFF switch of MPSU located at the front
of BIU to check the power.
Power Switch LED Description
Abnormal, Not supply Power -48Vdc
ON
Normal supply power -48Vdc
Normal Status
O
DC ALM
Failure of output Power
ON
I
DC ALM
Normal Status