ISO 13850:2015 Emergency Stop Requirements for Machinery Explained
ISO 13850:2015 "Safety of Machinery — Emergency Stop Function" is a key technical specification for the crane industry. As an international standard governing emergency stop function design in machinery safety, it defines actuating force, color coding, reset methods, and functional safety requirements for emergency stop devices.
The standard provides a unified technical basis for design personnel, inspection bodies, and end users. Kelude strictly follows its technical requirements throughout product development and manufacturing to ensure compliance and reliability.
Scope and Positioning of the Standard
ISO 13850:2015 sets out the technical requirements and safety indicators for machinery safety related to crane operations. It applies to all types of lifting appliances with a rated lifting capacity above 0.5 t.
Core Technical Parameters
Per ISO 13850:2015, the design and manufacturing of emergency stop functions must satisfy a stringent set of core technical parameters. The parameter cards below summarize the standard's key technical indicators:
Comparative Analysis of Key Parameters
| Item | technical requirements | Description |
|---|---|---|
| Operating Force | ≤60N(Manual Push)/≤200N(Foot Pedal) | Momentary (Self-Returning) |
| Color Coding | Red Mushroom Head+Yellow Background | Red RAL 3020/Yellow RAL 1003 |
| SILRequirement | SIL2(PLd) | Hard Wiring Safety Relay |
| Reset Method | Manual Rotationor Pull-to-Reset | Non-Self-Reset (Maintained) |
| Contact Configuration | Double-Break NC Contacts in Series | redundant design HFT=1 |
| Response time | Push-to-Trip (Power Isolation)≤0.2s | oscilloscope Record |
Inspection Requirements and Intervals
| Item | technical requirements | Description |
|---|---|---|
| Function Testing | Pressemergency stop Test Trip | Weekly+Verify All Power Is Disconnected |
| Response time | oscilloscope/High-Speed Counting | Annual+≤0.2s |
| Reset Inspection | Manual Restoration After Reset | Monthly+Non-Self-Reset (Maintained) |
| Contact Status | Dual Contacts Inching / Jog Mode Operational Consistency | Annual+redundancy Testing |
Safe Operation and Management Requirements
Under ISO 13850:2015, safe operation and routine management play a critical role in crane safety. The standard places strong emphasis on operator qualification and training, requiring that all operators complete specialized training and hold the appropriate certifications before being permitted to work.
FAQ
Q: What are the ISO 13850 requirements for emergency stop devices?
A: Red mushroom head ≥25 mm, actuating force ≤60 N, yellow background. Red RAL 3020, yellow RAL 1003.
Q: Why can't an emergency stop be self-resetting?
A: Automatic reset could allow the machine to restart before the fault has been cleared. The device must be reset manually by rotation, and resetting must not start the equipment.
Q: What SIL rating is required for the emergency stop circuit?
A: At least SIL2 (PLd). Dual-channel hard-wired safety relay with normally closed contacts in series for redundancy. Response time ≤0.2 s.
Q: How often should emergency stop devices be tested?
A: Weekly functional test to cut off all power. Annual response time check ≤0.2 s. Monthly inspection to confirm the device does not auto-reset.
Kelude Heavy Industry — specializing in crane design and manufacturing, fully compliant with the ISO 13850:2015 standard system, offering lifecycle service from solution design and manufacturing and installation to after-sales maintenance.
