The **XHS35F-100-R2-FS-EPROGABZ** is a high-performance, programmable incremental optical encoder manufactured by **BEI Sensors (Sensata Technologies)**. It is designed for heavy-duty industrial applications, particularly for large motor feedback. --- ## 1. Electronic & Technical Specifications The part number follows a specific nomenclature that defines its electronic characteristics: | Feature | Specification | Description | | :--- | :--- | :--- | | **Model Type** | XHS35F | Extreme Heavy Duty, Hollow Shaft (35mm series) | | **Shaft Diameter** | 100 | 1.00-inch diameter bore | | **Mechanical Mounting** | R2 | Tether Arm mounting (provides flexibility and vibration dampening) | | **Protection Rating** | FS | Food Grade / Stainless Steel features (Enhanced wash-down protection) | | **Programmability** | EPROG | Electronic Programmable (Resolution can be set via software) | | **Output Type** | ABZ | Quadrature outputs (A, B) + Index (Z) | --- ## 2. Key Electronic Components ### A. Output Driver (Line Driver) This device typically utilizes a **Differential Line Driver (e.g., 5-28V DC)**. * **Channels:** A, B, and Z (Index pulse) along with their complements (A/, B/, Z/). * **Function:** Using differential signaling allows the encoder to transmit signals over long distances while remaining immune to electromagnetic interference (EMI). ### B. EPROG Feature (Electronic Programmability) Unlike fixed-resolution encoders, the **EPROG** variant contains an internal EEPROM. * **PPR (Pulses Per Revolution):** Users can program the resolution (e.g., from 1 to 65,536 PPR) using a specialized programming tool. * **Flexibility:** This reduces the need to stock multiple encoder models for different machines. ### C. Power Supply Requirements * **Voltage Range:** Typically **5 to 28 VDC**. * **Reverse Polarity Protection:** The internal circuitry is shielded against accidental wiring errors to prevent the destruction of the optical sensor. --- ## 3. Physical & Electrical Interface | Component | Description | | :--- | :--- | | **Optical Disc** | A high-precision glass or plastic disc that breaks the infrared light beam. | | **LED Source** | Gallium Arsenide (GaAs) infrared LED. | | **Termination** | Usually features a multi-pin M12 or M23 connector, or a shielded cable exit. | --- ## 4. Application Logic The electronic output is designed to interface with: * **PLCs (Programmable Logic Controllers):** High-speed counter inputs. * **VFDs (Variable Frequency Drives):** For closed-loop motor speed control. * **CNC Machinery:** For precise position tracking. ---