Two normally open limit switches in series to control two cylinders implement which logic?

• A. OR
• B. AND
• C. NOT
• D. XOR

Answer: (B)

Series wiring of two normally open limit switches creates an AND condition: current flows only if both switches are closed. Each switch closes only when its actuator is engaged, so the control path is complete only when both limits are reached, energizing the two cylinders. If either switch remains open, the circuit is broken and nothing activates. Wiring them in parallel would give OR behavior (either switch closing would energize). A NOT action would come from inverting a single input, not two in series, and XOR would require a more complex arrangement to ensure exactly one is active at a time.