Product Overview: Heidenhain 376886-3R (EQN 1325)
The Heidenhain 376886-3R is a high-precision absolute multiturn rotary encoder from the EQN 1300 series. Specifically categorized as an EQN 1325, this encoder is designed for sophisticated motion control in CNC machinery and high-performance servo motors. It utilizes the EnDat 2.1 interface, allowing it to provide absolute position data while outputting 1Vpp incremental signals for high-dynamic control loops.
Technical Specifications and Communication
The EQN 1325 offers an absolute resolution of 13 bits (8192 positions per revolution) and a multiturn capability of 12 bits (4096 revolutions). This eliminates the need for reference runs after power interruptions. The hybrid signal output ensures that the drive controller receives both high-resolution absolute data for positioning and high-frequency sinusoidal signals for smooth speed regulation.
Key Technical Characteristics
- Part Number: 376886-3R.
- Model: EQN 1325.
- Interface: EnDat 2.1 (Absolute) with 1Vpp (Incremental).
- Resolution: 8192 positions (13 bit).
- Multiturn Range: 4096 revolutions (12 bit).
- Line Count: 512.
- Shaft: Tapered shaft 1:10 (9.25mm).
- Protection: IP40 (stator side) / IP64 (housing).
Mechanical Integrity and Servo Feedback
Built for industrial durability, the 376886-3R features an integrated stator coupling that compensates for mechanical misalignments and motor shaft play without sacrificing measurement accuracy. Its optical scanning technology is highly resistant to vibration and electromagnetic interference, making it an essential replacement part for high-end Siemens, Fanuc, and Bosch Rexroth motor assemblies.
| Characteristic | Detail |
| System Accuracy | ±20″ |
| Max Operating Speed | 12,000 rpm |
| Power Supply | 3.6V to 14V DC |
Frequently Asked Questions
Is this compatible with modern EnDat 2.2 drives? Yes, EnDat 2.2 controllers are backward compatible with EnDat 2.1 signals. Does it require a special cable? High-quality shielded 12-core cables are required to maintain signal integrity over long distances.
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