1. Introduction
The Finglai T80 series is an intelligent single-light column digital display process controller designed for precise measurement and control in various industrial applications. This versatile device can handle multiple input types to monitor and control parameters such as temperature, pressure, and liquid level. It features a clear digital display, a bar graph indicator, and configurable alarm outputs, making it suitable for a wide range of process automation tasks.

2. Setup and Installation
2.1 Physical Installation
The T80 controller is designed for panel mounting. Ensure the mounting panel has an appropriate cutout for the controller's dimensions. Secure the controller using the provided mounting clips on the sides of the unit.


2.2 Wiring Instructions
Refer to the wiring diagram below for proper connection of power, inputs, and outputs. Ensure all connections are secure and comply with local electrical codes. The controller operates on an AC85-270V power supply.

| Terminal No. | Description |
|---|---|
| 1, 2 | Thermocouple (TC) / Millivolt (mV) Input (+) |
| 3, 4 | Voltage (V) Input (+/-) |
| 5, 6 | Current (mA) Input (+/-) |
| 7, 8 | Cu50 RTD Input |
| 9, 10 | PT100 RTD Input |
| 11, 12 | Analog Output (mA/V OUT) |
| 13, 14 | +24V Power Supply (for two-wire transmitters) |
| 15, 16 | Upper Limit Alarm Relay Output (NO/NC) |
| 17, 18 | Upper Limit Alarm Relay Output (NO/NC) |
| 19, 20 | Lower Limit Alarm Relay Output (NO/NC) |
| 21, 22 | Lower Limit Alarm Relay Output (NO/NC) |
| 23, 24 | Power Supply (AC85-270V) / Ground (GND) |
Note: Specific output configurations (e.g., 4-20mA or RS485) depend on the model purchased. The diagram illustrates common terminal functions. For RS485 communication, consult the specific model's documentation for A/B terminal assignments, which may share terminals with power or other functions depending on the variant.
3. Operating Instructions
3.1 Front Panel Overview
The front panel provides the main interface for monitoring and configuration.

