Which device is used to shut down a robot by removing power when a person enters a robot work area?

• A. Electrical interlocks
• B. Safety bolts
• C. Jumper cables
• D. Switches

Answer: (A)

Electrical interlocks are safety devices placed on access doors or gates that automatically remove power or force a safe stop as soon as a door is opened or the boundary is breached. This linkage between the door state and the robot’s power ensures that anyone entering the work area cannot be exposed to a running, potentially dangerous robot. The interlock is designed for this exact purpose: it provides a fail-safe way to shut down the system when safety boundaries are crossed. In contrast, a safety bolt is only a mechanical lock, jumper cables are just power connections, and a general switch doesn't inherently couple door status to power removal in a fail-safe way.