SIMATIC S7-400, CPU416F-3 PN/DP Central processing unit with: work memory 11.2 MB, (5.6 MB code, 5.6 MB data), Interfaces: 1st interface MPI/DP 12 Mbit/s, 2nd interface Ethernet/PROFINET, 3rd interface plug-in IFM module Can be used with software package S7 Distributed Safety from V5.4