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SIMATIC S7-300, CPU 317TF-3 PN/DP, central component, used for PLC, process and safety tasks, 1.5MB main memory, 1 MPI/DP 12MBit/s interface, 2 DP interfaces (drivers), 3 Ethernet PROFINET interfaces with dual port switches, integrated process input/output, front connector (1x 40 poles) and minimum of 8 MB 3 micro memory cards