Eding CPU5A4E controller and Siemens G110 VFD.

[Web Goblin]

You can connect the cpu directly to the vfd. If you go onto Berts Eding cnc website and look at the cpu5a flyer, the link is at the bottom of the page, it shows the possible connections.
If you are really stuck then email Bert and he will help you out.

[EddyCurrent]

Now I see why you mentioned the solid state relay. Personally I would not be connecting the TOOL output directly to the vfd, I would attach a relay between TOOL and GND on the CPU (looks like you would need an external 24V supply), then I would connect the Normally Open contacts of that relay between vfd terminals 6 and 3 (then the vfd would have to be configured by it's firmware so that the input meant RUN FORWARD.
The main reason for using a relay, and it's the same with PLC outputs, is that it's easier and cheaper to change a knackered relay than it is to replace a knackered controller or PLC, etc. Volt Free contacts as they are called is the way to go for me. For similar reasons I would not be using the 24V supply from the vfd to drive a relay, it only supplies 50mA max.

[calgone]

Hi all,

Sorry for the late reply, been working.
I have attached the layout that I think I may go with.

The external 24v supply seems like a good idea.
I have already added a 5v supply for the cpu5 board.

Thanks for the help.