12V 24V 48V 8A PWM DC Fan Temperature Control Speed Regulation Controller Temp Display Monitor Digital Thermostat FAN Governor

12V24V48V chassis cabinet fan temperature control speed regulation 485 serial port PWM temperature control EC fan EBM

1. Function overview:

Industrial-grade technical solution, using ARM core single-chip microcomputer as the main control chip, with temperature display, the governor passes the detected temperature.

The higher the temperature, the faster the speed. When the temperature is lower than the starting temperature, the fan will stop or maintain the minimum rotation speed.

When the speed is higher than the starting degree, the fan runs at a low speed. If the temperature continues to rise, the fan speed also increases slowly. When the temperature rises to When the temperature is set at full speed, the fan will run at full speed. When the temperature begins to drop, the fan speed will also automatically drop, and this cycle work; the governor supports RS485 serial communication, through the serial protocol, the fan speed can be controlled, and the parameters of the governor can be configured/queried.

Number/status, serial port commands follow modbus-rtu protocol, fan speed is adjustable from 0-100%, with fan fault detection function,

When the fan stops abnormally, the relay outputs a signal.

2. Product performance/technical parameters

1. Industrial-grade solution, using ARM series microcontroller as the main control chip, with stable performance

2. Wide voltage design, support 12V/24V/48V four-wire PWM fan/motor direct access, maximum drive current 8A

3. With LED indication, visual indication of the working state of the governor

4. The power supply anti-reverse connection protection design, the power supply reverse connection will not burn the board

5. Start and full speed temperature can be set freely, support two working modes of minimum speed and shutdown fan

6. Support fan fault detection, with relay signal output

7. Standard modbusRtu protocol, support RS485 serial port to set various parameters, query fan status, control fan speed

8. RS485 serial port TVS anti-surge design, serial port parameters default to 9600bps, 8, N, 1

9. 100% shutdown of all 4-wire fans

10. PWM output frequency 25Khz, amplitude 5V/10V configurable

11. Temperature measurement range: -10~99°C,

12. Temperature measurement accuracy: ±1°C

13. Operating temperature range: -30~80°

SIZE: 115X90X40MM Installation size: 105MMX70MM

5. Basic function instructions

5.1 Connect the wiring according to the interface instructions

5.2 After the power supply is normal, the POW light on the main board will light up, at this time the governor starts to detect the current temperature, and according to the current setting

The speed of the fan can be adjusted according to the temperature range of the speed controller. Take the factory default temperature range of the governor as an example.

The interval is L=30°C, H=50°C, when the current temperature is detected to be greater than or equal to 30°C, the governor adjusts the fan in a linear proportion If the temperature increases, the fan speed will also speed up. When the temperature is ≥50°C, the fan becomes full speed. When the temperature drops to ≤ At 27°C (L-3), the governor puts the fan at minimum speed and/or shuts down the fan.

6. About the use of fan fault signal indicating relay

A low-power relay (dry contact) is integrated in the governor, which is mainly used to indicate the abnormal stop of the fan, which can be used as an indication

The signal is connected to the digital input port of the PLC/IPC, and can also be used as a switch to control low-power equipment directly

Relay parameters: AC250V/DC30V, maximum load current 3A

When the fan is normal, the relay has no action (COM and NO are disconnected, and NC is closed). When it is detected that the fan stops abnormally, the relay will

The appliance will act (COM and NC open, and NO closed).