"assembly line" model the model simulates a conveyor belt and sorting line and is used in simatic courses. it is made entirely of industry standard components. the positions of the work- pieces are ditected with inductive proximity switches and an infrared light barrier. the belt is driven by a stepper motor. industrial momentary- contact switches are used for operator control and leds indicate the status of the "plant". note: can only be supplied inter- nally or to cooperation partner.