JPF4826 Intelligent DC Fan Temperature Control Speed Governor User Manual

1. Producte acabatview

The JPF4826 is an industrial-grade intelligent temperature control speed governor designed for DC fans. It utilizes an ARM core single-chip microcomputer as its main control chip, offering stable performance and precise temperature regulation. The device features a digital temperature display and dynamically adjusts fan speed based on detected temperature changes.

Les funcionalitats clau inclouen:

• Automatic fan speed adjustment: Higher temperatures result in faster fan speeds.
• Fan stop/minimum speed: When the temperature falls below a set starting threshold, the fan will either stop or operate at a minimum rotation speed.
• Gradual speed increase: As the temperature rises above the starting threshold, the fan speed increases proportionally.
• Full speed operation: The fan operates at full speed once the temperature reaches a predefined full-speed threshold.
• RS485 serial communication: Supports Modbus-RTU protocol for external control, parameter configuration, and status querying.
• Fan fault detection: Integrated relay provides a signal output in case of abnormal fan stops.

2. Especificacions

3. Configuració i cablejat

Careful wiring is essential for the correct and safe operation of the JPF4826 governor. Please follow the instructions and diagrams below.

3.1 Instruccions de la interfície

Terminal descriptions:

1. 1-2: Governor Power Supply Interface (V+ and V- for positive and negative poles)
2. 3-4: RS485 Serial Port A/D+ and B/D-
3. 5-8: Fan Power Supply and PWM Control Interface
   • 5: Connect to fan power supply -
   • 6: Connect to fan power supply +
   • 7: Connect to fan speed signal
   • 8: Connect to fan PWM control line
   • Nota: For convenience, the 4-position pins of the 16th interface can be directly connected for fan wiring without plugs.
4. 9-11: Fan Fault Signal Relay Output Port (COM, NO, NC)
5. 12: LED Indicator (POW is the power indicator, PWM is the fan control indicator)
6. 13: Temperature Probe Interface
7. 14-17: No.1-4 Fan Interface (Standard KF2510-4P socket, sequence: fan-, fan+, F0, PWM)

3.2 General Wiring Diagram

Important Safety Note: Do not plug or unplug the fan while the governor is powered on, as this may cause damage to the device.

4. Funcionament

4.1 Funcionalitat bàsica

Once the wiring is complete and power is supplied, the POW light on the main board will illuminate. The governor will immediately begin detecting the current temperature and adjusting the fan speed according to its configured temperature range.

Ús de la configuració predeterminada de fàbrica com a exempleampLI:

• Start Temperature (L): 30 °C
• Full Speed Temperature (H): 50 °C

When the detected temperature is greater than or equal to 30°C, the governor will linearly adjust the fan speed. As the temperature increases, the fan speed will also increase. When the temperature reaches or exceeds 50°C, the fan will operate at full speed.

Conversely, when the temperature begins to drop, the fan speed will automatically decrease. If the temperature falls to 27°C (which is L-3°C based on the default settings), the governor will set the fan to its minimum speed or shut it down completely, depending on the configured mode.

4.2 Temperature Control Demonstration

5. Funcions avançades

5.1 Comunicació sèrie RS485

The JPF4826 governor supports RS485 serial communication using the standard Modbus-RTU protocol. This allows for advanced control and monitoring:

• Control de velocitat del ventilador: Remotely adjust the fan speed from 0-100%.
• Configuració de paràmetres: Set various operational parameters of the governor.
• Status Query: Retrieve real-time fan status and temperature readings.

The serial port parameters are defaulted to 9600bps, 8 data bits, No parity, and 1 stop bit (9600, 8, N, 1). The RS485 serial port is equipped with TVS anti-surge design for enhanced protection.

5.2 Fan Fault Detection and Relay Output

A low-power relay (dry contact) is integrated into the governor to signal abnormal fan stops. This feature can be utilized in several ways:

• Indication Signal: Connect the relay output to a digital input port of a PLC (Programmable Logic Controller) or IPC (Industrial PC) to trigger alarms or system responses.
• Control directe: Use the relay as a switch to directly control other low-power equipment.

Relay Parameters: AC250V / DC30V, with a maximum load current of 3A.

Relay Behavior:

• Funcionament normal: The relay has no action. COM (Common) and NO (Normally Open) terminals are disconnected, while COM and NC (Normally Closed) terminals are closed.
• Abnormal Fan Stop: Upon detecting an abnormal fan stop, the relay will actuate. COM and NC terminals will open, and COM and NO terminals will close.

6. Solució De Problemes

If you encounter issues with your JPF4826 governor, please consider the following general troubleshooting steps:

• Sense alimentació/pantalla: Ensure the power supply is correctly connected and within the specified voltage range (12V/24V/48V). Check for proper polarity.
• El ventilador no gira: Verify that the fan is correctly wired to the governor and that the temperature probe is properly installed. Check if the detected temperature is below the set starting temperature, which might cause the fan to stop or run at minimum speed.
• Incorrect Speed Control: Confirm that the temperature probe is accurately measuring the ambient temperature. If using RS485, check communication settings and commands.
• Fan Fault Signal: If the relay triggers unexpectedly, inspect the fan for any obstructions or malfunctions. Ensure the fan is a compatible 4-wire PWM type.
• RS485 Communication Issues: Check wiring for RS485 A/D+ and B/D-. Verify baud rate, data bits, parity, and stop bits match the default (9600, 8, N, 1) or your configured settings.

For persistent issues, please refer to the detailed technical documentation or contact customer support.

7. Consells d'usuari

No specific user tips are available from reviews or Q&A at this time. However, general best practices for using temperature controllers include:

• Ensure adequate airflow around the temperature probe for accurate readings.
• Regularly clean fans to prevent dust buildup, which can affect performance and lead to overheating.
• When configuring custom temperature thresholds, test the system thoroughly to ensure it meets your specific cooling requirements.

8. Garantia i Suport

Per obtenir informació sobre la garantia, assistència tècnica o consultes sobre el servei, poseu-vos en contacte amb el vostre distribuïdor o directament amb el fabricant. Conserveu el rebut de compra com a comprovant de compra.