- PV Display Window: Shows the current Process Value.
- Bar Graph: Visual representation of the process value, typically 0-100%.
- Alarm Lights (AHH, AH, AL, ALL): Indicate different alarm states (Upper-Upper, Upper, Lower, Lower-Lower).
- SET Key: Used to enter/exit parameter settings and save changes.
- Up Key (增加): Increases parameter values.
- Down Key (减少): Decreases parameter values.
- Shift Key (位移): Moves the cursor during parameter editing.
3.2 Parameter Settings
The T80 controller allows adjustment of input type, output type, alarm types, and other operational parameters.
First Level Parameters Setting
- Press and hold the SET key for 3 seconds to enter the first level parameter setting mode.
- Use the Up or Down keys to change the value of the currently selected parameter.
- Use the Shift key to move the cursor to different digits for editing.
- Press the SET key again to save the changes and exit the setting mode.
Second Level Parameters Setting
For advanced configurations, access the second level parameters:
- While in the first level parameter setting mode, navigate until the "P000" parameter appears.
- Press the Shift key.
- Input the password "0036" using the Up/Down and Shift keys.
- Press the SET key to enter the second level parameter setting mode.
- Adjust parameters as needed using the Up/Down and Shift keys.
- Press the SET key to save changes and exit.
3.3 Input Type Configuration
The controller supports various input types. Configure the input type according to your connected sensor.
| Input Type | Code / Range (Default) |
|---|---|
| K (Thermocouple) | 0-1300 (0-1300) |
| E (Thermocouple) | 0-1000 (0-1000) |
| J (Thermocouple) | 0-1200 (0-1200) |
| S (Thermocouple) | 0-1700 (0-1700) |
| B (Thermocouple) | 0-1800 (0-1800) |
| R (Thermocouple) | 0-1700 (0-1700) |
| T (Thermocouple) | -200-400 (-200-400) |
| PT100 (RTD) | -200-600 (-200-600) |
| Cu50 (RTD) | -50-150 (-50-150) |
| 0-10V | 0-1000 (0-1000) |
| 4-20mA | 0-1000 (0-1000) |
| 0-5V | 0-1000 (0-1000) |
| 0-20mA | 0-1000 (0-1000) |
| 0-75mV | 0-1000 (0-1000) |
| 0-150mV | 0-1000 (0-1000) |
| Frequency | 0-9999 (0-9999) |
| Pulse | 0-9999 (0-9999) |
3.4 Function Parameters
Key function parameters that can be configured:
| Parameter | Description | Default Value |
|---|---|---|
| AL | Upper Alarm Value | 999.9 |
| AH | Lower Alarm Value | 0.0 |
| ALL | Upper Upper Alarm Value | 999.9 |
| AHH | Lower Lower Alarm Value | 0.0 |
| OUT | Output Control Setting | 0 |
| PASS | Password for Second Level Settings | 0036 |
4. Maintenance
To ensure optimal performance and longevity of your T80 process controller, follow these maintenance guidelines:
- Cleaning: Regularly clean the front panel with a soft, dry cloth. Avoid using abrasive cleaners or solvents that could damage the display or buttons.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature (0-50°C) and humidity (35-85% RH, non-condensing) ranges.
- Connection Checks: Periodically inspect all wiring connections for tightness and signs of corrosion or damage. Loose connections can lead to erratic behavior or system failure.
- Ventilation: Ensure that the ventilation slots on the sides of the controller are not obstructed to prevent overheating.
5. Troubleshooting
This section provides guidance for common issues you might encounter with the T80 process controller.
- No Power/Display Off:
- Check the power supply connections (Terminals 23, 24) for secure contact.
- Verify that the AC85-270V power source is active and within the specified voltage range.
- Inspect the power cable for any damage.
- Incorrect Process Value (PV) Reading:
- Ensure the sensor input type is correctly configured in the controller's settings (refer to Section 3.3).
- Check the sensor wiring connections (Terminals 1-10 depending on sensor type) for proper polarity and secure contact.
- Verify the sensor itself is functioning correctly and calibrated.
- Confirm the input range settings match your application.
- Alarms Not Activating/Deactivating:
- Check the alarm setpoints (AL, AH, ALL, AHH parameters) to ensure they are configured correctly for your desired thresholds.
- Verify the alarm relay output wiring (Terminals 15-22) is correct and connected to the intended external devices.
- Test the external alarm devices (e.g., lights, buzzers) independently.
- Output Not Responding:
- Confirm the output type (e.g., 4-20mA) is correctly configured for your model and application.
- Check the analog output wiring (Terminals 11, 12) for secure connections and correct polarity to the receiving device.
- Verify the output control settings (OUT parameter) are appropriate for your control strategy.
- Controller Unresponsive to Button Presses:
- Ensure the controller is not in a locked mode (though no explicit lock function is mentioned, some industrial controllers have this).
- Try a power cycle (turn off and on) to reset the unit.
If issues persist after following these steps, please contact technical support.
6. Specifications
| Feature | Specification |
|---|---|
| Brand Name | Finglai |
| Model Numbers | T80-3NC420, T80-4NC420, T80-4RN |
| Type | Intelligent Digital Display Process Controller |
| Material | Plastic |
| Origin | Mainland China |
| Input Type | Multiple inputs (TC, RTD, Voltage, Current, Frequency, Pulse) |
| Default Input | 4-20mA |
| Output Type | 4-20mA, 4 Limit Alarms (Relay), RS485 (model dependent) |
| Control Range | Full scale (0-500.0 default for 4-20mA output model) |
| Accuracy | 0.5% of full scale |
| Sampling Cycle | 0.5 seconds |
| Operating Temperature | 0°C to 50°C |
| Operating Humidity | 35% to 85% RH (non-condensing) |
| Power Consumption | <5W |
| Power Supply | AC85-270V |
7. User Tips
No specific user tips were available from reviews or Q&A for this product. Always refer to the detailed specifications and wiring diagrams for your specific application.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your vendor or the manufacturer, Yueqing Finglai Electric Co.,Ltd. Ensure you have your product model number (e.g., T80-4NC420) and purchase details ready when seeking support.
You may also find additional specifications and support information by scanning the QR code found on the product label (refer to Figure 5).