Procool SP640X

Temperature controlled Quiet 1U Fan System


Add a slave fan to this system for additional cooling or for controlled airflow. The Slave fan will come with a special cable to connect to the main panel controller. Both fans will then be temperature controlled. Set one up as intake and one as exhaust for best cooling results.
Several additional fans can be added to the main fan system. Call us for details.

model SP640X
Optional Slave fan model SX640

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  • Description
  • Specifications
  • More Info
  • Reviews

The PROCOOL SP640X is a temperature controlled, quiet 1U rackmount fan system.

The SP640X is the professional's choice for a 1U temp controlled silent cooling option.
Featuring 6 SX40 Silent fans that produce a moderate airflow with extremely low noise.

Additional fans can be connected to the SP640X for more cooling or add an exhaust or intake for controlled airflow.
See the Multi-Fan page for details about slaving fans in a system.

Available in both intake and exhaust versions.
The Intake model SP640X blows air into the rack.
The Exhaust model SP640X-E pulls air from the rack.

Quiet operation - 21.77 dBA
Medium Airflow - 36 CFM
3 Year Warranty


Fan Controller Connections

Thermal Probe

Fan Controller:

User sets the controller's on and off temps to start and stop the system. Set a Global temp that will control all 4 fans together and/or set individual temps for each fan.
Each of the 4 fan power connectors are numbered 1 thru 4 corresponding to the front panel LED indicators. When the LED's are on that fan will be on. When the LED's are off those fans will be off.
Global setting: Front panel LED's for fans 1-4 are all on.
Individual setting: Front panel LED on for the selected or operating fans.

Typical start temp is about 80-85F. Off temp at or slightly above room temp. These settings can be adjusted for optimal performance. The controller has a temp sensor that should be located on or near the heat source, or can be located at the top of the cabinet for an ambient reading. This temp is displayed on the controller during operation for easy monitoring. Or, the display can be shut off during operation. (See Operating instructions)

Programming Temperature profiles:

Set the Global range higher than individual fan settings. If the highest individual temp is for example 90F set the Global temp to 92F or higher. If the Global temp is set to start at 85F then any fans set to start at 90F they will start when the Global start point of 85F is reached. Likewise if using the Global setting, make sure all individual settings are set outside of the Global range. The same rule applies for the OFF settings.

See Operating Instructions for more details

fan model SXT80

Procool SX40 Fans

Procool model SX40 fans are the quietest for the 1U rack systems.
The special blade design increases airflow and reduces noise.
Airflow 6 CFM at 3200 RPM and Noise only 14 dBA per fan.

power supply

Power Supply Model PSW-12V2A

Input: 100-240 VAC
Output: 12VDC
AC plug type: NEMA 1-15P
DC Cable: 36 inch with 2.1mm barrel plug

Panel Size: (1U) 19" x 1.75" x 1.5"

SX40 Data sheet
SX40 Air Pressure Chart

Fan controller Diagram

Panel color/material: black/metal
Fans: 6
Fan Size: 40mm x 40mm x 20mm
Fan Speed: 3200 RPM
Air Flow: 36 CFM
Noise: 21.77 dBA
Bearings: FDB, fluid dynamic bearings
Fan Thermistor wire length: 24"
Controller Thermal Probe length: 24" (48" available)
Power Supply: 100-240 VAC - 12 VDC
Power Supply Cable length: 36"
Power Supply Plug Type: NEMA 1-15P
Current draw: 0.18A
Power consumption: 2.16w
Grills/Guards: Black Wire

Installation Instructions

Mount the fan in the desired location. Connect the power supply to the fan panel with the mating plugs. Connect the power supply to AC power. The power supply accepts from 100 to 240VAC.

Operating Instructions

Data sheet downloadSP640X Operating Instructions.pdf

Care and Maintenance

To maintain optimal performance, keep the fans clean. Canned air works well. If the fans are used outdoors or in a dusty environment is recommended to clean the fan blades as needed to keep clean.

Blade Removal

For cleaning and maintenance the blade prop is removable. Remove the fan grill and grasp the blade prop and pull straight out of the fan body. Now cleaning the blade is easy. Inspect the shaft and lubricate if needed. Any oil will work, light grease works best. Reinstall the blade, when properly installed the blade will snap into place.


The fan will not start:

1. Is the controller display on? If Yes, skip to #3.
2. Check the power connections. The power supply has a green led indicator, it should be on. If it is not check the power source. If not lit or flashing, it would indicate power supply failure or no power source power.
3. Check that the fan plugs are all plugged in on the back of the controller.
4. Check the fan blades to make sure they are fully seated in the housing. Press on the center of the blade and push in. If it is not seated you can hear it snap into place.
5. Turn the fan blade by hand to see if they are stuck. They should be free moving. If this starts the fan it is likely the fans need maintenance.

The fan is making noise:

1. Check for anything that could be rubbing against the fan blade.
2. Make sure the fan blades are clean. Dirty fan blades can cause a rattling noise.
3. Check the blade prop shaft for lubrication. (See Blade Removal above)

If the above steps do not solve the problem, contact our friendly customer service for assistance.

Customer Reviews

2 / 2 Reviews


Reviewed By: Ivan on Jan 3rd 2017

I purchased this to cool a 16 space rack. Works great! The temperature display is nice so I can see the temperature in the rack. The fans are very quiet and keep everything cool. Highly recommended! Nice product.

Reviewed By: John on Nov. 24th 2016

I received the fan unit very fast! Packaging was good with lots of bubble wrap. Hooked up the fan and I was amazed at how quiet it runs. After a few minutes I noticed the tempeerature in my rack dropping. Dropped over 10 gegrees and kept it running cool. Very happy with this fan and I will be buying more for my other racks. 5 stars!

  • PROCOOL SP640X Review

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Frequently purchased with this item

C14 adaptor cable

Converts NEMA 5-15R to IEC320 C14
Use to connect all Procool power supplies to C13 receptacle.
Length = 12 inches
Part No. PSA-C14

EU plug adaptor

Converts US or EU plug to fit Australian outlets
Part no. PSA-AU

AU plug adaptor

Converts US and UK plug to fit European outlets
Part no. PSA-EU