Product Analysis: Heidenhain 823901-52 (ECN 1313)
The Heidenhain 823901-52 is a state-of-the-art absolute singleturn rotary encoder, part of the ECN 1300 series. The ECN 1313 is specifically engineered for high-end servo motor feedback, offering a purely serial EnDat 2.2 interface. This allows for extremely high resolution and sophisticated diagnostic capabilities in a compact package, making it the preferred choice for robotics, aerospace test stands, and high-precision automation.
Resolution and Digital Connectivity
With an absolute resolution of 20 bits (1,048,576 positions per revolution), the 823901-52 provides incredibly fine granularity for motion control. The EnDat 2.2 interface not only transmits position data at high speeds but also supports an electronic ID label, allowing the drive to automatically configure itself based on the motor’s specific parameters. This reduces commissioning time and prevents errors during module replacement in the field.
Technical Characteristics
- Part Number: 823901-52.
- Model: ECN 1313.
- Encoder Type: Absolute Singleturn.
- Interface: EnDat 2.2 (Serial only).
- Resolution: 20 Bit (1,048,576 positions).
- Shaft: Tapered shaft 1:10 (9.25mm).
- Power Supply: 3.6V to 14V DC.
- Connection: 12-pin PCB connector.
Precision and Reliability
The 823901-52 is built with Heidenhain’s renowned optical scanning system, featuring a highly accurate circular scale. The integrated stator coupling provides a mechanical filter against motor vibrations while ensuring the measurement remains faithful to the rotor’s movement. Its compact 1300-series footprint allows it to be integrated into even the smallest high-performance motors without compromising the system’s thermal or mechanical limits.
| Category | Specification |
| System Accuracy | ±20″ |
| Max Mechanical Speed | 15,000 rpm |
| Shock Resistance | 1000 m/s² (6 ms) |
Technical Note
The EnDat 2.2 interface in the 823901-52 allows for cable lengths up to 100 meters without signal degradation, provided that high-quality shielded cables are used. This makes it an excellent choice for distributed control architectures where the drive is located far from the motor.
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