The **HAS-H5-R** refers to a specific series of **Open-Loop Hall Effect Current Transducers** manufactured by LEM. These components are designed for measuring DC, AC, and pulse currents with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic control). --- ## 1. Technical Specifications Table | Feature | Specification Details | | :--- | :--- | | **Measurement Type** | Open Loop Hall Effect | | **Primary Nominal Current ($I_{pn}$)** | 50 A (varies by specific sub-model) | | **Output Signal** | Analog Voltage ($0 \pm 4V$) | | **Supply Voltage ($V_c$)** | $\pm 15V$ DC ($\pm 5\%$) | | **Accuracy** | $\pm 1\%$ of $I_{pn}$ at $+25^\circ C$ | | **Frequency Bandwidth** | DC to 50 kHz (-3dB) | | **Response Time** | $< 3 \mu s$ | | **Operating Temperature** | $-10^\circ C$ to $+80^\circ C$ | --- ## 2. Key Electronic Components & Working Principle The HAS-H5-R operates using three main electronic functional blocks: ### A. Magnetic Core The device features a circular or rectangular magnetic core that surrounds the primary conductor. This core concentrates the magnetic flux generated by the current flowing through the wire. ### B. Hall Effect Generator Located in the air gap of the magnetic core, this semiconductor sensor produces a tiny voltage (Hall voltage) proportional to the magnetic flux density. ### C. Conditioning Circuitry The internal PCB contains operational amplifiers and compensation components that: 1. **Amplify** the weak Hall voltage. 2. **Linearize** the output to ensure the voltage represents the current accurately. 3. **Offset Adjustment**: Ensures the output is exactly 0V when no primary current is flowing. --- ## 3. Terminal Connection Configuration The "R" in the suffix usually denotes a specific mounting or pin configuration (often right-angle or specific PCB footprint). The standard pinout is typically: 1. **Terminal +**: Positive Supply Voltage (+15V) 2. **Terminal -**: Negative Supply Voltage (-15V) 3. **Terminal M**: Measurement Output (Output Voltage) 4. **Terminal 0V**: Ground/Common Reference --- ## 4. Design Advantages * **Galvanic Isolation:** The control electronics are physically separated from the high-voltage primary line, protecting the MCU/PLC. * **Low Power Consumption:** Efficient sensing with minimal heat dissipation. * **Small Footprint:** Optimized for PCB mounting in industrial power supplies and small motor drives. ---