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Siemens SIMATIC S7-1200 CPU 1212C 212-1AE40-0XB0

A compact SIMATIC S7-1200 CPU 1212C controller with onboard digital and analog I/O.

System role

Rebuilt from individual evidence

Documented facts

Evidence limits

Siemens documentation identifies this exact reference as a CPU 1212C ordering variant.

The Siemens documentation describes a CPU 1212C DC/DC/DC with 8 digital inputs, 6 digital outputs, 2 analog inputs and 100 KB memory.

This PLC CPU executes the control program and processes onboard digital and analog I/O for an S7-1200 control system.

Unknown: installation-specific compatibility, firmware, wiring and unit condition.

Exact reference
212-1AE40-0XB0
Category
PLC / CPU
Evidence checked
2026-09-11

System role

This section explains what the product does and where it acts in the surrounding system.

Function
This PLC CPU executes the control program and processes onboard digital and analog I/O for an S7-1200 control system.
System position
It sits between upstream control or power and the downstream machine or network within the S7-1200 controller boundary.
Upstream / inputs
It receives sensor inputs, program data and network messages.
Downstream / outputs
It sends digital outputs, processed analog values and control data.
Limitations
Unknown: installation-specific compatibility, firmware, wiring and unit condition.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

  • Siemens ordering and data-sheet documentation identifies the full article 6ES7 212-1AE40-0XB0, whose exact reference suffix is 212-1AE40-0XB0.

    Confidence: high

  • The Siemens documentation describes a CPU 1212C DC/DC/DC with 8 digital inputs, 6 digital outputs, 2 analog inputs and 100 KB memory.

    Confidence: high

Inferences

  • This PLC CPU executes the control program and processes onboard digital and analog I/O for an S7-1200 control system.

    Confidence: high

    Rationale: The source-backed identity and technical specification support the stated function and system position.

Unknowns

  • Unknown: installation-specific compatibility, firmware, wiring and unit condition.

    Confidence: low

    Missing evidence: A unit-specific inspection and complete installation record are not present in the captured sources.

System position diagram

Diagram showing 212-1AE40-0XB0 between upstream control or power and downstream machine or network.

Reading limit: system position only, not a wiring or safety drawing.

System path showing where 212-1AE40-0XB0 receives inputs and sends controlled outputs.

Enlarged system diagram

Diagram showing 212-1AE40-0XB0 between upstream control or power and downstream machine or network.

System path showing where 212-1AE40-0XB0 receives inputs and sends controlled outputs.

View Mermaid source
flowchart LR\n  upstream[Upstream control or power] --> product[212-1AE40-0XB0]\n  product --> downstream[Machine or network]
View diagram labels
Nodes
Upstream control or power; 212-1AE40-0XB0; Machine or network
Edges
Upstream command or power path; Controlled output or status path

Next action

The captured evidence supports this exact reference as a documented industrial component in the stated system role.

Verify host compatibility, wiring, firmware and unit condition before installation.

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