The **XHS35F-50-R2-SS-EPROGAB** is a high-performance, programmable optical incremental encoder manufactured by BEI Sensors (Sensata Technologies). It is part of the XHS35 series, specifically designed for heavy-duty industrial applications such as motor feedback and material handling. --- ### 1. Part Number Breakdown To understand the electronic capabilities, we can decode the nomenclature: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | XHS35 | Explosion-proof (ATEX/IECEx) heavy-duty 3.5-inch hollow shaft encoder. | | **Shaft size** | F-50 | 0.50-inch (1/2") diameter hollow shaft. | | **Mechanical** | R2 | Dual-sealed bearing with a tether arm for mounting. | | **Termination** | SS | Side-exit connector or cable (usually M12 or MS style). | | **Electronics** | **EPROGAB** | **Electronic Programmable** version with ABZ channels. | --- ### 2. Key Electronic Specifications The "EPROGAB" designation indicates that this unit is field-programmable, which is a critical feature for reducing inventory across different machine types. * **Output Channels:** A, B, and Z (Index pulse). The B channel is typically 90° out of phase with A to determine direction. * **Programmable Resolution:** The Pulse Per Revolution (PPR) can be programmed from **1 to 65,536 PPR** using a dedicated programming tool. * **Supply Voltage:** Wide input range, typically **5V to 30V DC**. * **Output Driver:** Universal Line Driver (TTL/HTL compatible). It can output a 5V signal (RS422) or a high-voltage signal matching the input supply. * **Protection:** Includes reverse polarity protection and output short-circuit protection. --- ### 3. Physical and Environmental Features Because this model is an "X" series, it is built for extreme environments: * **Hazardous Area Rating:** Designed for Class I, Div 1 & 2 or ATEX Zone 1/21 environments (Explosion Proof). * **Sealing:** Rated **IP67**, meaning it is dust-tight and can withstand temporary immersion in water. * **Housing:** Hard-anodized aluminum or stainless steel housing to resist corrosion and mechanical shock. --- ### 4. Technical Summary Table | Feature | Specification | | :--- | :--- | | **Encoder Type** | Incremental Optical | | **Max Frequency Response** | Up to 820 kHz | | **Logic Levels** | Vout = Vin (Universal) | | **Current Consumption** | 100 mA (max) | | **Operating Temp** | -40°C to +100°C (standard range) | | **Shock/Vibration** | 100g / 20g | ---