LQT248H HART Module
Product Overview
The LQL248H is a high-precision, high-stability HART transmitter module launched by Shanghai Luoqian, which inherits most of the HART protocol commands and some custom commands. It is suitable for transmitting reed switch array resistance signals. This product uses an independent 24-bit Σ-Δ analog sampling chip from ADI to ensure high measurement precision. It features robust surge protection and reverse polarity protection, preventing installation errors and operational mistakes in engineering applications. Enhanced software security design includes an independent watchdog, low-voltage monitoring reset, and multi-task scheduling optimization. All components are industrial-grade, ensuring a long service life and stable performance. To facilitate long-term stockpiling by major customers, configuration settings can be made using buttons and HART communication devices.
Key Features
- High-precision measurement, accuracy up to 0.2%
- Excellent temperature stability
- HART+4~20mA standard current output
- Wide operating voltage range
Technical Specifications
| Parameter | Specification | Parameter | Specification | |
|---|---|---|---|---|
| Operating Power Supply | 12~35VDC | Output | HART+4~20mA | |
| Measurement Accuracy | 0.2% | Output Current Limit | 20.8mA | |
| Excitation Current | 210uA | Sensor | Reed Switch | |
| Load | 250Ω or 500Ω | Transport and Storage Temperature | -40~120℃ | |
| Temperature Coefficient | ≤25ppm/℃ F.S | Housing Material | PA66 | |
| Operating Temperature | -30~80℃ | Mounting Screws | M3*2 |
