What this module is
The Siemens 6AG1315-6FF04-2AY0 is a S7-300 CPU module (type SFB) with integrated safety (PROFIsafe) and railway/ATEX certifications. It supports LAD, FBD, STL, SCL, GRAPH, HiGraph, and CFC programming languages. Rated for -40 to 70 °C ambient, with dimensions 40 mm width, 125 mm height, 130 mm depth. Process image: 244 bytes input / 244 bytes output.
Key ratings and what they mean
FM 8 is a firmware/module identifier; verify compatibility with STEP 7 V5.2 SP1 or higher (HW update required). CFC (Continuous Function Chart) is supported, enabling graphical block-diagram engineering alongside LAD/FBD/STL/SCL. I²t rated at 1 A²·s — this is the thermal withstand of the internal power supply input; coordinate upstream protection accordingly. PROFIsafe allows the module to act as a safety controller with failsafe communication over PROFIBUS/PROFINET.
Compliance and environment
Certified for EN 50155 (railway, sections 4,5,12, T1, Category 1, Class A/B:2007) and ATEX for explosive atmospheres. CE marked.