Grounding - Pro-face PS-4700 Series User Manual

Industrial Personal Computer Connections

Grounding

Overview
Ground Wire Dimensions
Precaution
Dedicated Ground
54
The grounding resistance between the Industrial Personal Computer ground and the
ground must be 100  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.
Wire Cross-section
2
2.5 mm (AWG 13)
UNINTENDED EQUIPMENT OPERATION
Use only the authorized grounding configurations shown below.

Confirm that the grounding resistance is 100  or less.

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.
Connect the Industrial Personal Computer ground to a dedicated ground:
Industrial Personal
Computer
Maximum Line Length
30 m (98 ft)
60 m (196 ft) round trip.
WARNING