We have about 25 networks in our plant and have two in particular that have been giving us trouble on/off for months now. Yesterday we were discussing these problems with our electrical contractor. He told us that another firm in the area uses "chokes" on all of their DeviceNet connections. They strip the outer protective layer and shielding off, slip the "choke" ring on the cable, and then terminate the five network wires as normal. I'm putting the word "choke" in quotes because that was the what the electrical contractor called them and I'm not sure that is the correct term. He said they looked like little metal donuts that the cable was passed through.
Has anyone ever heard of/seen this being done?
Does it make sense?
To me it sounded like they were trying to cancel out any induced voltages on the DeviceNet wires/cable. But isn't that why proper grounding is so important? I should note here that all of our systems are grounded correctly according to the AB Media guide for DeviceNet.
Any feedback or discussion is welcome.
Has anyone ever heard of/seen this being done?
Does it make sense?
To me it sounded like they were trying to cancel out any induced voltages on the DeviceNet wires/cable. But isn't that why proper grounding is so important? I should note here that all of our systems are grounded correctly according to the AB Media guide for DeviceNet.
Any feedback or discussion is welcome.