What this order code delivers
The Siemens 6AG1212-1AE40-2XB0 is the SIPLUS extended-temperature variant of the CPU 1212C (standard order code 6ES7212-1AE40-0XB0). It is a compact PLC with onboard PROFINET, supporting programming in FBD, LAD, and SCL. Rated supply is 24 V DC with a dropout threshold of L+ minus 4 V DC. Operating ambient range is -40 to 70 °C — the main reason to specify this code over the standard version. It carries 1 Mbyte of integrated load memory and includes a web server, PID control, and forced-variable capability.
How it compares to the standard CPU 1212C
The 6AG1212-1AE40-2XB0 differs from the standard 6ES7212-1AE40-0XB0 primarily in its ambient temperature rating: -40 to 70 °C versus the standard's 0 to 60 °C (typical; see standard datasheet). All other functional specs — PROFINET interface, 24 V DC supply, programming languages, web server, 1 Mbyte load memory, and forced-variable support — are identical. The physical dimensions (90 × 100 × 75 mm) and connector layout are unchanged, so the 6AG variant drops into any panel designed for the standard CPU 1212C without rewiring or mechanical rework.
Integration notes for panel builders
Mounting dimensions match the standard S7-1200 footprint: 90 mm width, 100 mm height, 75 mm depth. PROFINET is on board — no extra module needed for Ethernet-based control. PROFIBUS requires the CM 1243-5 communication module. The backup time for the real-time clock is typ. 480 h. For signal wiring: 0 to +10 V analog inputs are adjustable; sourcing sensors up to 2-wire type are supported. The web server is enabled by default; configure via TIA Portal.