Map the interference environment
Mark drives, motors and switching power equipment near the signal route. Show cabinet entries, parallel runs and grounding points. Record when the fault occurs so the sample test can reproduce the relevant operating conditions.
Specify the shield termination
Follow the equipment’s EMC guidance for shield bonding and connector termination. Do not apply one universal rule about connecting one or both ends. Document the contact method and keep protective earthing requirements separate from functional shielding.
Verify the whole installation
Agree checks for the assembly’s specified shield connections and signal operation in the machine. Record routing and grounding changes during troubleshooting. Have the responsible electrical engineer approve the final arrangement before repeating it across equipment.
Common mistakes
- Changing shield termination without checking the equipment grounding scheme.
- Testing communication only while nearby drives are switched off.
What to include in your inquiry
- System grounding and shield termination diagram
- Cable route and nearby interference sources
- Connector, enclosure entry and shield contact details
- Observed fault conditions and acceptance test plan
Use this checklist to prepare a specification. Confirm the final assembly against your equipment documentation and the agreed drawing.