Mesa 7i92 board config with BOB

That BOB needs 2 power supplies, and the optos are slow.

Like Tommy said you need 2 supplies, I think you need a field supply between GND and VDD.

Again, this also requires 2 power supplies.
You should really read the manuals, although they are usually not much help being China cr@...

Both BOB seem to require short to ground.
Make a simple config using StepConf, just so you can start Axis GUI with it, then on the "machine" menu click on "show hal configuration", there on the left side click on "pins" then "parport",
On the right side click on the "show" tab,
On the left side click on the 10 in, 11 in, 12 in, 13 in, 15 in,
Now on the right side you can see the LED change color when you short an input to GND on the BOB.