Got my unit running on 1.23 for PWM and 2.5 for enable
(MKS SBase 1.2/1.3) NOTE THE SETTING: 2.5^ leave out the ! for pin inversion. you do not want to invert the pin.
Brian W.H. Phillips was right about the LED taking it to 24V when idle.
I pulled D14 and everything is hunky doree now…
I would be concerned if running an SBase board that this could potentially damage the circuit in the LPSU. Looking at a spare power supply I have here it looks like the L pin on the PSU is the cathode pin of an opto isolator. (photo transistor, opto coupler…) the tiny little led inside could definitely be damaged if it is connected to the 24v rail and should it fail internally the everything on the 5v rail on the SBase board could be destroyed. Do Brians zeiner diode trick or pull the diode. either way you shouldn’t run it without some mod or protection.