Siemens SIMATIC S7-1200 CPU 1211C DC/DC/DC PLC – 6ES7211-1AE40-0XB0

Siemens 6ES7211-1AE40-0XB0 SIMATIC S7-1200 CPU 1211C

The Siemens 6ES7211-1AE40-0XB0 is a SIMATIC S7-1200 CPU 1211C compact PLC designed for small machine automation and industrial control applications. This DC/DC/DC version operates from a 20.4–28.8 V DC power supply and provides 75 KB of program/data memory. Siemens Industry Support

The controller includes 6 onboard 24 V DC digital inputs, 4 onboard 24 V DC transistor digital outputs, and 2 integrated 0–10 V DC analog inputs. These built-in I/O points make the CPU suitable for compact automation systems requiring digital sensor inputs, actuator control, and basic analog signal acquisition without immediately requiring additional I/O modules. Siemens Industry Support

6ES7211-1AE40-0XB0 Communication and Programming

The CPU 1211C belongs to the SIMATIC S7-1200 Basic Controller family. Its integrated Ethernet/PROFINET interface provides communication for programming, diagnostics, HMI integration, and compatible industrial Ethernet devices.

Programming is carried out with SIMATIC STEP 7 in TIA Portal, allowing the controller to be integrated into Siemens automation projects together with HMIs, distributed devices, and other supported SIMATIC components.

Integrated I/O and Expansion

The onboard I/O configuration consists of:

• 6 digital inputs — 24 V DC
• 4 digital outputs — 24 V DC transistor
• 2 analog inputs — 0–10 V DC
• 75 KB program/data memory
• 20.4–28.8 V DC supply

These specifications are published by Siemens for the exact article number 6ES7211-1AE40-0XB0. Siemens Mall

The two analog inputs can be used with compatible 0–10 V transmitters and sensors, while the digital inputs and transistor outputs support typical machine-control functions such as sensor monitoring, interlocking, sequencing, indication, and actuator control.

Compact PLC for Machine Automation

The CPU 1211C is intended for compact control applications where a small PLC with integrated I/O and Ethernet communication is required. Typical technically compatible applications include small conveyor systems, pump sequencing, compact packaging equipment, machine interlocking, assembly stations, basic process monitoring, and training systems.

Application suitability should always be checked against the required I/O quantity, output load, communication architecture, safety requirements, and control program.

Official Siemens Manufacturer Links

Official Siemens Product Page:
Siemens 6ES7211-1AE40-0XB0 Product Page

Official Siemens Technical Datasheet:
Siemens 6ES7211-1AE40-0XB0 Technical Datasheet

Siemens currently lists this exact article as a SIMATIC S7-1200 CPU 1211C DC/DC/DC with 6 DI, 4 DO, 2 AI, 20.4–28.8 V DC supply, and 75 KB program/data memory.