Siemens 6ES7 614-1AH03-0AB3 CPU Module SIMATIC S7

Siemens 6ES7-614-1AH03-0AB3 CPU module for the SIMATIC S7-300 family is a Special CPU 614 device that serves as the central processing unit for legacy PLC racks. It provides 128 KB of memory to store the control program and data, aligning with other 614-series CPUs used in industrial automation. This model uses an MMC memory card for program storage, enabling loading and updating of ladder logic without changing the CPU core, a characteristic noted in references for this CPU family. In catalog listings this same part is often shown as 6ES7614-1AH03-0AB3, reflecting the same hardware across slightly different part-number schemes. Typical applications include machine control, conveyors, and packaging processes where an S7-300 CPU614 is appropriate, leveraging the familiar Step7/SIMATIC logic environment and integration with standard S7-300 I/O modules. This CPU module is documented in Siemens reference materials and supplier listings as a bona fide SIMATIC S7-300 CPU614 device, targeting repair, replacement, or legacy system maintenance for industrial automation deployments.