C.3 Noise Reduction Techniques
•
Isolate noise sources in shielded enclosures.
•
Place sensitive equipment in shielded enclosure and away from
com- puter equipment.
•
Use separate grounds between noise sources and signals.
•
Keep ground/signal leads as short as possiblC.
•
Use Twisted and Shielded signal leads.
•
Ground shields on one end ONLY while the reference grounds are
not the same.
•
Check for stability in communication lines.
•
Add another Grounding Bar if necessary.
•
The diameter of power cable must be over 2.0 mm
•
Independent grounding is needed for A/I, A/O, and
communication network while using a jumper box.
•
Use noise reduction filters if necessary. (TVS, etc)
•
You can also refer to FIPS 94 Standard. FIPS 94 recommends that
the computer system should be placed closer to its power source to
elimi- nate load-induced common mode noisC.
ADAM-5000/TCP User's Manual
Grounding Reference
Figure C-15: Noise Reduction Techniques
Appendix C
2
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C-17