Ground the chassis – Rockwell Automation 1756-xxxx ControlLogix Chassis and Power Supplies Installation Instructions User Manual
Page 23
Rockwell Automation Publication 1756-IN005C-EN-P - March 2014
23
Install Chassis and Power Supplies
Chapter 1
Ground the Chassis
Complete these steps to properly ground your chassis.
The following figure shows an example grounding configuration. After you
complete the grounding steps, your system looks similar to this figure.
Figure 11 - Grounding Configuration Example
Use these guidelines when connecting the grounding:
• Use a steel enclosure to guard against electromagnetic interference (EMI).
• Install a bonding wire for electrical contact between the enclosure door
and the enclosure; do not rely on the hinge.
• Make sure the enclosure-door viewing window is a laminated screen or a
conductive optical substrate (to block EMI).
Grounding Step
Page
Connect the Functional Earth Ground on the Chassis
Connect the Protective Earth Ground
Connect the Grounding Conductors to the Ground Bus
Connect Ground Bus to Grounding-electrode System
TIP
To minimize the resistance between the chassis and ground connection, keep
wire lengths as short as possible.
Functional Earth Ground,
Protective
Earth Ground,
Cabinet
To Grounding-electrode System
45805
8.3 mm² (8 AWG) solid or
stranded-copper wire
rated at 90 °C (194 °F) or
greater
2.1 mm² (14 AWG) solid or
stranded-copper wire
rated at 90 °C (194 °F) or
greater
Ground Bus