Heidenhain 521289-03 (ERN 1387) Incremental Rotary Encoder

Technical Specifications & Overview

The Heidenhain 521289-03 is an ERN 1387 series incremental rotary encoder equipped with integral bearings designed for stator coupling attachment on industrial motor drives. Delivering a 2048-line count resolution accompanied by absolute commutation signals (1 Vpp), this precise motor feedback encoder enables accurate speed regulation and high-dynamic vector control.

Key Technical Characteristics

• Manufacturer: Heidenhain

• Part Number / ID: 521289-03

• Series / Model: ERN 1387

• Line Count / Resolution: 2048 lines per revolution

• Signal Interface: 1 Vpp (~1.05 Vpp) sinusoidal analog signals with 1 sine/cosine commutation track

• Power Supply: 5 V DC (±5%)

• Shaft Design: 1:10 Taper shaft (9.25 mm functional diameter) for direct motor attachment

• Mounting Design: Integral bearing with mounted stator coupling

• Degree of Protection: IP 40 (EN 60529)

• Operating Temperature: -40 °C to +100 °C

Applications & Industrial Integration

Specifically designed for closed-loop motion control and initial rotor positioning in specialized drive units, the Heidenhain 521289-03 encoder is widely integrated across high-performance machinery, including:

• Elevator traction machines and hoist drives

• Synchronous and asynchronous industrial servo motors

• Direct-drive positioning systems

• Automated material handling equipment

Commercial Assistance & Sourcing

At AtlanTech Drives, we provide high-level commercial guidance for sourcing critical industrial automation hardware. Contact our sales specialists today to check stock availability, confirm delivery lead times, or receive an immediate competitive quote.