Rockwell Automation System Design for the Control of Electrical Noise - Manual (Page 68)

Publication GMC-RM001A-EN-P — July 2001
7-10 Power Distribution
Linear PSU Mounted in Dirty Zone
In the figure below no AC line filter is required because the linear PSU
does not generate noise and the AC line noise is filtered by the DC
filter.
Figure 7.9
PSU mounted in Dirty Zone
24V dc
Linear PSU
AC
Filter
+24V 24V com
Dirty Zone
Clean Zone
Clean Load
Segregation
De-coupling
capacitor