If you must enter the work envelope of a robot, the teach pendant should be turned off to keep the robot from moving.

• A. True
• B. False
• C. Depends on the model
• D. Only during maintenance

Answer: (B)

Entering a robot’s work envelope requires ensuring the robot cannot move. The teach pendant is just an interface to control or program the robot; turning it off does not automatically disable the robot’s motion or its safety systems. The controller and servos can remain energized, and stored programs or other control paths could still command movement, or external forces could cause motion. Safe practice is to use proper safety steps that truly disable motion—such as engaging the emergency stop, enabling a maintenance/lockout mode, or isolating power through a disconnect and safety interlocks—before you step into the envelope. In short, turning the pendant off is not a reliable way to prevent movement.