24CAUTION:• Use the supplied PGND cable (yellow-green PGND cable).• Connect the PGND cable to the earthing system in the equipment room. Do not connect it to a fire mainor lightning rod.Follow these steps to connect the PGND cable:Step1 Take out the PGND cable from the package.Step2 Remove the grounding screws from the grounding holes on the switch chassis (the grounding holes arelocated at the rear of the chassis, as shown in callout 2 on Figure 18.).NOTE:The PGND cable provided with the S7500E series is compliant with the NEBS standards.Step3 Fasten the grounding screws, which are attached with the dual-hole OT terminals of the PGND cable,into the grounding holes of the chassis.Step4 Connect the other end (OT terminal) of the PGND cable to the grounding post of the grounding strip, andfasten the PGND cable to the grounding strip with the hex nut.Figure 18 Connect the PGND cable to a grounding strip1234561: Fix the grounding screws with dual-hole OTterminals to the grounding holes2: Grounding holes3: Grounding strip 4: Grounding post5: OT terminal 6: Hex nutGrounding the switch through the PE wire of an AC powersupplyIf the switch is AC powered and no grounding strip is available at the installation site, you can groundthe switch through the PE wire of the AC power supply, as shown in Figure 19.
