Which safety feature is a physical barrier used to secure the robot work area?

• A. Light curtains
• B. Safety fences
• C. Floor markings
• D. Mechanical Stops

Answer: (B)

A physical barrier that secures the robot work area is provided by safety fences. They create a solid enclosure around the robot cell, often with locked gates and interlocks, so people cannot reach into the hazardous space while the robot is operating. This containment is what prevents accidental contact and reduces the risk of injury, making safety fences the most effective way to physically separate personnel from the robot’s danger zone.

Other options play important roles but do not provide a true barrier: light curtains are sensors that stop the robot if a beam is broken but don’t physically block access; floor markings give visual cues about hazard zones but don’t stop entry; mechanical stops limit the robot’s movement but don’t prevent someone from entering the space.