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  • Main
    range of product
    Modicon M251
    product or component type
    Logic controller
    [Us] rated supply voltage
    24 V DC
    Complementary
    number of I/O expansion module
    7 with local I/O architecture
    14 with remote I/O architecture
    supply voltage limits
    20.4...28.8 V
    inrush current
    <= 50 A
    power consumption in W
    32.6...40.4 W with max number of I/O expansion module
    memory capacity
    8 MB program
    64 MB system memory RAM
    data backed up
    128 MB built-in flash memory backup of user programs
    data storage equipment
    <= 32 GB SD card optional
    battery type
    BR2032 lithium non-rechargeable, battery life: 4 yr
    backup time
    2 years at 77 °F (25 °C)
    execution time for 1 KInstruction
    0.3 ms event and periodic task
    0.7 ms other instruction
    execution time per instruction
    0.022 µs
    application structure
    4 cyclic master tasks
    8 external event tasks
    3 cyclic master tasks + 1 freewheeling task
    8 event tasks
    realtime clock
    With
    clock drift
    <= 60 s/month at 77 °F (25 °C)
    integrated connection type
    USB port with mini B USB 2.0 connector
    Non isolated serial link "serial" with RJ45 connector; physical interface: RS232/RS485
    Dual-port "Ethernet 1" with RJ45 connector
    Ethernet port "Ethernet 2" with RJ45 connector
    supply
    5 V at 200 mA serial link supply with "serial" marking
    transmission rate
    1.2...115.2 kbit/s (115.2 kbit/s by default) for bus length of 15 m - communication protocol: RS485
    1.2...115.2 kbit/s (115.2 kbit/s by default) for bus length of 9.84 ft (3 m) - communication protocol: RS232
    480 Mbit/s for bus length of 9.84 ft (3 m) - communication protocol: USB
    communication port protocol
    USB port - USB protocol ; transmission frame: SoMachine-Network
    Non isolated serial link - Modbus protocol ; transmission frame: RTU/ASCII or SoMachine-Network with master/slave method
    port Ethernet
    "Ethernet 1" marking 10BASE-T/100BASE-TX - 2 port copper cable
    "Ethernet 2" marking 10BASE-T/100BASE-TX - 1 port copper cable
    web services
    Web server
    communication service
    FDR
    Downloading
    IEC VAR ACCESS
    Modbus TCP client
    Modbus TCP server
    Modbus TCP slave device
    Monitoring
    NGVL
    Programming
    Updating firmware
    SMS notifications
    DHCP client (Eth1)
    DHCP server (Eth2)
    Ethernet/IP originator (Eth2)
    Ethernet/IP target (Eth1, Eth2)
    Ethernet/IP scanner (Eth2)
    Modbus TCP I/O Scanner and Messaging (Eth2)
    SNMP client/server
    FTP client/server
    SQL client
    Send and receive email from the controller based on TCP/UDP library
    Web server (WebVisu & XWeb system)
    OPC UA server
    DNS client
    maximum number of connections
    8 Modbus server
    8 Modbus client
    16 Ethernet/IP target
    4 FTP server
    10 web server
    8 SoMachine protocol
    number of slave
    16 Ethernet/IP
    64 Modbus TCP
    cycle time
    64 ms with 64 slave(s) on Modbus TCP
    10 ms with 16 slave(s) on Ethernet/IP
    local signalling
    1 LED green SD card access (SD)
    1 LED red BAT
    1 LED green SL
    1 LED red I/O error (I/O)
    1 LED red bus fault on TM4 (TM4)
    1 LED green Ethernet activity (ETH1)
    1 LED green Ethernet activity (ETH2)
    1 LED red module error (ERR)
    1 LED green PWR
