1. Product Overview
The Halisense HLS-KWL series offers a range of PT100 and Thermocouple sensor temperature acquisition modules with RS485 Modbus output. These modules are designed for industrial applications requiring precise temperature measurement and reliable data communication. Available in 2, 4, 8, and 16 channel configurations, they support various thermocouple types (K/S/R/B/N/E/J/T) and PT100 sensors.
2. Setup and Wiring
Proper wiring is crucial for the accurate and reliable operation of the temperature acquisition module. Ensure all connections are secure and follow the diagrams below.
2.1 Power Supply
The module requires a DC 6-36V power supply. Connect the positive (+) and negative (-) terminals to the corresponding power input on the module.
2.2 Communication
The module uses an isolated RS485 communication port. Connect the A and B terminals to your RS485 master device.
2.3 Sensor Connections
2.3.1 PT100 Module Wiring
PT100 modules support both 2-wire and 3-wire PT100 sensors. Refer to the diagram for correct connection.
2.3.2 Thermocouple Module Wiring
Thermocouple modules require connecting the sensor signal input (IN) and common (COM) terminals. Ensure correct polarity for accurate readings.
3. Operating Instructions
The modules communicate using the Modbus RTU protocol over RS485.
3.1 Communication Parameters
- Baud Rate: Configurable from 1200 to 115200 bps (default 9600 bps).
- Data Update Rate: 10HZ/channel for PT100 modules, 2HZ/channel for Thermocouple modules.
- Mailing Address (Thermocouple): 1-247.
3.2 Communication Power Indication
The module features an indicator light for communication status:
- Solid Light: System is running normally.
- Flashing Light: Indicates active communication.
4. Maintenance
The module is designed for industrial environments with robust protection features. Regular checks of wiring and connections are recommended.
- Protection Features: Includes self-restoring fuse, anti-reverse diode, and TVS diode for overvoltage, overcurrent, and anti-reverse connection protection.
- Temperature Correction (Thermocouple): Software setting offset (-20.0~20.0°C) can be applied for fine-tuning temperature readings.
5. Troubleshooting
- No Reading / Error Alarm: Check for sensor disconnects. Ensure sensors are properly connected and within their operational range.
- Communication Failure: Verify RS485 wiring (A/B terminals), baud rate settings, and power supply. The communication power indicator should flash during active communication.
- Incorrect Readings: Check sensor type selection (PT100 vs. Thermocouple), wiring polarity, and apply software temperature correction if necessary for thermocouple modules.
- Module Not Powering On: Ensure DC 6-36V power supply is correctly connected and functional. The module has reverse polarity surge protection.
6. Specifications
The modules feature industrial-grade quality with isolated communication and a high-speed 32-bit microprocessor from STMicroelectronics.
6.1 PT100 Module Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Supply power | 6-36V DC | Communication port | Isolated RS485 |
| Number of channels | 1-16 channel | Temperature range | -200~850°C |
| Power consumption | <200mW | Sensor type | 2 or 3 wires |
| Temperature accuracy | ±0.3°C | Resolution | 0.1°C |
| Acquisition rate | 100KHZ/channel | Data Update | 10HZ/channel |
| Error alarm | Sensor disconnects detection | ||
| Baud rate | 1200~115200 (default 9600) | ||
6.2 Thermocouple Module Parameters
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Supply power | 6-36V DC | Communication port | Isolated RS485 |
| Number of channels | 1-16 channel | Operating temperature | -20~75°C |
| Power consumption | <200mW | Mailing address | 1-247 |
| Temperature accuracy | ±1°C | Resolution | 0.1°C |
| Acquisition rate | 100KHZ/channel | Data Update | 2HZ/channel |
| Error alarm | Sensor disconnects detection | ||
| Temperature correction | Software setting offset (-20.0~20.0°C) | ||
| Sensor type | K/S/R/B/N/E/J/T type thermocouple | ||
| Baud rate | 1200~115200 (default 9600) | ||
6.3 Thermocouple Temperature Range Table
| Sensor Type | Temperature Measurement Range |
|---|---|
| K type | -270~1370°C |
| S type | -50~1700°C |
| R type | -50~1700°C |
| B type | 250~1800°C |
| N type | -200~1300°C |
| E type | -270~1000°C |
| J type | -200~1200°C |
| T type | -270~400°C |
6.4 Physical Dimensions
Dimensions vary by channel count and module type. Below are examples:
7. User Tips
- Configuration Software: For advanced settings and configuration, ensure you have the necessary software. If not readily available, contact Halisense support for assistance.
- Wiring Verification: Always double-check all wiring connections before applying power to prevent damage and ensure accurate readings.
- Environmental Considerations: While designed for industrial use, avoid exposing the module to extreme conditions beyond its specified operating temperature range (-20~75°C for Thermocouple modules).
8. Warranty and Support
For detailed technical support, warranty information, or specific inquiries regarding your Halisense Temperature Acquisition Module, please refer to the official product documentation or contact Halisense customer service.
A comprehensive user manual in PDF format is available for download: View User Manual (PDF)