Siemens 6ES7 318-2AJ00-0AB0 CPU Module

Siemens 6ES7 318-2AJ00-0AB0 CPU Module is the SIMATIC S7-300 CPU 318-2 DP, a compact controller designed for DP-enabled automation tasks. It provides two RS-485 communications interfaces: an MPI/Profibus DP master/slave interface and a Profibus DP master/slave interface, both operating at 12 Mbit/s to connect the PLC with field devices, drives, and other controllers. The module includes 512 KB of memory for the user program and data (256 KB code, 256 KB data) and is powered from an integrated 24 V DC supply, simplifying cabinet wiring. There are no built-in I/O channels on this CPU; external I/O modules are used on the S7-300 rack to form the complete control system. Programming and configuration are done with STEP 7 (V5.0 compatible tooling), enabling project-level management of the CPU 318-2 DP and its DP communications. This CPU is well-suited for compact, DP-connected control tasks where centralized processing and reliable fieldbus communication are required, while keeping I/O expansion modular via external modules.