The **GLP2-375-R-54** is a high-precision industrial linear potentiometer manufactured by **Gefran**. It is designed to convert mechanical displacement (position) into a proportional electrical voltage signal using a resistive track. --- ### 1. Core Technical Specifications The electronic behavior of this part is defined by its resistance and its ability to maintain linearity over its stroke length. | Feature | Specification | | :--- | :--- | | **Model Series** | GLP (Gefran Linear Potentiometer) | | **Nominal Stroke** | 375 mm | | **Electrical Resistance** | 5 kΩ (standard for this length) | | **Resistance Tolerance** | ± 20% | | **Independent Linearity** | ± 0.05% | | **Resolution** | Infinite (Analog) | | **Recommended Current** | < 0.1 µA | | **Max Supply Voltage** | 60V DC | --- ### 2. Electronic Operating Principle The GLP2-375 functions as a **Voltage Divider**. * **The Track:** It features a conductive plastic resistive element. Unlike wire-wound potentiometers, conductive plastic offers "infinite resolution," meaning it can detect even the smallest sub-micron movements without stepping. * **The Wiper:** A multi-finger metal brush slides along the track. As the rod moves, the resistance between the wiper and the end terminals changes linearly. * **Output Signal:** The device outputs a ratio of the input voltage ($V_{out} = V_{in} \times \frac{Position}{Total Stroke}$). ### 3. Wiring and Connections The "54" in the part number typically refers to the protection rating or specific connector type (often an **M12 4-pin connector** or a **DIN 43650** 4-pin plug). #### Standard Pinout Map: 1. **Pin 1:** Supply Voltage (-) / Common 2. **Pin 2:** Output Signal (Wiper) 3. **Pin 3:** Supply Voltage (+) 4. **Pin 4:** Case Ground (Shield) > **Important:** To ensure the longevity of the electronic track, the device should be used as a voltage divider, not a variable resistor. High current through the wiper (above 1mA) can damage the conductive plastic. --- ### 4. Key Electronic Advantages * **High Linearity:** The $\pm 0.05\%$ linearity ensures that the electrical output is an extremely accurate representation of the physical distance. * **EMC Immunity:** As a passive resistive device, it is inherently resistant to electromagnetic interference compared to digital encoders. * **Temperature Stability:** The resistive element is designed to have a very low temperature coefficient, preventing "drift" in readings as the machinery heats up.