Siemens 6ES7516-3AN01-0AB0 Programmable Logic Controller CPU Module

Siemens 6ES7516-3AN01-0AB0 is a SIMATIC S7-1500 CPU 1516-3 PN/DP, a central processing unit for the S7-1500 family that integrates control logic with three built‑in network interfaces. With 1 MB of program memory and 5 MB of data memory, it accommodates user programs and runtime data for mid‑sized automation tasks. Its communication stack includes PROFINET IRT with a built‑in 2‑port switch, PROFINET RT, and PROFIBUS, delivering high bit‑timing performance around 10 ns. A SIMATIC Memory Card is required for program and data storage. This CPU is designed for applications requiring integrated PROFINET/PROFIBUS connectivity within the S7-1500 platform, and Siemens notes that this model was replaced by the successor 6ES7516-3AN02-0AB0.