RAA25H
Hollow Shaft Encoder
The Hollow Shaft Encoder 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.
Specification parameters
| 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 |
