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Safety - February 2004Safeguard for container terminalHamburg harbour is growing: on Hamburger Hafen und Lagerhaus and Hapag-Lloyd have started the first stage extension of the new Altenwerder Container Terminal (CTA). From the middle of 2004, 1.9 million shipping containers will be handled annually in an area measuring 225,000m2. CTA is one of the first with large-scale automation, with container gantries, cranes, automatic guided vehicles and railway loading gantries. A safe, open SafetyBus p system is employed to guarantee the safe handling of containers on the gantries. With 90 Pilz PSS programmable safety controllers and 45 bridge devices to link sections of the network, it is by far the largest installed SafetyBus p system to date. When the extension is complete, four large container ships will be able to dock at the 1400m quayside. Fast unloading and loading of the four vessels is guaranteed by the 14 Super Postpanmax container-gantries. Automatic guided vehicles (AGVs) then take the container and move it to a storage area located at the rear of the quayside. System requirements include the safe operation of the emergency stop systems, the safe measuring of the weight and the overspeed of the lifting motion, complete with networked presentation providing detailed information and analysis. A primary consideration was the reaction time, bearing in mind that the cranes move at speeds of up to 3m/s. A further specialised requirement was the use of fibre-optic cable for the extension of the dock. SafetyBus p contributed to a significant reduction in wiring complexity.
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