In the high‑frequency start‑stop cycles of a conveyor‑driven assembly cell, the AC contactor with screw‑tightened terminals serves as the decisive switching element for the motor supply. Integrated into a PLC‑controlled cabinet, it receives command signals from the controller and makes or breaks the power line to drive units such as feed rollers, positioning axes, or pneumatic valves. The screw‑clamped connections guarantee a secure mechanical bond that tolerates the vibration and temperature swings typical of automated production lines, while the contactor’s built‑in overload protection isolates the circuit during fault conditions. This arrangement allows operators to program precise motion sequences, pause the line for quality checks, and quickly restart without manual rewiring. In sheet‑metal die making, the same contactor type is employed to control the spindle motor of a press, providing the same reliable on‑off function while the die is changed. By handling the main power switching, the contactor enables the overall system to maintain continuous operation and meet the tight cycle times demanded by modern automation plants.