(2018-02-06, 16:26)mwaters Wrote: Although the Blue has a place to ground it, it is not necessary to ground it like System Red.
Sorry to disagree Mike - on my Blue system the interference from a near-by electric fence is reduced significantly when the earth is connected - Klaus is also seeing a similar reduction effect with noise. I saw Tobi mentioned that earth is not needed however in another post someone asked where the Earth on the Blue was and Ergon responded by pointing out where it was on the new 19.4 boards. This got me thinking and I experimented by connecting Earth - to my surprise the reduction in noise was immediate and returns as soon as I disconnect earth.
Cheers
Ian