Connecting a K6714 to a K8055

Like the subject, but I can’t get it to work. The usb board connects fine and its working OK. Same for the relais board, it works just fine.
I’d like to flip the relais on the relais board zo I connected the usb board to the relais board by connecting the digital outputs to the relais board terminals. The VB terminal goes from the relais board onto the clamp on the USB and both the GND’s are connected together between usb and relais board. When flipping the digital outs on the usb board nothing happens.

What am I missing?

TIA!

Make sure you did not mount IC1 and IC2 on the K6714. Instead, replace them with wire-jumpers, as indicated in the K6714 manual.

Hey

Thanks for that! It worked with the bridge,… I figured from reading the manual I ought to leave them IC’s out and that’d be it.

Thanks, again.

Yves