HEIDENHAIN ND221B Measured Value Display Unit

Technical Specifications

Model：ND221B Brand：HEIDENHAIN Product Type: Benchtop single-axis measured value display unit for linear and angular encoders

Module Feature

Function: HEIDENHAIN ND221B is a compact bench-top single-axis digital display unit, designed to work with HEIDENHAIN MT length gauges and sinusoidal linear encoders with 11μApp signal input. It features 9-digit numeric display with algebraic sign, supports millimeter / inch unit switching. Built-in reference mark processing function re-establishes datum after power cycle. It has MIN, MAX, DIFF, ACTL measurement functions and RS232-C serial port for measured value export to PC or printer. Stackable housing structure for multi-unit combination. Widely used on precision measuring stations, machine tool inspection and heavy horizontal boring mills.

Input signal: 11 μApp sinusoidal current signal Display: 9-digit numeric display with sign Unit selection: mm / inch Interface: RS232-C (V.24) serial port Onboard components: Metal benchtop housing, membrane keypad, power socket, encoder connector X1, data port X31

LED indicators: REF, IN, SET status indicators

Hardware self-diagnosis

Encoder signal detection, reference mark status check, power supply monitoring, parameter validation

Programming software

HEIDENHAIN configuration software for parameter setup and measured value reading

Electrical Parameters

Supply voltage: 100VAC ~ 240VAC Power consumption: Max 15VA

Mechanical & Structure

Mounting: Benchtop placement or bottom M4 screw fixed installation, stackable Protection class: IP40 (front panel)

Environmental

Operating temperature: 0℃ ~ +45℃ Ambient humidity: 5~85% non-condensing Certification: CE Status: HEIDENHAIN precision single-axis measured value display

System compatibility

Compatibility description: ND221B accepts HEIDENHAIN encoders with 11μApp sinusoidal signals, compatible with MT series length gauges and linear scales. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill measurement inspection.

Function

Function description: ND221B is bench-top measured value display manufactured by HEIDENHAIN. It captures sinusoidal measuring signals from linear gauges and encoders and converts to readable position value. Reference mark function recovers datum after power restart without full axis traverse. MIN/MAX/DIFF functions support simple dimensional inspection. RS232 port enables automatic data collection for quality record. Stackable design saves workspace for multi-channel measurement. It is precision measuring display spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Disconnect power supply. Place unit on flat bench or fasten by M4 screws. Connect encoder to X1 port, connect mains power cord. Configure measurement parameters via keypad. Power on, cross reference mark to set datum, test measurement functions and serial output.

Interface

Interface list: X1 encoder input port, X31 RS232-C data port, AC power inlet,on-board REF, IN, SET status indicators for HEIDENHAIN ND221B.

Diagnostic

Troubleshooting: No position reading: Check encoder wiring, signal type matching and power supply. REF indicator blinking: Waiting for reference mark traverse. Data export failure: Verify RS232 wiring, baud rate and parameter setting. Incorrect unit: Toggle mm/inch key or modify configuration parameters.

Product Brief

Brief description: ND221B HEIDENHAIN benchtop single-axis measured value display unit with 11μApp encoder input and RS232 output,used for precision position measurement of linear gauges and encoders for heavy CNC boring mill inspection,DRO spare.