SICK DFS60E-S4EA01024 (DFS60 Series) – Incremental Encoder
Overview

The DFS60E-S4EA01024 encoder from SICK is part of the DFS60 family of high-resolution rotary incremental encoders. It combines a robust mechanical design with field-programmable signal options and high performance suited for industrial automation tasks.
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Key Features & Capabilities

Pulse Output & Resolution
Produces 1,024 pulses per revolution (PPR) in its default configuration.
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Measures in discrete steps of 90° (i.e., quadrature signals) with a measuring step deviation of ±0.15° and total error limits of ±0.3°
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Interfaces & Signals
Supports HTL / push-pull electrical output interface over 10–32 V DC supply.
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Capable of up to 300 kHz output frequency.
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Includes a single reference (index, “Z”) signal, 90° gated with A and B channels.
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Features short-circuit protection (against other channels, supply, or ground) for up to 30 s, and also reverse polarity protection.
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Mechanical & Mounting Details

Solid shaft, 10 mm diameter, with a 19 mm shaft length (flat)
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Face-mount flange design
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Start-up torque: ~0.5 N·cm at +20 °C
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Operating torque: ~0.3 N·cm at +20 °C
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Permissible shaft loads: 80 N radial, 40 N axial
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Maximum rated speed: ~9,000 rpm
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Moment of inertia (rotor): ~6.2 g·cm²
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Bearing life: ~3.6 × 10¹⁰ revolutions
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Max angular acceleration: ≤ 500,000 rad/s²
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Environmental & Durability

Operating temperature range: 0 °C to +85 °C
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Storage temperature: –40 °C to +100 °C
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Enclosure protection: IP67 on housing side (with connector), IP65 on shaft side
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Vibration resistance: 20 g, 10–2,000 Hz
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Shock resistance: 50 g, 6 ms per EN 60068-2-27
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Relative humidity tolerance: up to 90 % (non-condensing); condensation on optical elements not permitted
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EMC certification: conforms to EN 61000-6-2 and EN 61000-6-4 standards
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Initialization & Performance

Initialization (power-on) time: ~40 ms
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Power consumption (without load): ≤ 0.5 W
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Load current: ≤ 30 mA
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Safety & Reliability

MTTFd (mean time to dangerous failure): ~300 years (per EN ISO 13849-1), for standard usage assumptions
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Not classified as a “safety component” under the Machinery Directive (i.e. not inherently failsafe)
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Applications & Use Cases

Motion control systems requiring precise incremental feedback

Servo drives, stepper systems, and closed-loop automation

Position sensing in robotics, machine axes, conveyors

Systems where high reliability, high speed, and environmental robustness are needed