Application Planning; Supplementary Electrical Conditions; Grounding Concept - Siemens SINUMERIK ONE NCU 1740 Equipment Manual

Application planning

5.1

Supplementary electrical conditions

5.1.1

Grounding concept

Components
The SINUMERIK ONE system consists of several individual components that have been designed
so that the system complies with the appropriate EMC and safety standards. The individual
system components are:
• Numerical Control Unit (NCU):
• Machine Control Panel MCP, Machine Push Button Panel MPP
• Keyboard
• Operator panels (operator panel front + TCU / SIMATIC IPC for SINUMERIK)
• Distributor box and handheld unit
• S7-1500 I/O devices
Grounding measures
The individual modules are attached to a metal cabinet panel. Insulating paints on the mounting
points must be removed.
It is permissible to have a cluster of operator components for ground connection / equipotential
bonding.
Example: The control panel on the swivel arm.
It is sufficient in this instance to connect the ground connections of, for example, the SIMATIC
IPC for SINUMERIK, TCU and operator panel front using a cable and to route a shared grounding
conductor to the central ground connection in the control cabinet.
More information
More information about EMC installation guidelines can be found under:
• Configuration Instructions, EMC installation guideline
support.industry.siemens.com/cs/document/60612658/emc-design-guidelines-
configuration-manual-01-2012?dti=0&lc=en-WW)
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA
(https://
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