HEIDENHAIN 21840069 Encoder Signal Cable

Technical Specifications

Model：21840069 Brand：HEIDENHAIN Product Type: Prefabricated multi-core shielded encoder signal cable assembly

Module Feature

Function: HEIDENHAIN 21840069 factory-terminated shielded encoder cable. It transmits DC supply power and EnDat absolute or 1Vpp incremental position signals between HEIDENHAIN encoders and servo / interpolation control units. Full copper braid shielding suppresses electromagnetic interference, ensuring stable high-precision position transmission for spindle, rotary table and linear feed axes on heavy horizontal boring mills and multi-axis machining centers.

Cable type: Multi-core shielded PUR signal cable Matched Device: HEIDENHAIN ECN, ROQ, ERN rotary encoders and LIC, LIDA, LIP linear scanning heads with M23 interface Onboard components: Tinned copper conductors, PE insulation, full copper braid shielding, molded M23 connectors, strain relief protection

LED indicators: Not applicable (cable assembly without LED)

Hardware self-diagnosis

Continuity test, insulation resistance test, shield continuity inspection

Programming software

No programming software required

Electrical Parameters

Voltage rating: 300V

Mechanical & Structure

Mounting: Routed inside machine cabinet and machine frame Outer jacket: Oil-resistant, coolant-resistant, flame-retardant PUR jacket Bending radius: ≥10 × cable outer diameter

Environmental

Operating temperature: -20℃ ~ +80℃ Ambient humidity: 5~85% non-condensing Certification: CE Status: HEIDENHAIN pre-assembled encoder signal cable

System compatibility

Compatibility description: 21840069 belongs to HEIDENHAIN encoder accessory family. Compatible with HEIDENHAIN incremental 1Vpp and EnDat absolute encoders with M23 connectors. Suitable for Fives Giddings & Lewis PIC900 CNC heavy boring mill system.

Function

Function description: 21840069 is prefabricated shielded encoder cable manufactured by HEIDENHAIN. It connects linear scale scanning head or rotary encoder to interpolation unit or servo drive, delivering DC power and position feedback signals. Copper braid shielding protects weak measuring signals from electromagnetic noise generated by high-power servo motors. PUR outer jacket resists cutting fluid, oil mist and metal chips in machine workshop environment. It is encoder feedback wiring spare for heavy CNC boring mills.

Installation

Installation steps: Follow lockout/tagout safety procedure before installation. Cut off encoder DC power. Disconnect old cable connectors at encoder and electronics end. Route 21840069 separately from high-current servo power cables. Secure cable clamps and connectors. Check insulation resistance and shield grounding. Restore power, verify encoder communication and axis position stability.

Interface

Interface list: M23 flange connectors on both ends, DC power and signal terminals for HEIDENHAIN 21840069.

Diagnostic

Troubleshooting: No encoder communication: Check DC supply, internal wire breakage or connector pin damage. Intermittent position fault: Poor shield grounding, connector corrosion or cable insulation aging. Signal amplitude drop: Excessive bending damage to internal conductors or shield fracture.

Product Brief

Brief description: 21840069 HEIDENHAIN shielded prefabricated encoder signal cable assembly,for transmitting power and position feedback signals between HEIDENHAIN encoders and CNC electronics on heavy CNC boring mills,encoder wiring spare.