H3C S3600 Series Installation Manual page 24

Figure 3-12 Grounding through the AC PE wire
(3)
(4)
(1) AC-input
(4) PE wire
For a DC-powered switch, if none of the first two conditions is available, ground it through the return
wire (RTN) of the DC power supply. In this case, make sure this RTN wire is well connected to the
ground at the DC output of the DC power cabinet.
Figure 3-13 Grounding through the PGND of a power cabinet
(1) AC/DC power
cabinet
(5) RTN
(9) Grounding screw
(1)
(5)
(2) Grounding screw
(5) AC-input (with 3-wire cable)
(2) -48V strip
(6) PGND strip
(10) Ethernet switch
3-9
(6) (2)
(3) -48V
(7) Grounding
(11) DC-input
(3) Power transformer
(6) Ethernet switch
(4) RTN strip
(8) Ground wire