Author Topic: Question about shielding  (Read 9550 times)

Joel Moore

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Question about shielding
« on: April 08, 2004, 08:11:17 AM »
Ok, fundamentals here.

1) When using shielded cable you only connect one end of the shield, right?

2) Does the shield connect to the chassis or should it connect to DC ground?

3) If answer to #2 above was chassis then should I expect trouble if AC ground is also connected to the chassis?

Tim C

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Re:Question about shielding
« Reply #1 on: April 08, 2004, 08:58:11 AM »
1, Yes only connect one end. I would connect it to the end with the best grounding system. This usually means at the plc or DCS system, not the transmitter.
2, As long as the DC common is connected back to ground somwhere I think it would be ok.
3, The AC ground Should be connected back to ground too, but you need to make sure you have a good ground. If you dont you could get alot of noise if the AC line shorts to ground.
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« Last Edit: April 08, 2004, 09:05:22 AM by Tim C »

Joel Moore

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Re:Question about shielding
« Reply #2 on: April 08, 2004, 11:31:59 AM »
Thanks, I'll look into that.