0 548 004 S21-2048.004 Hengstler 53mm 10mm Taper Shaft Encoder 2048 Sin/Cos 5VDC Radial Cable

S21 series is Hengstler’s premium optical sine/cosine incremental encoder, specially designed for high-speed CNC spindles, high-precision servo motors and dynamic motion control equipment.Model 0 548 004 S21-2048.004 outputs analog sine and cosine wave signals (Sin/Cos) instead of square-wave ABZ pulses. Servo drive/CNC system subdivides each sine period into thousands of fine interpolation counts to achieve ultra-fine positioning resolution and ultra-smooth low-speed spindle running, effectively eliminating workpiece surface tool marks.Adopts 10mm standard 1:10 tapered solid shaft for precise friction coupling with spindle mandrel; radial outgoing shielded cable, built-in multi-stage signal monitoring function to detect undervoltage, optical disc damage and LED aging, ensuring long-term stable operation in metal cutting workshops. Widely used for imported CNC lathes, machining centers and high-end servo spindle replacement spare parts.

Core Electrical Parameters

• Resolution: 2048 sine/cosine signal periods per revolution

• Signal Format: Analog differential Sin / Cos + single-turn reference track Z

• Supply Voltage: DC 5 V ±5% (typical current 0.15A)

• Signal Amplitude: 1Vpp differential sine/cosine analog signal

• Max Response Bandwidth: 500kHz

• Operating Temperature: -15 ℃ ~ +120 ℃ wide temperature range

• EMC Performance: EN61000-4-4 Class 4 high anti-interference against inverter noise

• Built-in diagnosis: Undervoltage, contamination, grating disc breakage, LED service life monitoring

Mechanical Structural Features

• Housing Outer Diameter: Φ53mm die-cast aluminum round housing

• Shaft Spec: 10mm tapered solid shaft (1:10 taper), standard spindle coupling interface

• Mounting Mode: Floating spring anti-rotation tab, automatically compensates spindle radial runout ±0.1mm

• Cable Outlet: Radial side shielded multi-core cable, M12 connector optional

• Protection Class: IP40 (housing IP40, shaft side IP40; avoid direct coolant spray)

• Max Continuous Speed: 12000 rpm; short-term peak speed 15000 rpm

• Allowable Shaft Load: Radial 90N, Axial 20N

• Rotational Torque: ≤1 Ncm, ultra-low rotational inertia

• Vibration Resistance: 100m/s², 10–200Hz three-axis endurance

• Shock Resistance: 980m/s² instantaneous impact protection

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