The **XHS35F-100-R2-SS-XPROGAB** is a high-performance, heavy-duty incremental hollow-shaft encoder manufactured by BEI Sensors (Sensata Technologies). It is designed specifically for demanding industrial environments such as motor feedback and oil/gas applications. --- ### 1. Part Number Breakdown To understand the electronic and mechanical capabilities, here is the breakdown of the nomenclature: | Segment | Code | Description | | :--- | :--- | :--- | | **Series** | **XHS35F** | Explosion-proof (ATEX/IECEx) heavy-duty 3.5" hollow shaft encoder. | | **Bore Size** | **100** | 1.00 inch diameter hollow shaft. | | **Mounting** | **R2** | Stator coupling (Tether mount) for motor frame mounting. | | **Seal** | **SS** | Shaft Seal (IP66/IP67 rated for washdown environments). | | **Output** | **XPROGAB** | Programmable output electronics. | --- ### 2. Key Electronic Specifications The "XPROGAB" suffix indicates a sophisticated electronic driver board that allows for versatility in power and signaling. * **Supply Voltage:** Wide range, typically **5 to 30 VDC**. * **Output Circuit:** Universal driver. It is compatible with: * **TTL:** RS-422 line driver (5V signal). * **HTL:** High Threshold Logic (Push-Pull, signal follows input voltage). * **Resolution (PPR):** This specific model is **programmable**. While the hardware can handle high counts, the electronic interface allows the user to define the pulses per revolution (up to 16,384 PPR depending on the specific sub-variant). * **Channels:** Standard A, B, and Z (Index) channels with their complements (A/, B/, Z/) for noise immunity. --- ### 3. Protection and Certifications The electronics are encapsulated to withstand hazardous and harsh conditions: * **Hazardous Area Ratings:** Certified for Class I, Div 1 & 2, and ATEX/IECEx Zone 1 & 2. * **Electrical Protection:** * Reverse polarity protection. * Short circuit protection on outputs. * High EMC/RFI immunity for use near large Variable Frequency Drives (VFDs). * **Connection:** Usually features a terminal box or a heavy-duty MS-style connector designed for shielded cabling. --- ### 4. Technical Summary Table | Feature | Specification | | :--- | :--- | | **Encoder Type** | Incremental | | **Housing Material** | Hard Anodized Aluminum (Standard) | | **Max Frequency** | Up to 300 kHz | | **Ingress Protection** | IP66 / IP67 | | **Operating Temp** | -40°C to +85°C (Standard) | | **Shaft Loading** | Radial: 80 lbs / Axial: 40 lbs | ---