Product Overview: Heidenhain 526974-24 (EQN 1325)
The Heidenhain 526974-24 is a high-precision multiturn absolute rotary encoder from the EQN 1300 series. Specifically designated as an EQN 1325, this encoder is engineered for high-performance motion control, providing absolute position feedback through the sophisticated EnDat 2.1 interface. It is a critical component for CNC machines and robotic systems where precise, repeatable positioning is mandatory without the need for a reference run.
Technical Specifications and EnDat Interface
The EQN 1325 features a resolution of 8192 positions per revolution (13 bits) and can record up to 4096 revolutions (12 bits) for its multiturn capability. The EnDat 2.1 serial interface allows for the transmission of absolute position values while simultaneously providing an incremental 1Vpp signal for high-speed control loops. This hybrid approach ensures both absolute accuracy and smooth dynamic performance in servo motor applications.
Key Technical Characteristics
- Part Number: 526974-24.
- Series: EQN 1325.
- Encoder Type: Multiturn Absolute.
- Interface: EnDat 2.1 (with 1Vpp incremental signals).
- Line Count: 512.
- Power Supply: 3.6V to 14V DC.
- Shaft Type: Tapered shaft 1:10.
- Mechanical Speed: Max. 12,000 rpm.
Advanced Performance and Durability
Heidenhain encoders are renowned for their thermal stability and mechanical robustness. The 526974-24 is designed with a high-precision optical scanning system that is resistant to contamination and electromagnetic interference. Its integrated stator coupling compensates for axial movement and radial runout of the motor shaft, ensuring that the measurement accuracy remains consistent even under high mechanical stress.
| Characteristic | Detail |
| Absolute Resolution | 13 Bit (8192) |
| Multiturn Range | 12 Bit (4096) |
| System Accuracy | ±20″ |
| Electrical Connection | 12-pin PCB connector |
Technical Note
The EnDat 2.1 interface allows the encoder to store motor-specific data in an internal electronic memory. This facilitates «Plug and Play» commissioning for motor manufacturers and service technicians, as the drive controller can automatically read the encoder parameters upon startup.
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