
Grounding via reference potential
The reference potential of the SIMATIC CN 4100 communication system can be connected to
ground. A grounding screw is used for this.
Notes on the reference potential (Page 27)
Application (providing floating reference potential):
• Removing the grounding screw (Page 30)
Grounding via cable
• Grounding the rack with a cable (Page 32)
• Grounding the module with a cable (Page 34)
5.4.4
Grounding
5.4.4.1
Grounding connection
Definition
The ground connection is used to discharge the current to ground via a connection with good
electrical conductivity. This is intended to minimize different electrical potential.
Description
• Low-resistance ground connections reduce the risk of electric shock in the event of a short-
circuit or defect in the system.
• Low-resistance connections (large surface area, large contact area) reduce the effect of
interference on the communication system or the radiation of interference signals. Effective
shielding of cables and devices also makes a significant contribution to this.
CAUTION
Protective grounding
All Class 1 protective devices and all major metal parts must have protective grounding. This is
the only way to protect operators from electric shock. It also dissipates interference transmitted
through external power supply cables, signal cables, or cables to I/O devices.
Installation
5.4 Basics for mounting
CN 4100 Communication System
26
Equipment Manual, 10/2021, A5E50871363-AA
Содержание SIMATIC CN 4100
Страница 6: ...Table of contents CN 4100 Communication System 6 Equipment Manual 10 2021 A5E50871363 AA ...
Страница 8: ...Security information CN 4100 Communication System 8 Equipment Manual 10 2021 A5E50871363 AA ...
Страница 50: ...Commissioning 7 2 Phases CN 4100 Communication System 50 Equipment Manual 10 2021 A5E50871363 AA ...
Страница 56: ...Operation 8 3 LEDs of the RJ45 port CN 4100 Communication System 56 Equipment Manual 10 2021 A5E50871363 AA ...