Siemens 6AG1516-3AN01-2AB0 is a SIPLUS CPU for the ET 200SP distributed I/O system, built to operate from -40 °C to 70 °C — meaning it carries the standard Siemens SIMATIC S7-1500 controller functions into freezer or hot manufacturing environments without derating. It supports PROFINET IRT for isochronous motion networks and MRP as redundancy manager (up to 50 devices in the ring). Modbus TCP and RS-485 interfaces enable mixed-protocol lines where legacy fieldbus gear coexists with PROFINET. The process image handles 32 kbyte of inputs and 32 kbyte of outputs — enough for moderate machine footprints. Programming languages include LAD, FBD, STL, SCL, and GRAPH (from STEP 7 V12 SP1). The hardware clock and block (valve-specific PID) suit it for process control loops with actuated valves rather than simple on/off outputs.
Mounting and I/O note
Dimensions: 70 mm wide, 147 mm high, 129 mm deep; up to eight communication modules stack on the same backplane. I2t rated at 0.39 A²·s — select output wire cross-section accordingly. Below 0 °C the CPU's display (if fitted) may show reduced legibility and dynamic updates slow — not a hard stop, but worth noting for cold cabinets where an operator reads status directly. The CPU does not support PROFIsafe; safety applications need a separate F-CPU.