1. Product Overview
The LCLCTC LC108 is an intelligent PID temperature controller designed for precise temperature regulation in various industrial and scientific applications. It features a clear LCD display, supports multiple thermocouple (TC) and RTD inputs, and provides SSR output for control. Equipped with RS-485 Modbus-RTU communication, it allows for integration into larger control systems. This manual provides essential information for the safe and effective installation, operation, and maintenance of your LC108 temperature controller.
Figure 1: LCLCTC LC108 PID Temperature Controller, Solid State Relay (SSR), and K-Type Thermocouple Sensor.
2. Key Features
- Power Supply: Operates on 85~265VAC, 50~60Hz.
- Panel Size: Compact 48x48mm design for easy integration.
- Input Types: Supports various Thermocouple (K, J, E, T, S) and RTD (PT100, Cu100, Cu50) inputs, selectable via menu.
- Output: SSR (Solid State Relay) output for precise control.
- Alarms: Features up to 2 configurable alarms.
- Communication: Integrated RS-485 Modbus-RTU for data exchange and remote control.
- Accuracy: High precision with 0.2% F.S. (Full Scale) accuracy.
- Sampling Time: Fast 0.5 second sampling rate.
- Environment: Designed for operation in 0-50℃ with humidity less than 85% (non-condensing).
Figure 2: The LC108 controller supports RS485 communication, making it compatible with various upstream equipment for integrated control systems.
3. Package Contents
Verify that all items are present and undamaged upon opening the package:
- 1 x LCLCTC LC108 PID Temperature Controller
- 1 x SSR 40DA Solid State Relay
- 1 x K-Type Thermocouple Sensor
- 1 x Instruction Manual (this document)
4. Specifications
| Attribute | Value |
|---|---|
| Display Type | LCD |
| Operating Temperature | 0-50 Degrees Celsius |
| UPC | 735373853112 |
| Manufacturer | LCLCTC |
| Product Dimensions (Controller) | 1.89"L x 1.89"W x 1.89"H (48x48x48mm) |
| Item Weight (Controller) | 5.75 Ounces (163g) |
| ASIN | B0CCKQPQCS |
| Country of Origin | China |
| Voltage | 85-265 Volts AC |
| Color | Gray |
| Included Components | Controller, SSR, Sensor |
Figure 3: LC108 Controller Dimensions and Basic Pinout Diagram.
Figure 4: Dimensions and Specifications for the Solid State Relay (SSR) and K-Type Thermocouple Probe.
5. Setup and Installation
Safety First: Ensure all power is disconnected before attempting any wiring or installation. Improper wiring can lead to electric shock or damage to the device.
5.1 Mounting the Controller
The LC108 controller is designed for panel mounting. Cut a square opening of 45x45mm (1.77x1.77 inches) in your control panel. Insert the controller from the front and secure it using the provided mounting brackets from the rear.
5.2 Wiring Diagram
Refer to the wiring diagram below for connecting the power supply, sensor, SSR, and alarm outputs. Ensure correct polarity and secure connections for reliable operation.
Figure 5: Detailed PID Temperature Controller Wiring Diagram. Connect power to terminals 5 and 6 (85-265V AC). Connect the SSR to terminals 3 and 4. Connect the Type K Thermocouple to terminals 10 and 11. PT100 Thermal Resistance connects to terminals 10, 11, and 12. Alarm output connects to terminals 7 and 8.
- Power Input (AC 85-265V): Connect to terminals 5 (L) and 6 (N).
- SSR Output: Connect the control terminals of the Solid State Relay to terminals 3 (OP1+) and 4 (OP1-).
- Thermocouple/RTD Input:
- For K-Type Thermocouple: Connect to terminals 10 (TC+) and 11 (TC-).
- For PT100 RTD: Connect to terminals 10, 11, and 12 (refer to diagram for specific connections).
- Alarm Output: Connect alarm devices (e.g., buzzer, indicator light) to terminals 7 (AL1) and 8 (AL1).
- RS-485 Communication: Connect A+ to terminal 17 and B- to terminal 18 for Modbus communication.
6. Operating Instructions
6.1 Power On and Initial Display
Once wired correctly, apply power. The controller will perform a self-test and then display the Process Value (PV) and Set Value (SV) on the LCD. PV indicates the current measured temperature, and SV is the desired temperature setpoint.
6.2 Setting the Temperature Setpoint (SV)
- Press the SET button briefly. The SV display will start flashing.
- Use the ▲ (up) and ▼ (down) arrow buttons to adjust the SV to your desired temperature.
- Press SET again to confirm the new setpoint. The SV display will stop flashing.
6.3 Parameter Configuration
The LC108 has various parameters for advanced configuration (e.g., input type, control mode, alarm settings, PID parameters). To access these:
- Press and hold the SET button for approximately 3-5 seconds to enter the parameter setting menu.
- Use the SET button to cycle through different parameters.
- Use the ▲ and ▼ buttons to change the value of the selected parameter.
- Press and hold SET again to save changes and exit the parameter menu, or wait for the controller to automatically exit after a period of inactivity.
Note: Refer to the detailed parameter list in the full technical manual (if available) for specific parameter codes and their functions. Incorrect parameter settings can lead to improper operation.
7. Maintenance
The LC108 PID Temperature Controller is designed for long-term, reliable operation with minimal maintenance. However, periodic checks can ensure optimal performance:
- Cleaning: Gently wipe the display and panel with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Connections: Periodically check all wiring connections to ensure they are secure and free from corrosion. Loose connections can cause erratic readings or control issues.
- Environment: Ensure the operating environment remains within specified temperature and humidity ranges to prevent damage to internal components. Avoid excessive dust or moisture.
- Sensor Check: If temperature readings become inaccurate, inspect the thermocouple or RTD sensor for physical damage or degradation.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Controller does not power on. | No power supply; incorrect wiring. | Check power connections (terminals 5 & 6) and ensure voltage is within 85-265VAC. Verify power source is active. |
| Inaccurate temperature reading (PV). | Incorrect sensor type selected; faulty sensor; loose sensor connection. | Verify the input type setting matches your sensor (K, PT100, etc.). Check sensor wiring to terminals 10, 11, 12. Replace sensor if damaged. |
| Output (SSR) not activating. | Incorrect control mode; SV not set correctly; faulty SSR; incorrect SSR wiring. | Check control mode settings. Ensure SV is set appropriately. Verify SSR wiring to terminals 3 & 4. Test SSR functionality. Note: Some SSRs require an external power supply for their control circuit if the controller's output is insufficient. |
| RS-485 communication issues. | Incorrect wiring (A+/B-); wrong communication parameters (baud rate, parity); address conflict. | Verify A+ and B- connections to terminals 17 & 18. Check communication settings in the controller and master device. Ensure unique Modbus addresses. |
| Controller displays "HHHH" or "LLLL". | Sensor open circuit (HHHH) or short circuit (LLLL) / out of range. | Check sensor wiring for breaks or shorts. Ensure sensor is within its specified temperature range. Replace sensor if necessary. |
9. Warranty and Support
LCLCTC products are manufactured to high quality standards. For warranty information, technical support, or service inquiries, please contact your original point of purchase or the manufacturer directly through their official website. Please have your product model number (LC108) and purchase details ready when contacting support.
For further assistance, you may refer to the manufacturer's online resources or contact their customer service department.
