Chapter 7 Earthing and Shielding
GFK-2958E
RSTi-EP User Manual
332
7.2
Potential Ratios
7.2.1
Basic aspects
As regards the potential ratios of a RSTi-EPsystem, the following aspects must be kept in mind:
•
The power supply of the network adapter and I/O modules as well as field power is provided
via the power supply at the power-feed module (PF)
•
A potential-free design is made possible through the use of an isolated power supply at the
system power supply and the field power supply
The block diagram shows the typical design of a RSTi-EP system. The power supply concept here
makes sure that, starting with a certain capacity utilisation, power refresh is implemented using
power-feed modules.
RSTi-EP Power Supply Concept
7.2.2
Potential-free Design
In a potential-free design, the reference potentials of control and load circuits are galvanically
isolated from each other. A potential-free design is necessary for the following:
––
Use of the power-feed module (EP-19xx), i.e. in all AC load circuits
––
DC load circuits that cannot be coupled
Potential-free installation depends on the type of earthing.
Содержание GFK-2958E
Страница 1: ...RSTi EP User Manual GFK 2958E November 2017 ...
Страница 23: ...Chapter 1 Introduction GFK 2958E RSTi EP User Manual 19 Notes ...
Страница 56: ...Chapter 3 Configuration GFK 2958E RSTi EP User Manual 52 Notes ...
Страница 166: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 162 EP 5111 Block Diagram EP 5111 ...
Страница 183: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 179 EP 5111 ...
Страница 184: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 180 EP 5111 ...
Страница 211: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 207 Frequency Counter EP 5212 ...
Страница 316: ...Chapter 5 Detailed Descriptions of I O Modules GFK 2958E RSTi EP User Manual 312 Notes ...
Страница 330: ...Chapter 6 Installation GFK 2958E RSTi EP User Manual 326 Notes ...
Страница 344: ...Chapter 7 Earthing and Shielding GFK 2958E RSTi EP User Manual 340 ...
Страница 345: ...Chapter 7 Earthing and Shielding GFK 2958E RSTi EP User Manual 341 Notes ...
Страница 385: ...Chapter 8 Web Server GFK 2958E RSTi EP User Manual 381 Notes ...
Страница 401: ...Chapter 11 Disassembly and Disposal GFK 2958E RSTi EP User Manual 397 Notes ...
Страница 413: ...Chapter 12 LED Indicators and Troubleshooting GFK 2958E RSTi EP User Manual 409 Notes ...
Страница 416: ...Chapter 14Accessories and Replacement Parts GFK 2958E RSTi EP User Manual 412 Notes ...