What is a Domestic SSI Encoder? Application Scenarios and Selection Criteria Explained

In high-precision position measurement and industrial automation systems, SSI (Synchronous Serial Interface) is widely adopted due to itsHigh real-time capability, strong interference resistance, and reliable data transmissionSSI encoders are widely used in the absolute value encoder field. As domestic industrial control systems continue to mature, “domestic SSI encoders” are gradually becoming a key consideration for equipment manufacturers and system integrators during selection.

1. What is an SSI encoder?

SSI encoders refer to those that utilize SSI Synchronous Serial Interface Encoder products that output absolute position information.
This interface typically consists of clock signals and data signals, featuring the following characteristics:

• Data transmission synchronization with minimal latency
• High resistance to electromagnetic interference
• Suitable for high-precision measurement applications
• The communication structure is relatively simple and stable.

Domestic SSI encoders are developed and manufactured by domestic manufacturers to meet the compatibility requirements of domestic equipment and control systems.

II. Current Status of Domestic SSI Encoder Development

In recent years, domestically produced SSI encoders have made significant progress in the following areas:

• Encoding precision and resolution continue to improve
• Enhanced Timing Stability and Data Consistency
• Enhanced compatibility with domestic PLCs and motion controllers
• Develop application cases in construction machinery and automation equipment

Currently, domestically produced SSI encoders have achieved stable operation in multiple mid-to-high-end industrial applications.

III. Primary Product Types of Domestic SSI Encoders

1. SSI Absolute Rotary Encoder

Used for angle and position measurement, it is the most common application of the SSI interface.

2. SSI Multi-Turn Absolute Encoder

Suitable for systems requiring multi-turn position information recording, such as lifting equipment and construction machinery.

3. SSI Draw-Wire Displacement Encoder

Used for linear displacement measurement, commonly found in telescopic mechanisms and stroke control systems.

4. SSI Explosion-Proof Encoder

For use in industrial environments where flammable and explosive hazards exist.

IV. Typical Application Scenarios for Domestic SSI Encoders

Domestic SSI encoders are widely used in the following fields:

• Construction Machinery Position Feedback
• Automated production line
• CNC Machine Tools and Servo Systems
• Port Crane Equipment
• New Energy Equipment (Wind Power, Photovoltaic)

In these applications, the stability and real-time performance of the SSI interface are particularly critical.

V. Key Considerations for Selecting Domestic SSI Encoder Models

1. Resolution and Accuracy

Verify that the encoder bit depth meets the system's precision requirements.

2. Timing Compatibility

Different control systems have varying requirements for SSI clock frequency and timing; compatibility should be confirmed in advance.

3. Mechanical Installation Configuration

Whether the structure—including shaft diameter, flange, hollow shaft, or solid shaft—is compatible with the equipment.

4. Environmental Adaptability

Whether it meets the requirements of industrial environments such as high temperatures, vibration, and dust.

5. Domestic Substitution and Customization Capabilities

When replacing imported SSI encoders, does it support customization of mounting dimensions, electrical interfaces, and parameters?

VI. Industry Practice Examples of Domestic SSI Encoders

From an engineering application perspective, some domestic encoder manufacturers have accumulated relatively mature application experience in the SSI encoder field. For example, **SIVIDI** offers multiple structural and protocol combination solutions for SSI interface absolute encoders and cable-pull displacement encoders, participating in domestic substitution applications for construction machinery and automation equipment projects.

This type ofEngineering stability and protocol compatibility-orientedThe domestic solution is gradually gaining acceptance among more equipment manufacturers.

VII. Comparison of Domestic SSI Encoders with Other Interface Types

Interface Type	Features	Applicable Scenarios
SSI	Highly real-time and stable	High-Precision Absolute Value Measurement
RS485	Long-range, anti-interference	Construction Site
CANopen	Bus-based, intelligent	Complex Control Systems
Profinet	High-speed, real-time	High-end automation systems
4–20 mA	Simple and reliable	Analog System

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VIII. Conclusion

“Domestic SSI encoders have gradually become one of the key choices in the field of high-precision industrial measurement.
During the actual selection process, it is recommended to focus on:

• Accuracy and Resolution
• Timing and System Compatibility
• Engineering Application Case Studies
• Domestic Substitution and Customization Support Capabilities

With the continuous accumulation of domestic industrial technology, domestically produced SSI encoders demonstrate strong feasibility in an increasing number of mid-to-high-end application scenarios.