DC 11-55V PWM Fan Speed Controller | EC EBM 4-Wire Temp Control
DC 11-55V PWM Fan Speed Controller | EC EBM 4-Wire Temp Control
DC 11-55V Digital Display 4-Wire PWM Fan Temperature Control Speed Controller
Take precise command of your industrial or commercial fan systems with this wide-voltage, digital-display PWM fan speed controller. Designed for 4-wire PWM fans, it supports common EBM fans and high-voltage EC fans using a 10V PWM control signal — making it a versatile solution for HVAC, server cooling, industrial enclosures, and more. The intuitive 3-digit LED display lets you monitor temperature and fan speed at a glance, while fully programmable temperature thresholds automate fan behavior for hands-free efficiency.
Made in Mainland China.
Key Features
- Wide Voltage Range: Operates on DC 11–55V, making it compatible with a broad range of DC power supplies and industrial setups.
- Dual PWM Frequency Support: Selectable 20 KHz or 2.5 KHz PWM output frequency (±2%) to match your fan's requirements.
- 10V PWM Control Signal: Natively supports EBM 4-wire fans and high-voltage EC fan 4-wire control — no adapters needed.
- Automatic Temperature-Based Speed Control: Set acceleration temperature, full-speed temperature, and low-temperature shutdown thresholds for fully automated fan management.
- Low-Temperature Fan Shutdown: Shuts down fans via PWM signal or extended relay when temperatures drop below the set threshold — saving energy and reducing wear.
- Digital Display: 3-digit LED tube displays temperature (°C), fan speed (×10 RPM), and operating status in real time.
- Manual Speed Override: Adjustable manual speed setting from 5–100% for direct control when needed.
- Forward/Reverse PWM Output: Configurable PWM output direction (P1 / P-1) for flexible installation.
- Fan Fault Alarm: Alarm signal port outputs low level when a fan fault is detected during a run state.
- High-Quality Build: Premium components ensure reliable long-term operation in demanding environments.
Technical Specifications
| Parameter | Value |
|---|---|
| Power Supply Voltage | DC 11–55V |
| Working Current | <0.1A |
| Fan Current Capacity | <5A (board connector; use separate power cord for higher loads) |
| PWM Frequency | 20 KHz or 2.5 KHz (±2%) |
| PWM Signal Amplitude | 10.5V (no-load) |
| Temperature Measurement Range | -9.9°C to 99.9°C |
| Temperature Accuracy (0–50°C) | <1.2°C error |
| Temperature Accuracy (other ranges) | <2°C error |
| Supported Fan Types | EBM 4-wire, EC high-voltage 4-wire (10V PWM) |
Temperature Parameter Settings
- Acceleration Temperature (L**): Range 5–94°C. When temperature rises above this value, PWM output begins increasing proportionally.
- Full Speed Temperature (H**): Range 10–99°C. At or above this temperature, PWM output is fixed at 100% (full speed).
- Shutdown Temperature (C**): Range 0–92°C. When set above 0, the fan shuts down completely (PWM + relay) below this temperature; fan restarts automatically when temperature rises above the acceleration threshold.
Note: The difference between acceleration and full-speed temperatures must be at least 5°C. The difference between shutdown and acceleration temperatures must be at least 5°C. The controller will auto-adjust parameters if these minimums are not met.
Button Controls
- "+" / "−" Buttons: Navigate display values during operation; increase/decrease settings during parameter configuration (long-press for continuous adjustment).
- "OK" Button (Short Press in Run Mode): Enter manual speed regulation setting (5–100%). Press again to save and exit.
- "OK" Button (Long Press in Run Mode): Enter temperature parameter settings (L**, H**, C**). Use "+"/"-" to adjust; short press OK to cycle through items and save.
- "OK" Button (Hold at Power-On): Enter function settings — configure PWM frequency (F20 / F2.5) and output direction (P1 / P-1).
What's in the Box
- 1× Temperature Control Speed Controller Module
- 1× Temperature Probe
Learn More About Industrial Fan Control Standards
For guidance on energy-efficient fan and motor control in industrial applications, refer to the U.S. Department of Energy – Fan Energy Index Resources.
Frequently Asked Questions
Q: What types of fans are compatible with this PWM fan speed controller?
A: This controller is designed for 4-wire PWM fans, specifically supporting common EBM 4-wire fans and high-voltage EC fans that use a 10V PWM control signal. It is not suitable for standard 2-wire or 3-wire DC fans without PWM control input.
Q: Can this controller be used with power supplies outside the DC 11–55V range?
A: No. The controller requires a DC power supply within the 11–55V range for safe and correct operation. Using a voltage outside this range may damage the unit or cause incorrect behavior.
Q: How does the automatic low-temperature fan shutdown work?
A: When you set a shutdown temperature (C**) above 0°C, the controller will automatically cut off both the PWM signal and the extended relay output when ambient temperature falls below that threshold. The fan will restart automatically once the temperature climbs back above the configured acceleration temperature (L**), ensuring energy is not wasted running fans unnecessarily in cool conditions.
Q: What is the difference between the 20 KHz and 2.5 KHz PWM frequency settings?
A: The 20 KHz frequency is typically used for quieter fan operation as it falls above the audible hearing range for most people, reducing high-pitched noise. The 2.5 KHz setting is an alternative for fans that require or perform better with a lower-frequency control signal. Check your fan's datasheet to confirm the recommended PWM frequency.
Q: Can I control the fan speed manually instead of using automatic temperature control?
A: Yes. In run mode, a short press of the "OK" button lets you enter a manual speed regulation mode where you can set the fan speed from 5% to 100% output, independent of temperature readings. Press "OK" again to save and return to normal operation.