Advantech ADAM-5511, Manual, Page: 339 / 340

ADAM-5511 E-17
Appendix E
E.3 Noise Reduction Techniques
• Isolate noise sources in shielded enclosures.
•
Place sensitive equipment in shielded enclosure and away from
computer equipment.
• Use separate grounds between noise sources and signals.
•
Keep ground/signal leads as short as possible.
• 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
2
.
• 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
eliminate load-induced common mode noise.
Figure E-15: Noise Reduction Techniques