Renishaw TP-20 Probe Connection

Thanks to both for the info there, thats interesting that it supplies 12v.

I think I have found a way to do this, which actually was quite easy, I still need to actually test this circuit however!

Using the circuit shown here - electronics.stackexchange.com/questions/...g-5v-microcontroller

I have attached my revised circuit that should trigger the 24v input with the same transistor.