H3C S5120-9P-SI Installation Manual

Contents

H3C S5120-9P-SI Installation Manual Manual pdf 37 page image

29Connecting the grounding cableCAUTION:• Correctly connecting the switch grounding cable is crucial to the lightning protection andelectromagnetic susceptibility (EMS) of a switch.• The power interface and grounding terminals in this section are for illustration only.The power input end of the switch is connected with a noise filter, whose central ground is directlyconnected to the chassis, forming the so-called chassis ground (commonly known as PGND). This chassisground must be securely connected to the earth so that the faradism and leakage electricity can be safelyreleased to the earth, enhancing the EMS capability of the switch.When a grounding strip is availableWhen a grounding strip is available at the installation site, attach one end of the yellow-green groundingcable of the switch to the grounding screw on the grounding strip (the grounding screw and thegrounding hole are on the rear panel of the switch and are marked with a grounding sign). To do this,follow these steps:Step1 Remove the grounding screw from the rear panel of the switch chassis.Step2 Put the supplied OT terminal of the grounding cable on the grounding screw.Step3 Fasten the grounding screw, which is attached with the OT terminal of the grounding cable, into thegrounding screw hole with a screwdriver.Figure 35 Connect the grounding cable to the grounding hole of switch(1) Rear panel of the switch (2) Grounding sign(3) Grounding hole (4) OT terminal(5) Grounding cable (6) Grounding screwTo attach the other end of the grounding cable to the grounding strip in the equipment room, follow thesesteps: