Control.com - Nerds in Control

Dear forum,

I would to ask about standard for panel internal wiring regarding to analog I/O panel internal wiring (mA, voltage). I mean, for internal wiring which connect analog I/O module to panel termination, does we have to use shielded cable instead of NYAF cable? What is standard for this matter? As far as I know, shielded cable only needed to connecting analog device at field to panel termination, not for internal wiring from analog I/O module to panel termination.

Thanks a lot in advance.

Regards,

Aan

It depends on how noisy your environment is. I would always at least consider it because it's by far the easiest and most accurate way to deal with noise. If I need the full accuracy of the A/D, then I would shield as a matter of course. And it must be done properly or it can be worse than no shielding. This is from long experience with analog electronics. If you ever put a scope on your panel wiring, you wouldn't hesitate to shield anything low level.

Regards
cww

Another advantage of using shielded cable, it forces you to keep your loops tidy, not just jump all over the place.

Roy