Modicon M251PLC

Distributed logic controller without on-board I/O, two Ethernet networks (separate device and control networks) or Ethernet plus CANopen; programmed in EcoStruxure Machine Expert.

Manufacturer: Schneider Electric
Product line: Modicon
Device type: PLC
Communication: Modbus EtherNet/IP CAN / CANopen Ethernet and IP networking
Engineering software: EcoStruxure Machine Expert

Documentation · 2

Modicon M251 Logic Controller, Hardware Guide

EIO0000003101 · Revision 08 · EN

Hardware manual

Installation, power supply, communication ports, LEDs and technical data of M251 controllers.

Official title: Modicon M251 Logic Controller, Hardware Guide
: se.com document page EIO0000003101, version 08 (the page always serves the current version).

Open on manufacturer site download page — always the current edition

Link verified 2026-10-02

Modicon M251 Logic Controller, Programming Guide

EIO0000003089 · Revision 10 · EN

Programming manual

Programming the distributed M251: dual Ethernet networks, Modbus TCP/EtherNet/IP device and scanner, CANopen, TM3/TM5 I/O and diagnostics.

Official title: Modicon M251 Logic Controller, Programming Guide
: se.com document page EIO0000003089, version 10 (the page always serves the current version).

Open on manufacturer site download page — always the current edition

Link verified 2026-10-02

Diagnostics · 0

No reviewed diagnostic records for this family yet.

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