1. Introduction
The MYPIN LH86-RR4D is a high-precision digital weighing controller meter designed for various industrial automatic control applications. It offers stable and accurate measurement, fast response, and versatile control functions, making it suitable for quantitative/batching systems, floor scales, weighbridges, cement, food packaging, and chemical batching processes. This instrument can be directly connected to load cells or other force-measuring sensors and provides multiple output options for comprehensive system integration.
2. Safety Information
Please read and understand all safety instructions before installation and operation. Failure to follow these instructions may result in equipment damage, personal injury, or improper operation.
- Ensure the power supply voltage matches the device's specifications (90-260V AC/DC).
- All wiring should be performed by qualified personnel and with the power disconnected.
- Avoid installing the device in environments with excessive vibration, high humidity, extreme temperatures, or corrosive gases.
- Proper grounding is essential to prevent electrical shock and ensure stable operation.
- Do not open the device casing unless instructed by a qualified technician.
3. Package Contents
Verify that all items are present and undamaged upon unpacking:
- 1 x MYPIN LH86-RR4D Digital Weighing Controller Meter
- 2 x Mounting Brackets
- 1 x English Instruction Manual
4. Specifications
| Feature | Description |
|---|---|
| Model | LH86-RR4D |
| Input | 1-4 Load Cells (weighing/force measuring sensors) or other signals (0-70mV, 4-20mA, 0-10V) |
| Output | 4 Relay Outputs (High/Low/Fast/Slow), up to 6 channels of various control outputs |
| Analog Output | Isolated current transmission output 4-20mA or 0-10V (arbitrarily settable range) |
| Accuracy | 0.1% (five digits) or 0.05% (six digits), floating decimal setting |
| Power Supply | 90-260V AC/DC |
| Communication Interface | RS485, RS232 |
| External Sensor Power | +12/40mA or 150mA, or two-wire 24V/30mA |
| Dimensions | 96 x 48 x 80mm |
| Material | ABS+Metal |
5. Installation and Wiring
5.1 Mounting
The LH86-RR4D controller is designed for panel mounting. Use the provided brackets to secure the device into a standard panel cutout. Ensure adequate ventilation around the unit.
5.2 Wiring
All wiring connections are made via the terminal block located at the rear of the device. Refer to the wiring diagram below for correct connections. Ensure power is disconnected before making any connections.
- Power Supply (90-260V AC/DC): Connect the main power supply to the designated terminals.
- Load Cell Input (1-4 PCS LOADCELL): Connect the load cell excitation and signal wires to the EXC+, EXC-, SIG+, SIG- terminals. The device supports 1 to 4 load cells.
- RS485 Communication: Connect RS485 A and B lines to the corresponding terminals for serial communication.
- Alarm Outputs (AL1, AL2): These are relay outputs for high/low/fast/slow control. Connect external devices as required.
- RST/TARE: Terminal for external reset or tare functions.
- External Sensor Power: If using isolated sensors requiring external power, connect to the +12/40mA, 150mA, or two-wire 24V/30mA outputs as appropriate.
6. Operation
6.1 Display and Controls
The front panel features a dual LED display and control buttons:
- PV (Process Value) Display: Shows the current measured weight or force.
- SV (Set Value) Display: Shows the configured setpoint or target value.
- Unit Indicators: g, kg, T (grams, kilograms, tons) to indicate the measurement unit.
- AL1, AL2, AL3 Indicators: Show the status of the alarm/relay outputs.
- SET Button: Used to enter programming mode and confirm settings.
- /RST (Reset) Button: Used for resetting values or functions.
- Up/Down Buttons: Used to navigate menus and adjust parameter values.
6.2 Basic Functions
- Tare Weight Removal: Use the /RST button or a configured external terminal to zero out the current weight, effectively removing the container weight.
- Display Correction: The device supports calibration and correction functions to ensure accurate readings. Refer to the detailed manual for calibration procedures.
- 6-Way Switch Control: The controller offers versatile control options for start/stop, fast forward/reverse, and other functions relevant to filling or batching processes. These are typically configured through the device's settings.
7. Maintenance
To ensure the longevity and optimal performance of your MYPIN LH86-RR4D controller, follow these maintenance guidelines:
- Cleaning: Regularly wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no liquids enter the device.
- Inspection: Periodically check all wiring connections for tightness and signs of wear or corrosion.
- Environment: Maintain a clean, dry, and stable operating environment within the specified temperature and humidity ranges.
- Calibration: If accuracy drifts over time, recalibrate the device according to the procedures outlined in the full instruction manual.
8. Troubleshooting
If you encounter issues with your LH86-RR4D controller, consider the following common problems and solutions:
- No Display/Power: Check the power supply connection and ensure the voltage is within the 90-260V AC/DC range. Verify that the power switch (if external) is on.
- Inaccurate Readings: Ensure load cells are correctly wired and calibrated. Check for mechanical interference with the weighing platform. Verify that the load cell capacity matches the application.
- No Communication (RS485/RS232): Check the wiring for RS485 A/B or RS232 connections. Verify communication settings (baud rate, parity, data bits) on both the controller and the connected device.
- Relay Outputs Not Activating: Check the setpoints (SV) and ensure they are correctly configured relative to the process value (PV). Verify the wiring of external devices connected to the relay outputs.
- Unstable Readings: Check for electrical noise or interference. Ensure proper grounding. Verify load cell integrity and connections.
For more detailed troubleshooting steps and error codes, please consult the comprehensive English manual included with your product.
9. User Tips
- Modbus 485 Connectivity: The LH86-RR4D controller supports RS485 communication, which is commonly used for Modbus RTU protocols. This allows for integration with PLCs and other industrial control systems for data exchange and remote control.
- Environmental Protection: For optimal performance and longevity, especially in harsh industrial environments, consider housing the controller in a protective enclosure to shield it from dust, moisture, and extreme temperatures.
10. Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For warranty claims, technical support, or service inquiries, please contact your original point of purchase or the manufacturer's customer service. Keep your purchase receipt as proof of purchase.
