Re: External Interference from a Electromechanical Contactor
Posted: Tue Sep 13, 2016 6:42 pm
That power supply, and if you had used a USB charger, do not have any filtering that is appropriate for an industrial environment. I would use a better power supply but that still may not be enough. A proper line filter before any power supply would be a good idea.
Something like
http://www.digikey.ca/product-detail/en ... ND/4379938
The problem is this has to be put into a case. The ground connection is also important and must be used. The case needs to be grounded by the mounting screws.
I would go for an integrated filter and power supply. Like
http://www.digikey.ca/product-detail/en ... ND/3881228
And probably put an additional line filter in front of it.
I design industrial electronics for a living. Of course I would not have done what you have. But say I was just a hobbiest and I wanted to provide the functionality that you have provided. I would have use available off the shelf equipment. Do you have replacement boards available? (I hope not because what you have is pretty bad) But maybe what you have done is not so important (of value) if it fails.
Something like
http://www.digikey.ca/product-detail/en ... ND/4379938
The problem is this has to be put into a case. The ground connection is also important and must be used. The case needs to be grounded by the mounting screws.
I would go for an integrated filter and power supply. Like
http://www.digikey.ca/product-detail/en ... ND/3881228
And probably put an additional line filter in front of it.
I design industrial electronics for a living. Of course I would not have done what you have. But say I was just a hobbiest and I wanted to provide the functionality that you have provided. I would have use available off the shelf equipment. Do you have replacement boards available? (I hope not because what you have is pretty bad) But maybe what you have done is not so important (of value) if it fails.