H3C S5120-9P-SI Installation Manual

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H3C S5120-9P-SI Installation Manual Manual pdf 41 page image

33Figure 41 Connect the AC power cord (C)Connecting an RPS DC power cordThe S5120-28P-HPWR-SI also supports RPS DC power input with the input voltage ranging from –52 V to–55 V. Follow these steps to install a DC power cord:Step1 Connect one end of the supplied grounding cable to the grounding screw on the rear panel of thechassis and the other end to the ground as near as possible.Step2 Keep the upside of the DC RPS plug on top and plug it in the RPS DC receptacle (see callout 1 in Figure42). (If you plug it with the upside down, the insertion is not smooth because of the specific structuredesign of the RPS DC receptacle and the RPS plug.)Step3 Use a flat-blade screwdriver to fix the two screws on the RPS plug clockwise to secure the plug to the RPSDC receptacle (see callout 2 in Figure 42).Step4 Connect the other end of the RPS DC power cord to the external RPS power supply system (–54 V/25 Aoutput).Step5 Check whether the RPS LED on the front panel of the switch is ON. If the LED is ON, it shows the powercord is properly connected.Figure 42 Connect an RPS DC power cord to the S5120-28P-HPWR-SICAUTION:• Make sure that the grounding cable has been properly connected before powering on the switch.• The length of the DC power cord must be less than 3 m (9.8 ft).