    1 LED green RUN
    electrical connection
    Removable screw terminal block power supply with pitch 5.08 mm adjustment
    insulation
    Non-insulated between supply and internal logic
    Between supply and ground at 500 V AC
    marking
    CE
    surge withstand
    1 kV (shielded cable) with common mode protection conforming to EN/IEC 61000-4-5
    1 kV (power lines) with common mode protection conforming to EN/IEC 61000-4-5
    0.5 kV (power lines) with differential mode protection conforming to EN/IEC 61000-4-5
    mounting support
    Top hat type TH35-15 rail conforming to IEC 60715
    Top hat type TH35-7.5 rail conforming to IEC 60715
    Plate or panel with fixing kit
    height
    3.54 in (90 mm)
    depth
    3.74 in (95 mm)
    width
    2.13 in (54 mm)
    product weight
    0.49 lb(US) (0.22 kg)
    Environment
    standards
    CSA C22.2 No 142
    ANSI/ISA 12-12-01
    UL 1604
    CSA C22.2 No 213
    EN/IEC 61131-2 : 2007
    Marine specification (LR, ABS, DNV, GL)
    UL 508
    product certifications
    cULus
    CSA
    resistance to electrostatic discharge
    4 kV (on contact) conforming to EN/IEC 61000-4-2
    8 kV (in air) conforming to EN/IEC 61000-4-2
    resistance to electromagnetic fields
    9.14 V/yd (10 V/m) (80 MHz...1 GHz) conforming to EN/IEC 61000-4-3
    2.74 V/yd (3 V/m) (1.4 GHz...2 GHz) conforming to EN/IEC 61000-4-3
    0.91 V/yd (1 V/m) (2 GHz...3 GHz) conforming to EN/IEC 61000-4-3
    resistance to fast transients
    1 kV (Ethernet line) conforming to EN/IEC 61000-4-4
    1 kV (serial link) conforming to EN/IEC 61000-4-4
    2 kV (power lines) conforming to EN/IEC 61000-4-4
    resistance to conducted disturbances
    10 V (0.15...80 MHz) conforming to EN/IEC 61000-4-6
    3 V (0.1...80 MHz) conforming to Marine specification (LR, ABS, DNV, GL)
    10 V (spot frequency (2, 3, 4, 6.2, 8.2, 12.6, 16.5, 18.8, 22, 25 MHz)) conforming to Marine specification (LR, ABS, DNV, GL)
    electromagnetic emission
    Conducted emissions - test level: 120...69 dBµV/m QP (power lines) at 10...150 kHz conforming to EN/IEC 55011
    Conducted emissions - test level: 63 dBμV/m QP (power lines) at 1.5...30 MHz conforming to EN/IEC 55011
    Radiated emissions - test level: 40 dBμV/m QP class A (10 m) at 30...230 MHz conforming to EN/IEC 55011
    Conducted emissions - test level: 79...63 dBμV/m QP (power lines) at 150...1500 kHz conforming to EN/IEC 55011
    Radiated emissions - test level: 47 dBμV/m QP class A (10 m) at 230...1000 MHz conforming to EN/IEC 55011
    immunity to microbreaks
    10 ms
    ambient air temperature for operation
    14...131 °F (-10...55 °C) horizontal installation
    -10...35 °C vertical installation
    ambient air temperature for storage
    -13...158 °F (-25...70 °C)
    relative humidity
    10...95 % without condensation in operation
    10...95 % without condensation in storage
    IP degree of protection
    IP20 with protective cover in place
    pollution degree
    2
    operating altitude
    0...6561.68 ft (0...2000 m)
    storage altitude
    0...9842.52 ft (0...3000 m)
    vibration resistance
    3.5 mm at 5...8.4 Hz on symmetrical rail
    3 gn at 8.4...150 Hz on symmetrical rail
    3.5 mm at 5...8.4 Hz on panel mounting
    3 gn at 8.4...150 Hz on panel mounting
    shock resistance
    15 gn during 11 ms
    Offer Sustainability
    Sustainable offer status
    Green Premium product
    RoHS (date code: YYWW)
