Raritan MCD-LED17 series - Launch Upgrade Utility for MDCIM;MDUTP

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If you want to prevent any electrical shock, you can use the ground screw
on the rear panel to provide a safe electrical path to the ground.
Note: Currently only MCD-LED KVM drawers have the ground screw
while MCD switches do NOT have it.
To prevent any potential shock hazard:
 Connect the ground screw to a wiring system or wiring device.
Appendix B Ground Screw