Huawei DBS3900 Installation Manual page 320

DBS3900 (Ver.B)
Installation Guide
1.
2.
Figure 9-21 Installing a BBU power cable
Step 3 Route the cable by referring to
cable.
Step 4 Label the installed cables. For details, see Attaching an L-Shaped Label.
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Installing an RRU Power Cable
An RRU power cable feeds -48 V DC power into an RRU from a DCDU-03B.
Context
Table 9-4
Issue 06 (2011-09-15)
Link the 3V3 power connector at one end of the BBU power cable to the -48 V port on the
UPEU in the BBU, and then tighten the screw on the connector until the tightening torque
reaches 0.25 N·m.
Link the OT terminals on the blue and black wires at the other end to the wiring terminals
labeled NEG(-) and RTN(+) near the LOAD6 label on the DCDU-03B respectively.
NOTE
A BBU power cable must be connected to each UPEU if two UPEUs are installed in the BBU. The 3V3
power connector at one end of each BBU power cable is connected to the –48V port on each UPEU in the
BBU, and the easy power receptacle (pressfit type) connectors at the other end are connected to the LOAD6
and LOAD8 ports on the DCDU-03B, respectively.
lists the specifications of RRU power cables when a DCDU-03B supplies power.
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9 Outdoor Scenario with DC Power Supply (BBU Installed
9.4.1 Cabling Requirements, and then use cable ties to bind the
in an OMB)
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