PWM Driver Module, DC 12V 24V 48V PWM 4-Wire Fan Temperature Controller with Digital Display 2 Channel Temperature Governor for PC Fan/Alarm

This is what I have figured out. It might not be everything.You have two different setting menus. A short press of OK, gives you fan low speed settings. A long press of OK, gives you the temperature control and alarm menu. A short press of OK will advance you to the next item in the menu.Low speed menu. Menu cycles Fan1 -> Fan2 -> Main display.Low speed – The lowest speed you would want the fan to run. The values are 10 to 100. On my fan 10 was just above its minimum speed and 100 was just about its maximum speed. Note: If you are going to be using the alarm option, make sure the low speed spins the fan faster than 375rpm.Temperature & alarm menu. Menu cycles Fan1 low temp -> Fan 1 high temp -> Fan 1 alarm -> Fan2 low temp -> Fan 2 high temp -> Fan 2 alarm -> Main display.Fan Low Temp and High Temp– If the temperature is at or below the Low Temp setting, the fan will run at the low-speed setting. If the temperature is at or above the High Temp setting, the fan will run at 100%. Anything between will be scaled between low-speed and 100%.Alarm – you have two settings bon and bof. BON will enable the low-speed alarm on the selected fan. If the fan goes below 375rpm it will sound an alarm. BOF will disable the alarm.

Worked well for a week and then the LED display died (12V operation). Bought a replacement, only half of the display works…

I have had several of these modules controlling custom built attic fan modules for nearly a year now. These modules use 4 computer fans each, to blow hot air out of my attic ridge vent. The operating conditions range up to over 150 degrees F. I have them set up to run at min speed when cool and max when over 120 degrees or so. Once you figure out how they work, you are all set. One thing to know is that the lowest setting runs the fans at about 10%. You cannot have a temperature where the fans are totally off. I suspect this is to work around startup issues. Also, the readout is in Centigrade. Not a showstopper but annoying non the less. A small firmware update would correct both of these issues and make the unit more versatile. The units have stable firmware and have run without a single hitch. Units work great to keep projects cool by ramping up the speed the hotter it gets.

This product works great just wish came with programming instructions but it’s easy to figure out after pressing buttons. I purchased this as an alternative to Steve Meade TM-1 for my amp rack. This product would be even better it had a remote wire for the buttons and display so I can see the temperature up front in my car but this will due for now. The suggested 120mm fans works well and very quiet. Looks like it has a capacitor inside for setting memory. There is two temperature sensors which control the fans separately so I guess I’ll install them in the same location for push pull air flow control. Saved around 100$ with this alternative.

I found the programming of this little fan controller a tad confusing, but after some experimentation, I think I made sense of it. I wasn't expecting anything different, to be honest. It's a simple device, made for projects like mine. I'm using it inside a large PC chassis to control air flow and help keep noise levels down. I really like that it has two zones (two thermometers, two separate fan controllers).It's working beautifully for my project! I will definitely buy another for the next one.

I have connected it to two fans correctly. And no matter what you put the settings on, the fans run at full speed no matter what. I put low on 30 and high on 40 and even when it's at 22°. They are both at full speed. They should not even be on at all, or very low. Which means this thing does not work. Like another guy said on here

Good quality very compact

Hooked up power to unit but unit would not power up. Hopefully better luck with exchange. No instructions included.Edit: Returned the original and got a replacement and same issue. Returned again and went with different controller.