Dc Power Cables - Huawei Quidway S3700 Series Manual

Quidway S3700 Series Ethernet Switches
Hardware Description

5.1 DC Power Cables

A DC power cable transmits DC power to the switch.
Applications
A DC power cable connects the following two interfaces:
l
l
Appearance and Structure
The black -48 V DC power return wire and the blue -48 V DC power cable are shown in
5-1
Figure 5-1 -48 V DC power return wire
Issue 02 (2011-11-21)
Input power jack on the chassis
Output power interface on an external power system
NOTE
A black -48 V DC power return wire (RTN) is connected to the RTN(+) end of the DC power supply. A
blue -48 V DC power cable is connected to the NEG(-) end of the DC power supply.
and Figure 5-2.
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5 Cables
Figure
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