The **XHS35F-75-R2-SS-EPROGAB** is a high-performance, programmable incremental encoder manufactured by BEI Sensors (Sensata Technologies). It is designed for heavy-duty industrial applications. Below is a breakdown of its electronic and technical specifications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Model Series** | XHS35 (Extreme Heavy Duty) | | **Shaft Type** | Hollow Shaft (3/4" or similar depending on bore) | | **Resolution** | Programmable (up to 65,536 PPR) | | **Output Type** | EPROG (Electronic Programmable) | | **Supply Voltage** | 5 to 28 VDC | | **Frequency Response** | Up to 1 MHz | | **Connector Type** | Radial (R2) - Typically 10-pin MS Connector | --- ### 2. Electronic Components & Features #### A. Programmable Output (EPROG) Unlike fixed-resolution encoders, the **EPROG** designation indicates that the Pulses Per Revolution (PPR) can be configured by the user. * **Flexibility:** Allows the same hardware to be used for multiple applications by changing software settings. * **Index Pulse:** The Z-pulse (zero reference) position can also be electronically set. #### B. Output Signals & Drivers The unit typically utilizes a **Differential Line Driver** (often 7272 or similar). This provides: * **Complementary Signals:** A, /A, B, /B, Z, /Z. * **Noise Immunity:** Differential signaling cancels out common-mode electromagnetic interference (EMI), essential for long cable runs in industrial environments. * **Reverse Polarity Protection:** Protects the electronics if the power supply leads are swapped. #### C. Environmental Electronic Protection * **Seal Type:** "SS" indicates Stainless Steel construction or high-grade sealing, providing superior protection against corrosive elements. * **ESD/Short Circuit Protection:** The outputs are designed to withstand brief short circuits to ground or power. --- ### 3. Wiring Diagram (Typical 10-Pin MS Connector) For the **R2** (Radial 10-pin) configuration, the pinout usually follows this standard: | Pin | Function | Description | | :--- | :--- | :--- | | **A** | Channel A | Main pulse train | | **B** | Channel B | Quadrature pulse (90° shift) | | **C** | Channel Z | Index pulse (once per rev) | | **D** | Vcc | Supply Voltage (5-28V) | | **E** | — | No Connection | | **F** | GND | Common Ground | | **G** | Case | Shield/Chassis Ground | | **H** | Channel /A | Inverted A | | **I** | Channel /B | Inverted B | | **J** | Channel /Z | Inverted Z | --- ### 4. Application Context The "XHS" series is "Extreme Heavy Duty," meaning the electronics are isolated from the shaft via **Dual Bearings** and often include **Internal Isolation** to prevent shaft currents (common in large AC motors) from damaging the encoder's internal circuitry.