Proface PS4800 - 19 Panel PC" - Manual (Page 90)

Industrial Personal Computer Connections
90
Grounding
Overview
The grounding resistance between the Industrial Personal Computer ground and the
ground must be 100
Ω or less. When using a long grounding wire, check the
resistance and, if required, replace a thin wire with a thicker wire and place it in a
duct. In addition, refer to the table below for maximum lengths of various wire
thicknesses.
Ground Wire Dimensions
Precaution
Dedicated Ground
Connect the Industrial Personal Computer ground to a dedicated ground:
Wire Cross-section Maximum Line Length
2.5 mm 2 (AWG 13)
30 m (98 ft)
60 m (196 ft) round trip.
WARNING
UNINTENDED EQUIPMENT OPERATION
z Use only the authorized grounding configurations shown below.
z Confirm that the grounding resistance is 100
Ω or less.
z Test the quality of your ground connection before applying power to the device.
Excess noise on the ground line can disrupt operations of the Industrial
Personal Computer.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.
Industrial Personal
Computer