Open Truck Unloader with PLC Based Control Panel is a mobile bulk material unloading unit designed for unloading dry bulk materials from standard open trucks.Ÿ Scorpio Engineering Pvt Ltd offers Open Truck Unloader with PLC Based Control Panel. Scorpio Engineering Pvt Ltd also manufactures various types of bulk material handling systems and equipments. The Open Truck Unloader with PLC Based Control Panel has hydraulically articulated 3-arm boom with a suction nozzle and suction pipe attached to it. This Open Truck Unloader is self-contained on a skid with a motor control centre.