Which device physically separates personnel from the robot's work envelope?

• A. Teach Pendant
• B. Light Curtains
• C. Safety Fences
• D. Interlocks

Answer: (C)

Safety fences provide the fixed physical boundary that separates people from the robot’s work envelope. They create a concrete barrier around the hazardous area, so personnel cannot enter without going through a controlled point, typically with gates that use safety interlocks to stop the robot if opened. Light curtains, while protective, are sensor-based and detect intrusion to stop the robot rather than providing a solid barrier. A teach pendant is a control device for programming or manually operating the robot, not a barrier. Interlocks are safety switches on access points that enforce the barrier, but the physical separation comes from the fence itself.