↳ DXF Art - DXF Clip Art File Sharing Forum.DXF DESIGN & PROJECT PICTURE SHARING FORUMS.WELCOME CENTER, GOOD INFO & MEET OUR SPONSORS.same with using 24V for non-step and direction signals (general I/O's outside of the control cabinet). hence for a high electrical noise environment like plasma. USB hates any form of ground loop and there is also a limitation on transmission distance of I think from memory 10 meters. choose something else with an Ethernet port (such as the UC400ETH, UC300ETH or AXBB-E). so if you have a high frequency start plasma cutter.
The other negative (for me) is that it is USB. it is only one LPT port of inputs and outputs (12 outputs and 5 inputs).so if you need additional inputs and outputs then you need something else such as the UC400ETH using an IDC 26 to 25pin LPT ribbon cable.
and 3.3 Volts to a 5V optocoupler is just about the "ON" voltage which can be a bit of a grey area with optoisolators / optocouplers that are designed for 5V, given there is an ON voltage range and an OFF voltage range. Laptops (with LPT ports ) and some LPT addin cards can be problematic these days as they are not all TTL (5Volt and Zero Volt DRIVEN) logic but use 3.3Volts. The UC100 just provides the I/O same as what the parallel port did using TTL (5Volt / 0Volt) driven logic.
Its a 50 volt four axis stepper driver that has a parallel port input. What does the gecko g540 do exactly? I thought it was a driver for the servos but after reading this I am not sure.