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Keep the contactor's NC aux in the relay's feedback loop whichever way you go. And once the stopping job moves from the contactor to STO you have chan...

What's the e-stop meant to do here, take power off the motor or just stop it? Does the drive have its STO wired, S1 and S2 to the relay, or is the rel...

Don't raise it, I reckon. A button that needs three seconds to agree with itself is a broken button, you would just be hiding it.

That's the whole problem, and no, EDM stays on. The loop is 24V, NC on K1, NC on K2, back to the safety input. Closed only with both contactors dropp...

What feeds the L+ terminal of those two bases, and is it the same 24 VDC as the rest of them? Trace it in words for me: from which supply, through whi...