Siemens 6ES7211-1AE40-0XB0 SIMATIC S7-1200 CPU 1211C DC/DC/DC 6DI/4DO/2AI PLC

The Siemens 6ES7211-1AE40-0XB0 is a SIMATIC S7-1200 CPU 1211C DC/DC/DC, a compact PLC with 24 V DC power supply, DC inputs, and DC outputs. It integrates 6 digital inputs, 4 digital outputs, and 2 analog inputs on board, with 75 KB of combined program and data memory and a single PROFINET interface.

Technical Specifications

Certifications & Standards

• CE mark
• UL approval
• cULus
• FM approval
• RCM
• KC approval
• Marine approval

Selection Notes

The DC/DC/DC power scheme means both the CPU supply and the outputs run on 24 V DC, so it fits panels already standardized on a single low-voltage rail rather than mixing in an AC/DC/relay CPU. With 6 DI/4 DO/2 AI onboard and no relay outputs, it suits machines controlled entirely through DC field devices and drives with 0-10 V analog references; applications needing relay outputs or AC-switched loads directly from the CPU require a different power variant in the same S7-1200 family. The 100 kHz high-speed counting inputs and pulse train outputs support basic single-axis positioning or frequency measurement without an added technology module.

Applications

Small machine and equipment control where a compact CPU with onboard analog inputs replaces a separate analog input module, including applications using the high-speed counters for encoder feedback or flow pulse counting.