Hello All!
I have a question how to drive form Mach3 with using Pokeys 55U servo drivers witch have Step and dir inputs (inputs with open collector) for example Mitsubishi Melservo series. Does Pokeys 55U have outputs to drive servodrivers (step dir mode) with open collector? Were to connect?

Hi, Alex

Please take a look at the Pulse engine manual (http://www.poscope.com/productattachments/index/download?id=77). There are all pins listed.
For drivers that require 24V signals generated by open-collector outputs, you will need additional 74HC240 (inverter) and ULN2803 (open-collector driver).