Digisol DG-GS1528HP/C Connecting And Configuring

Connecting the Switches which offers 6Kv surge protections to Earth ground
To meet safety and electromagnetic interference (EMI) requirements and to ensure proper
operation, All the Switches must be adequately grounded before power is connected. To ground the
switch, you must connect a grounding cable to earth ground and then attach it to the rack grounding
points.
Systems that do not use electrical grounding components can experience either complete system
failures or intermittent problems that are hard to diagnose. The surges and spikes can cause
permanent damage, like how a nearby lightning strike can burn electronics and wires. They may also
cause small latent failures that erode equipment and cause permanent damage over time.
Please see below images about grounding connections from switch. If without grounding cable then
the lighting or surge will damage the chip or protection components.
Figure 1 illustrates how a grounding cable connect to the PoE Switches.