HEIDENHAIN ERN 1387.003-2048 Incremental Rotary Encoder

Technical Specifications

Model：ERN 1387.003-2048 Brand：HEIDENHAIN Product Type: Bearing-integrated incremental optical rotary encoder

Module Feature

Function: HEIDENHAIN ERN 1387.003-2048 incremental rotary encoder with built-in precision bearing. It generates 1Vpp sine/cosine incremental signals and reference mark signal for angular position and rotational speed measurement. 2048 lines per revolution. Compact flange housing design for direct installation on servo motors or spindles. Widely used on heavy horizontal boring mills, machining centers and high-performance servo drive systems.

Measuring principle: Incremental optical scanning Incremental lines: 2048 lines per revolution Output Signal: 1 Vpp sine/cosine incremental signals + reference mark Max traversing speed: 12000 rpm Onboard components: Optical grating disc, scanning assembly, precision bearing, metal housing, multi-pin connector

LED indicators: POWER, SIG, FAULT diagnostic lights

Hardware self-diagnosis

Signal amplitude monitoring, reference mark detection, signal integrity inspection

Programming software

HEIDENHAIN diagnostic software for signal quality verification and mounting adjustment

Electrical Parameters

Supply voltage: 5VDC ±10% Power consumption: Max 130mA

Mechanical & Structure

Mounting: Flange mounting for servo motor spindle Protection class: IP40 (housing)

Environmental

Operating temperature: -40℃ ~ +120℃ Ambient humidity: 5~85% non-condensing Certification: CE Status: HEIDENHAIN heavy-duty incremental rotary encoder

System compatibility

Compatibility description: ERN1387 belongs to HEIDENHAIN ERN1387 incremental encoder family, compatible with HEIDENHAIN EXE interpolation units. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill spindle and servo axis.

Function

Function description: ERN 1387.003-2048 is incremental rotary encoder manufactured by HEIDENHAIN. Integrated bearing reduces mechanical installation error. Reference mark signal is required for axis homing after power-up. Robust mechanical construction resists vibration and temperature fluctuation in machine workshop environment. It is high precision rotary measuring spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off encoder 5VDC power. Mount ERN1387 encoder onto motor shaft and fasten fixing screws. Connect shielded encoder cable to interpolation or servo control unit. Restore power, verify LED indicators, run signal test and axis homing calibration.

Interface

Interface list: Multi-pin connector, 5VDC power and 1Vpp incremental signal terminals,on-board POWER / SIG / FAULT LED indicators for HEIDENHAIN ERN 1387.003-2048.

Diagnostic

Troubleshooting: No encoder signal: Check 5V supply, cable breakage or connector pin damage. FAULT LED lit: Low signal amplitude, grating contamination or shaft misalignment. Intermittent position jump: Vibration, loose mounting or bearing wear.

Product Brief

Brief description: ERN 1387.003-2048 HEIDENHAIN bearing-integrated incremental rotary encoder with 2048 lines and 1Vpp output,provides angular position and speed feedback for heavy CNC boring mill spindle and servo motor closed-loop control,rotary encoder spare.