siemens et200sp cpu, 6ES7155-6AU30-0CN0 - I-O (Siemens) - Heitek Automation - the best, Siemens SIMATIC 6ES75101SJ010AB0 Central Processing CPU 1510SP F-1 PN for ET 200SP, 1st PROFINET IRT with 3-port switch, 72 ns bit Performance, SIMATIC Memory Card BusAdapter Required for Ports