Mobile machinery increasingly depends on advanced electronics for automation, diagnostics, and machine control.
Failures in electronic systems may cause:
- Serious injury
- Unexpected machine movement
- Hydraulic hazards
- Loss of braking or steering
- Equipment damage
Understanding Functional Safety
Functional safety ensures systems respond correctly to dangerous conditions.
Typical safety functions include:
- Emergency stop
- Safe torque off
- Safe braking
- Operator presence detection
- Collision avoidance
Relevant Standards
Important standards include:
- ISO 13849-1
- IEC 62061
- ISO 25119
- IEC 61508
Risk Assessment
Every safety design begins with hazard analysis and risk assessment.
Typical hazards include:
- Crushing
- Entanglement
- Runaway vehicles
- Falling loads
- Unexpected startup
Environmental Challenges
Mobile machinery electronics must survive:
- Vibration
- Shock
- Moisture
- Dust
- Electrical transients
- Extreme temperatures
Safety Architecture Principles
Important design principles include:
- Redundancy
- Diagnostics
- Fail-safe design
- Communication monitoring
CAN-Bus Safety Communication
Safe communication protocols include:
- CANopen Safety
- J1939 Safety extensions
- ProfiSafe gateways
Conclusion
Functional safety in mobile machinery requires robust hardware, reliable communication, diagnostics, cybersecurity, and compliance with safety standards.