relay module with 4 inputs
this module is used to convert 4 inputs from open collector to relay output, with selection between NO and NC type. the finish is very professional, it is just what I expected, I had no problem assembling it, the module worked correctly I am very happy
Excellent experience from end to end.
Although it appears I may have made a couple design mistake, as usual the production and delivery was very well done. The black solder mask is very nice, and the PCB is very well CNCed as well. No com...