YOKOGAWA FA-M3V e-RT3 Plus, Hardware Manual

Page: 180 / 274

A3-20
IM 34M06C11-01E
A3.4 Noise Control Considerations
 Separating Cables from Motive-power Lines
Route motive-power lines so that they are no closer than 20cm to the FA-M3 and all
signal lines connected to the FA-M3. If this is not feasible, route the motive-power lines
through a grounded metal conduit.
20 cm
or farther
20 cm or farther
FA-M3
GND
FA-M3
Metal conduit
Motive-power lines
FA030401.VSD
Figure A3.17 Example of Separating Cables from Motive-power Lines
 Protecting Power Supply Module against Noise
- Form the power line into a twisted pair and route it through the shortest distance
possible.
- The power supply module of the FA-M3 contains a noise filter and therefore has a
noise immunity level sufficient for noise levels anticipated in general applications.
If the module is to be used in an exceptionally noisy environment however, an
additional ferrite core , noise filter or a noise cutoff transformer should be located
between the power source and the module.
Figure A3.18 Example of Power Supply Circuit Noise Control