7i97 hookup help

No, there is no power supply involved on the inhibit side
(If grounding the inhibit line disables the drives)

Relay NC ---> Drive Inhibit
Relay COM -->Drive GND

And you're are basically shorting your power supply by doing it this way image missing /media/kunena/emoticons/w00t.png

See: The NC and COM contact from your relay are normally closed (eg. connected together inside the relay) . The full circuit you have is: 12V+  --> Relay NC --> Relay COM --> ground.  This is doing the very same as connecting directly the 12v+ to ground  (Pouf!!!)... Unless, of course, the relay is being kept activated. (Then Pouf!!! once the relay is deactivated)

Like this?    

No, the relay NC and COM contacts connect to
the drives inhibit and GND and no flyback diode is used there.

There is no connection at all from the drive to the ENA lines,
the ENA lines are used to drive the relay coil (the relay coil has the flyback installed)

I will try and draw a simple schematic later today

Note that diode polarity is critical (band to +12V) , you will damage the 7I97 if it is installed backwards



Note that the relay pin numbers are meaningless unless you are using an identical relay

Can that relay be a SPDT? Also I’m not familiar with electrical symbols and was wondering where it’s showing to hook to on the relay. NC, NO, and Common. This is what’s on my SPDT relays anyway. If this won’t work I will purchase the DPDT