Siemens 6ES7516-3AP03-0AB0 SIMATIC S7-1500 CPU 1516-3 PN/DP 2MB/7.5MB Programmable Logic Controller

The Siemens 6ES7516-3AP03-0AB0 SIMATIC S7-1500 CPU 1516-3 PN/DP is a mid-range CPU with 2 Mbyte program memory, 7.5 Mbyte data memory, and three onboard fieldbus interfaces: PROFINET IRT with an integrated 2-port switch, a second PROFINET RT port, and PROFIBUS DP. Bit-instruction processing runs at 6 ns, and it supports up to 256 connected IO devices across 64 distributed I/O systems.

Technical Specifications

Selection Notes

The -3 in the type designation marks the onboard PROFIBUS interface alongside dual PROFINET ports, so this CPU covers a base CPU 1516-3 PN/DP plus a separate PROFIBUS communication module in one unit when the plant still runs legacy PROFIBUS devices alongside PROFINET. Two integrated IO Controllers plus up to 8 more via communication modules support up to 256 IO devices total, enough for a mid-size machine or small line without an external IO controller. Isochronous mode down to a 375 microsecond distributed cycle applies only on the IRT-capable first PROFINET port with its 2-port switch, so isochronous drives or fast axis synchronization must connect there rather than to the second, RT-only PROFINET interface. A SIMATIC Memory Card is required for operation and is not included in the scope of delivery.

Applications

Mid-size machine and line control needing simultaneous PROFINET IRT for motion or isochronous I/O, PROFINET RT, and PROFIBUS DP connectivity from one CPU.