ABB Robotics OmniCore C90XT Product Manual page 69

Ground and screen connections
The task of the grounding system is twofold - protective and functional. The primary
task is to serve as protective earth (PE) for personal and equipment safety. The
secondary task is to serve as a return path for common mode current.
For further information refer to EN 60204-1 and UL 1740.
Grounding requirements
The controller cabinet ground must come from the mains power supply PE.
For requirements on the marking of the supply ground connection inside the control
cabinet refer to UL 508C. For further details on how grounding systems should be
designed refer to IEC 61000-5-2. For details of cross-sectional area of PE refer to
IEC 60204-1.
Grounding installation
For information on how to install the ground for the manipulator, see the
corresponding product manual.
Examples
The following figure shows 2 examples on how the ground and the signal cable
screens can be connected:
xx1200000960
Product manual - OmniCore C90XT
3HAC073706-001 Revision: E
• The grounding cable color shall be green-yellow.
• The ground for the controller cabinet, robot manipulator and peripheral
devices must be the same, preferably an equipotential ground grid (mesh).
• Ground connection points must have stable inter-metallic bonding, like screw
fixation. Paint, dirt, rust, and other insulating material must be removed from
the contacting surfaces.
Control cabinet
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3 Installation and commissioning
3.5.2 Connecting cables to the controller
External unit
Example 1
Example 2
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