User's Manual

Confidential&Proprietary61/115 SC‐DAS
MCPUtoqueryandcontrolstateofeachmoduleandaPowerCabletosupplypowerfromexternal
rectifiers.
Inaddition,therareslotsfortheMDBUswhichprovideservicesfordesiredband(Optional)andthe
MCDUtocombineanddivideTX/RXsignalsforeachSISOandMIMOslots
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5.1.2 BIUPowerCabling
BIUrequires‐48VDCinputpower.ConnectDCcablefromthepowersupplytotheTerminalBlock
seenattherearofBIU.
Terminal Colorofcable Description Remark
‐48V Bluecolor‐ 
GND Blackcolor‐ 
NC NotConnected‐ 
Beforeconnectingthepowerterminal,youneedtoconnect"+"terminaloftheDVMprobewiththe
GND terminal and then connect "–" terminal with‐48V to see if “‐48Vdc” voltage is present. After
confirmingthis,connectthepowerterminalwiththeterminaloftheterminalblockseenbelow.
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Figure5.2–Powerinterfacediagrm
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 NotethatBIUdoesnotoperateifthe"+"terminalandthe"–"terminalofthe‐48Vpowerare
reversed.

Whenyouconnect‐48VpowertotheBIU,usetheON/OFFswitchoftheMPSUlocatedatthefront