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.
• 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.
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 connect protective earth to the OmniCore controller
cabinet, see Connecting incoming mains and protective earth to the controller on
page 84.
For information on how to connect protective earth for the manipulator, see the
corresponding product manual.
Continues on next page
76 Product manual - OmniCore V250XT Type B
3HAC087112-001 Revision: A
© Copyright 2023-2023 ABB. All rights reserved.
3 Installation and commissioning
3.5.2 Connecting cables to the controller
Continued
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