alesh
Well-Known Member
Thanks for the explanation it makes sense and you're right. It also explains why it's required to have exactly 10V.It's not just PWM though. You can also give it a 1-10V signal. ie 5V is 50% then. So if you do PWM at 5V how is it going to know that you mean 100% from 5V PWM or 50% from 5V in the 1-10V range?
My fan has the same specs (0-10V, 10V PWM or a pot meter) and when I measured the voltage it simply converted the 10V PWM into a voltage between 0 and 10V (or actually 1-10V for these drivers). That's a very simple conversion and it makes it really easy to work with all three incoming types of signal.
I'm not just guessing here, I actually built a fan controller that does this using a tiny Arduino (like in the photo a bit higher, but then on a PCB and in a box and a temp/RH sensor connected).
Makes sense that the Mean Well drivers work the same seeing how they have the same specs.
It's really is not TTL. How would a 0-10V signal or a potmeter work with a TTL input? It really only works with a 0-10V signal internally. The 10VPWM and resistor input are both converted to a voltage in that range.
I used PWM from Arduino to dimm LDD buck drivers. Their PWM input is different from the dimm input on MW AC drivers as I'm reading in the data sheet.