Controls › C-E4
Physical safety interlock
Safety-rated stop, presence detection, guarded envelope.
Envelope layerMissing or failed in 1 case (1 ended in harm)Worked in 0Machines: 1
Where it was missing or failed
The third column is what this control would have looked like in that case: the concrete form, not the abstract name.
| Case | World | What it would have looked like here | Status | Outcome |
|---|---|---|---|---|
| Sorting robot, Korea 2023 (boundary) | Machines | Presence detection and safety-rated stop; Guarded work envelope during maintenance; Lockout during sensor inspection (the sources do not say whether these existed) | absent | Ended in harm |
Rules and standards that map to it
Strength says whether the rule's text requires this control, implies it, or only recommends it. Draft mappings are the Register's reading, not yet checked by a person, and none is legal advice.
| Rule | Strength | Where, and why | Jurisdiction |
|---|---|---|---|
| IEC 61511: functional safety of safety instrumented systems for the process industry (draft mapping) | Recommended | physical safety interlock independent of the control layer | International standard |
| ISO 10218: robots and robotic devices, safety requirements for industrial robots (adopted in the United States as ANSI/A3 R15.06-2025) (draft mapping) | Recommended | protective stops and safeguarded spaces are physical interlocks (Korea sorting robot) | International standard |
Deploying something? Check a deployment ranks every control against the cases that match your profile. Patterns shows where this control fails across worlds.