Rockwell Automation 6189x Integrated Display Industrial Computers User Manual - Manual (Page 36)

36 Rockwell Automation Publication 6181P-UM003A-EN-P - May 2014
Chapter 2 Installation
Functional Ground Screw Functional ground screw requirement depends on the power source.
If using the functional ground screw, connect the computer to earth ground by
using a 1.5 mm
2
(16 AWG) or larger external wire. Use a ground wire with green
insulation and a yellow stripe for easy identification.
AC Power Models
The pre-installed functional ground screw is not required for safety or regulatory
compliance. AC power models are already grounded through the AC power
cord. However, if a supplemental ground is required, use the functional ground
screw in the I/O port panel of the computer.
DC Power Models
The pre-installed functional ground screw is not required for safety but is
required for EMC regulatory compliance.
Figure 17 - Functional Ground Screw Location
Non-display Models Display Models