Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 423)

Section 7C
Power Distribution and Wiring Guidlines
7C-5
Figure 7C.3
Non-Isolated Conductive Type Noise Suppressing
LC Filter
RC Noise Suppressor
L
L
L
L
C
C
C
C
R
R PE
PE
11239-I
Figure 7C.4
Isolated Insulation Type Noise Suppressing
Noise Cutting Transformer
Isolation Transformer Shielded Transformer
11240-I
These noise filters and isolation transformers have different effects
depending on noise characteristics (common mode noise, normal mode
noise, high frequency noise, low band width noise, high band width noise,
etc.). Therefore, select the appropriate noise suppression parts meeting the
noise characteristics. Install these parts as close to the controller as
possible for them to be most effective.