On my CNC, I use NC switches for the X/Y/Z limits. I go this route so that if a wire happens to get cut or disconnected, it will act as a failsafe and trip the limit. The LEDs for the inputs of the PMDX-126, however, are on when the input-to-GND connection is closed. So, under normal operating conditions, all my inputs connected to the NC limit switches are turned on. Is it possible to reconfigure/reprogram the PMDX-126 to invert the logic on the LEDs and have them turn on when a limit switch is opened? If it can't be done, it would be a good idea on the next rev of the board to include that option. For now, I can make a separate board with an OC inverter or transistor on each limit switch to get the state I'm looking for.
