The Siemens 6ES7313-6BF03-0AB0 is a SIMATIC S7-300 CPU for medium-scale control. It programs in FBD, LAD, SCL, STL, GRAPH, or HiGraph — choose the tool that fits the sequence, not the other way around. The CPU addresses 248 inputs and 248 outputs, with space for 8 function modules (FM 8).
Thermal headroom and communication
The I2t rating of 0.7 A²·s sets the thermal limit for the internal power stage — keep that curve in mind if the cabinet ambient runs above 40 °C, because derating applies before the CPU trips. Two RS485 ports (RS 422/485 per X.27) serve the MPI/DP network; note that MPI is not native on this version, so an HMI needs a CP. ASCII serial is available for simple peripheral links.