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Hollow Shaft Encoder RAA25H
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The Hollow Shaft Encoder from Roundss is a precision rotary encoder designed to mount directly onto motor shafts without requiring an additional coupling, making installation simple and compact. Its semi‑hollow design with a 4 mm shaft diameter and 25 mm outer diameter supports accurate absolute position measurement, translating mechanical rotation into reliable digital signals for speed, position, and motion feedback. Hollow shaft encoders are favored in modern automation, robotics, and industrial machinery due to their forgiving installation and vibration tolerance, which reduces misalignment risk and enhances system stability. With high‑resolution options (10–16 bit) and robust communication interfaces such as RS422, RS485, and SSI, this encoder delivers precise feedback for control systems, PLCs, and motion controllers. Designed for durability with an IP65 protection rating and wide operating temperature range from ‑40 to 65 °C, the Hollow Shaft Encoder maintains consistent performance in demanding environments. Its compact size also allows integration into space‑constrained applications while offering low maintenance and high reliability. By providing accurate position feedback and seamless system integration, it supports optimized control and efficient operation in a wide range of industrial applications.
Basic Information Model RAA25H4 Product Type Photoelectric Single - turn Encoder Mechanical Parameters Outer Diameter 25mm Shaft Diameter 4mm （Semi-Hollow Shaft） Maximum Speed 1000r/min Shaft Load Radial (≤20N) ; Axial (≤10N) Electrical Parameters Resolution 10-16bit (Single - turn) Supply Voltage DC5V Output Code Binary Code / Gray Code Environmental Parameters Operating Temperature -40~65℃ Protection Rating IP65 Asynchronous Serial Communication Protocol RS422 / RS485 / RS232 Communication Interface Timed Transmission; Timed + Clear; Pulse Handshake; Handshake + Clear; Bus Command; Bus + Clear; MODBUS Baud Rate 115200 / 57600 / 38400 / 19200 / 9600 / 4800 Update Rate (Hz) 2000 / 1000 / 500 / 400 / 200 / 100 / 50 / 20 Synchronous Serial Communication Protocol SSI / CANopen / BiSS - C Drawing Dimension Reference：
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