6ES7315-2AH14-0AB0 Siemens 6ES7315-2AH14-0AB0 SIMATIC S7-300 CPU315-2 DP Controller, MPI/DP, 256KB. Siemens 6ES7 315-2AH14-0AB0 SIMATIC S7-300 CPU 315-2 DP Standard Controller with 1 x RS-485 Interface (MPI) and 1 x RS-485 Interface (PROFIBUS DP Master/Slave), 256 Kbytes Memory for User Program and Data, No Integrated I/O, Integrated 24V DC Power Supply.