Quote Originally Posted by m_c View Post
However, it's also an additional point of failure. If you put too much pressure on the terminals, it can cause the contacts to open up. I had an intermittent issue with a bank of inputs on a Konnect IO expansion board, and it turned out I'd put to much pressure on the common wire during installation, which had caused the contacts to open up and be intermittent.

Direct screw terminals vs pluggable connectors is a perennial debate, but there are pros and cons to both.
I had the same thing happen to me. Took me 3 days to find the fault.! 10 x 5 router was built and finished and on test, it had been cutting air for 5 hours then it E-stoped. Happened at the same point in code every time.? Turned out to be a connection on the gantry that opened up due to wire pressure and because the Cslabs controller is so sensitive it picked up the loose connection at that exact resonant frequency. Pulled my last follicle of hair out and Virtually re-wired the whole machine.!!

I only use Direct screw terminals now.!