Trying to fit 2 MPG

[Ger21]

The boards are powered by a 24 volt power source but also have a 5 volt usb input . So clive are yours wired in any way diferent from mine.

So you do have a 24V supply connected to the board? If not, the inputs do NOT work.

[keith wainwright]

Yes 24 volts to both boards . All the other inputs work because the machine works fine . I am going to check diagnostics now

[Clive S]

Yes 24 volts to both boards . All the other inputs work because the machine works fine . I am going to check diagnostics now

How have you wired them? Did you put a current limiting resistor in series ?

[keith wainwright]

Yes I put one end in the bob and the wire to the other tail on both A and B