SIMATIC S7-300 · Central Processing Unit Siemens 6ES7315-2EH14-0AB0 CPU 315-2 PN/DP with 384 KB work memory, an MPI/PROFIBUS DP interface and a two-port PROFINET Ethernet interface. 6ES7 315-2EH14-0AB0 KEY PRODUCT INFORMATION CPU CPU 315-2 PN/DP SIMATIC S7-300 controller 384 384 KB Work Memory Integrated program and data memory DP MPI / PROFIBUS DP Integrated isolated RS 485 interface PN PROFINET Ethernet Two RJ45 ports with integrated switch Controller Core for S7-300