Overview
Explosion-proof CANopen absolute encoders (SAS-M78) are engineered for hazardous industrial environments where flammable gases, vapors, or combustible dust may be present. The SAS-M78 series delivers deterministic absolute position feedback via CANopen while maintaining certified explosion protection for classified zones.
The 78mm reinforced housing ensures mechanical integrity, allowing safe installation in petrochemical, chemical processing, and mining applications. High-resolution absolute feedback supports motion control, monitoring, and safety-critical interlocks.
Key Functional Features
- CANopen Interface: CiA 301 & CiA 406 compliant for deterministic absolute position transmission
- Single-turn resolution: up to 21 bits
- Multi-turn resolution: up to 14 bits
- Optional incremental outputs for hybrid control systems
- Stable communication under vibration, mechanical stress, and electrical noise
- Environmental protection: IP65 / IP67
- Certified explosion-proof housing for hazardous areas
These features ensure both precise position feedback and compliance with safety regulations in classified zones.
Mechanical Protection and Mounting
The M78 series is designed for mechanical robustness in hazardous conditions:
- Clamp flange – allows repeatable and secure mounting
- Blind hollow shaft flange – facilitates direct shaft installation while maintaining explosion-proof integrity
Reinforced housing and sealed cable entries are engineered to contain internal energy and prevent ignition of surrounding gases or dust.
Shaft Interface Options
- Solid Shaft – preferred when controlled shaft alignment is possible, providing a fixed mechanical reference
- Blind Hollow Shaft – ideal for retrofit or space-constrained installations, reducing the number of intermediate mechanical components
Correct shaft selection and careful alignment are critical for maintaining both encoder performance and explosion-proof compliance.
Environmental Suitability
- Suitable for indoor and outdoor classified industrial environments
- Operates reliably under moderate to high vibration and mechanical stress
- Temperature-rated for typical industrial ranges
- Protected against dust, moisture, and contaminants
Proper grounding, cable routing, and compliance with installation standards are essential to maintain both performance and safety certification.
Typical Applications
- Petrochemical and chemical process equipment
- Mining machinery operating in combustible dust zones
- Oil and gas extraction and processing systems
- Offshore and hazardous-area industrial platforms
The M78 series provides deterministic position feedback essential for motion control, safety interlocks, and process monitoring in hazardous areas.
Engineering Selection Summary
SAS-M78 explosion-proof CANopen absolute encoders combine certified housing, deterministic CANopen feedback, and mechanical robustness for hazardous industrial applications. Engineers should consider environmental classification, shaft interface, and proper mounting to ensure long-term reliability and compliance with safety standards.
Technical Reference
For detailed specifications and mechanical drawings, refer to the corresponding product documentation during final selection.
