Siemens 6ES7518-4AP00-0AB0 S7-1500 CPU 1518-4 PN/DP 6MB/60MB Programmable Logic Controller

The Siemens 6ES7518-4AP00-0AB0 is a SIMATIC S7-1500 CPU 1518-4 PN/DP with 6 MB program memory and 60 MB data memory, running bit operations at 1 ns. It provides four interfaces: PROFINET IRT with an integrated 2-port switch, PROFINET RT, Ethernet, and PROFIBUS, and requires a SIMATIC Memory Card to operate.

Technical Specifications

Selection Notes

With 6 MB program memory, 60 MB data memory, and a 1 ns bit-operation time, this CPU sits above smaller-memory CPUs in the S7-1500 PN/DP line, so it fits large programs, heavier recipe or data-logging footprints, and isochronous cycles down to 125 microseconds in distributed mode - useful for synchronized multi-axis motion segments needing the shortest achievable cycle. The fourth interface is a dedicated Ethernet port separate from the two PROFINET (IRT/RT) ports and the PROFIBUS port, so IT-level traffic such as diagnostics or MES/ERP data exchange can run on its own physical connection instead of sharing bandwidth with the PROFINET segments. A SIMATIC Memory Card is mandatory - the CPU will not run without one plugged into its single card slot.

Applications

Large machine or process control needing large program and data memory, isochronous PROFINET IRT motion cycles down to 125 microseconds, and a dedicated IT-network Ethernet port alongside PROFINET RT and PROFIBUS field networks.