Part

Emergency stop

You might say: e-stop, red button

An emergency-stop device requests a safety stop through the safety-related control system; it is a complementary protective measure, not routine shutdown.

What it does

Stops hazardous motion as quickly as practicable without creating another hazard.

Ask

Which stop category does the risk assessment require, and is reset prevented from restarting motion?

What to look for

1. Red stop button
2. Hazardous motion stopping
3. Actuator power removed or controlled

Catalogue: Stop category

• Category 0: Stop category 0 removes power from the machine actuators immediately; the stop is uncontrolled.
• Category 1: Stop category 1 uses controlled stopping with actuator power available, then removes power when stopped.
• Category 2: Stop category 2 is a controlled stop that leaves actuator power available after the stop.

Connections

• See also: Performance level (PL)

Sources

1. Universal Robots, Emergency Stop, Emergency StopDo not use the emergency stop for routine stopping or as a substitute for normal shutdown or power-off procedures.
2. IDEC, Group Safety Standard: IEC 60204-1:2016, Stop categories and emergency stop, 9.2.3.3–9.2.3.4.2An emergency stop function shall stop the hazardous motion as quickly as practicable without creating other hazards.

Use it on your project

teardown-apply: hold "Emergency stop" (emergency-stop) from the teardown at https://teardownatlas.com/robotics/ against my project

Paste it into a coding agent that has the teardown skills.

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