TM221ME32TK - Schneider Electric Modicon M221 logic controller

Schneider Electric Modicon M221 logic controller with a documented system role and explicit evidence boundaries.

Documented function

Rebuilt from individual evidence

System position

Unknown: Evidence boundary

Schneider Electric identifies TM221ME32TK as a Modicon M221 logic controller with 32 I/O, PNP transistor outputs, Ethernet, serial, USB, SD card, and two analog inputs.

The M221 hardware guide documents TM221ME32TK with 16 digital inputs, 16 digital outputs, two analog inputs, Ethernet, serial line, USB mini-B programming, and an SD card interface.

The controller sits between field inputs and outputs, machine logic, and supervisory or programming connections in the Modicon M221 system.

Unknown: The control program, expansion modules, field wiring, network topology, firmware, and site-specific compatibility are not established by the captured sources.

Exact reference: TM221ME32TK
Category: PLC / CPU
Evidence checked: 2026-09-12

System role

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

Function: Executes machine control logic using the documented digital and analog I/O.
System position: Sits between field devices, machine outputs, and supervisory or programming connections in the Modicon M221 system.
Upstream / inputs: Receives digital and analog signals from field devices and programming or network data.
Downstream / outputs: Drives connected transistor outputs and exchanges controller data over Ethernet or serial interfaces.
Limitations: Unknown: The control program, expansion modules, field wiring, network topology, firmware, and site-specific compatibility are not established by the captured sources.

Evidence ledger

Facts, inferences, and unknowns are kept separate.

Facts

Schneider Electric identifies TM221ME32TK as a Modicon M221 logic controller with 32 I/O, PNP transistor outputs, Ethernet, serial, USB, SD card, and two analog inputs.
Confidence: high
- www.se.com — retrieved 2026-09-12; high confidence
The M221 hardware guide documents TM221ME32TK with 16 digital inputs, 16 digital outputs, two analog inputs, Ethernet, serial line, USB mini-B programming, and an SD card interface.
Confidence: high
- www.proface.com — retrieved 2026-09-12; high confidence

Inferences

The controller sits between field inputs and outputs, machine logic, and supervisory or programming connections in the Modicon M221 system.
Confidence: medium
Rationale: The guide documents integrated inputs, outputs, analog channels, and communication interfaces, supporting the controller's central system position.
- www.se.com — retrieved 2026-09-12; high confidence
- www.proface.com — retrieved 2026-09-12; high confidence

Unknowns

Unknown: The control program, expansion modules, field wiring, network topology, firmware, and site-specific compatibility are not established by the captured sources.
Confidence: low
Missing evidence: The control program, expansion modules, field wiring, network topology, firmware, and site-specific compatibility are not established by the captured sources.

System position diagram

Diagram showing TM221ME32TK between Field devices and supervisory connections and Machine actuators and controller network. — System position of TM221ME32TK from the captured evidence.

View Mermaid source

flowchart LR
  upstream["Field devices and supervisory connections"] --> item["TM221ME32TK"]
  item --> downstream["Machine actuators and controller network"]

View diagram labels

Nodes: Field devices and supervisory connections; TM221ME32TK; Machine actuators and controller network
Edges: Documented upstream connection; Documented downstream function

Next action

Decision: The evidence supports TM221ME32TK as a Modicon M221 logic controller with a concrete machine-control role; verify the installed program and I/O system before replacement.

Next action: Match the exact controller, I/O wiring, expansion modules, firmware, Ethernet or serial network, and control program against the cited guides.

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