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What is the interface of a sin cos encoder
A SinCos (Sine-Cosine) encoder uses an analog interface to deliver high-resolution position data, differing significantly from digital encoders (e.g., HTL or TTL). Below is a detailed breakdown of its interface components and how they work.
A SinCos encoder generates two analog waveforms with a 90° phase shift:
Sin (Sine): Primary position signal.
Cos (Cosine): Quadrature-shifted reference.
These signals are typically delivered in two formats:
Sin+: 0.5V to 4.5V sine wave (1V peak-to-peak).
Cos+: 0.5V to 4.5V cosine wave.
Reference Ground (GND): Common return path.
Sin+ / Sin–: Complementary sine signals.
Cos+ / Cos–: Complementary cosine signals.
Shield: Noise protection.
Why differential?
Rejects electromagnetic interference (EMI) in industrial environments.
Supports longer cable runs (up to 50m).
Most SinCos encoders include auxiliary outputs for system synchronization:
Reference Mark (Z/Z–): A single pulse per revolution (absolute position reset).
R+ / R–: Optional index signal for alignment.
Power Supply: Typically 5V DC (±10%) or 8–30V DC for rugged models.
SinCos encoders require interpolation electronics to convert analog signals into digital position data:
Servo Drives: Built-in SinCos interpolators (e.g., 16-bit to 24-bit resolution).
External Interpolation Modules: Used with PLCs or motion controllers.
RDC (Resolver-to-Digital Converters): For legacy systems.
Key Parameters to Configure:
Signal amplitude (1Vpp standard).
Interpolation factor (e.g., 4096x for 20-bit+ resolution).
Filtering (to reduce noise).
Our encoders support:
✔ 1Vpp single-ended or differential outputs.
✔ IP65 protection for harsh environments.
✔ Custom pinouts & connectors for OEM integration.
Need a SinCos encoder tailored to your system?
Contact SHHXGD for technical support!
