Heidenhain 385487-03 (ERN 1387.020) Incremental Rotary Encoder

Technical Specifications & Overview

The Heidenhain 385487-03 (ERN 1387.020-2048) is an incremental rotary encoder with integral bearings designed specifically for motor feedback applications, including elevator drive systems and industrial servo motors. Delivering 2048 sinusoidal lines per revolution alongside absolute commutation signals, this high-precision optical encoder ensures smooth torque regulation, low ripple, and accurate vector control.

Key Technical Characteristics

• Manufacturer: Heidenhain

• Part Number / ID: 385487-03

• Series / Model: ERN 1387.020

• Line Count / Resolution: 2048 lines per revolution

• Signal Interface: 1 Vpp incremental sinusoidal signals with Z1 track for commutation

• Power Supply: 5 V DC (±5%)

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

• 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

Engineered for exact speed feedback and initial rotor position sensing in gearless and geared drive systems, the Heidenhain 385487-03 encoder is widely deployed across critical motion setups:

• 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 essential automation hardware. Contact our sales specialists today to check stock availability, confirm lead times, or request an immediate competitive quote.