Designing interference-free controllers
Function Manual, 06/2014, A5E03461486-AB
9
Interference-free cable routing
3
This chapter describes the EMC-compatible classification of cables and cable routing for
bus, data, signal and supply lines.
3.1
Classifying cables into cable categories
Classify the cables into cable categories according to their sensitivity to interference coupling
and interference emission. The further away from one another cables of different cable
categories are installed, the lower the mutual influence by capacitive and inductive coupling.
The following table shows the cable categories into which you can classify your cables
accordingly.
Table 3- 1
Cable categories
Category A
•
Signal lines to I/O modules
•
Bus and data lines (for example, PROFIBUS, PROFINET)
•
Lines to HMI devices
•
Supply lines for extra-low voltages (< 24V DC or < 60V AC)
Category B
•
Supply lines with safe electrical isolation (SELV)
•
Supply voltages < 400 V
Category C
•
Supply voltages > 400 V
Summary of Contents for SIMATIC ET 200AL
Page 2: ......
Page 143: ......
Page 218: ......
Page 250: ......
Page 296: ......
Page 337: ......
Page 365: ......
Page 392: ......
Page 419: ......
Page 451: ......
Page 483: ......
Page 597: ......
Page 648: ......
Page 702: ......
Page 739: ......
Page 781: ......
Page 804: ......
Page 828: ......
Page 853: ......
Page 880: ......
Page 906: ......
Page 996: ...Diagnostics ...
Page 1121: ......
Page 1565: ......