Technical FAQs

Ask a Question

XY2CH European Safety Standard

Conforming to ISO 13850 European Union Machinery Directive safety circuits must use the emergency stop devices with 2 N.C. contacts in category 3 or 4 safety control systems. What are the parameters of category 3 & 4 of the European Safety Standard?

Product Line:
XY2CH, XY2CE Cable Pull Switches

Machine Safety Products, Safety Solutions XY2

Assembly/wiring- Accessories

European Safety Standard requires the system principles to achieve safety conform to the following system behaviors, redundancy & redundancy + self monitoring: standard 3 & 4 respectively.
Redundancy: For a single fault, the safety function is always ensured. Only some faults will be detected. The accumulation of undetected faults can lead to loss of the safety function.
Redundancy + Self-monitoring:  When faults occur, the safety function is always ensured. Faults will be detected in time to prevent loss of safety function
Was this helpful?
What can we do to improve the information ?