In a ladder logic rung, where is the output located relative to the input conditions?

• A. Left side
• B. Center
• C. Far Right
• D. Top

Answer: (C)

In ladder logic, you read a rung as a left-to-right path: power or the control signal enters from the left, passes through the input devices (contacts) on the left, and, if the path is complete, reaches the actuator on the right. The output coil or function block is placed at the far right of the rung, so it’s energized only when the input conditions on the left are satisfied. That visual arrangement mirrors the flow of logic: inputs on the left, output on the far right. The center or top locations aren’t where outputs are drawn, and the left side is where the inputs reside.