    Compliant  - since  1350  -  Schneider Electric declaration of conformity
    Schneider Electric declaration of conformity
    REACh
    Product environmental profile
    Product end of life instructions
  • Documents and Downloads

    Language
    • English
    • Kazakh
    • Spanish
    • Portuguese
    • Russian
    • French
    • Italian
    • German
    • Chinese
    • Turkish
    User guide
    Date
    Size
    Add to My Documents
    Modicon TM4 - Modules d’extension, Guide de programmation (Version 03)
    Modicon TM4 - Expansion Modules - Hardware Guide (Version 00)
    EcoStruxure Machine Expert Industrial Ethernet Overview - User Guide (Version 00)
    Modicon M251 Logic Controller, Programming Guide (Version 05)
    Material Handling - Front End Processor M251, Project Template User Guide (Version 00)
    SoMachine - SQL Remote Access, Example Guide (Version 00)
    SoMachine - TcpUdpCommunication, Example Guide (Version 00)
    Modicon TM4 - Modules d’extension, Guide de référence du matériel (Version 04)
    EcoStruxure Machine Expert Modbus TCP - User Guide (Version 00)
    EcoStruxure Machine Expert EtherNet/IP - User Guide (Version 00)
    Modicon M251 Logic Controller, Guide de référence du matériel (Version 05)
    Modicon TM4 Expansion Modules, Hardware Guide (Version 04)
    SoMachine - Altivar / PLCopen / EtherNet/IP, Example Guide (Version 00)
    Modicon M251 Logic Controller System Functions and Variables, PLCSystem Library Guide (Version 01)
    Modicon M251 Logic Controller - Fonctions et variables système, Guide de la bibliothèque PLCSystem (Version 01)
    SoMachine - Lexium / PLCopen / EtherNet/IP, Example Guide (Version 00)
    Modicon M251 Logic Controller - Hardware Guide (Version 00)
    Modicon TM4 - Expansion Modules - Programming Guide (Version 00)
    Modicon M251 Logic Controller - Programming Guide (Version 00)
    Modicon M251 Logic Controller, Guide de programmation (Version 05)
    Modicon M251 Logic Controller, Hardware Guide (Version 05)
    Modicon TM4 Expansion Modules, Programming Guide (Version 03)
    CAD
    Date
    Size
    Add to My Documents
    CAD file (on TraceParts) for TM251MESE: controller M251 2x Ethernet (Version 2.0)
    CAD for TM251MESE: controller M251 2x Ethernet (Version 1.0)
    Compact EtherNet/IP Logic Controller M251 - Wiring Diagram (Version 1.0)
    Distributed Modbus TCP Logic Controller M251 - Wiring Diagram (Version 00)
    Certificate
    Date
    Size
    Add to My Documents
    E361380-20150627-CertificateofCompliance (Version 1.0)
    UL Certificate Ordinary Location TM241 TM251 TMC4 TM3X (Version 1.0)
    UL Certificate Haz. Loc. TM251 (Version 1.0)
    Date 16/03/17
    Size 373 KB
    Instruction Sheet
    Date
    Size
    Add to My Documents
    TM251MESE / TM251MESC Logic Controller - Instruction sheet (Version 04)
    Declaration of conformity
    Date
    Size
    Add to My Documents
    Modicon DoC TM251 (Version 1.1)
    Date 27/04/16
    Size 320.9 KB
    End of Life Information
    Date
    Size
    Add to My Documents
    Modicon M251 Logic Controllers, Product End-of-Life Instructions (Version 2.0)
    EU RoHS Declaration
    Date
    Size
    Add to My Documents
    Date 17/04/19
    Size 195.3 KB
    Marine certificate
    Date
    Size
    Add to My Documents
    LR Marine Certificate Modicon TM241/251 PLCs (Version 2.0)
    ABS Marine Certificate Modicon M241 M251 PLCs (Version 1.1)
    DNV GL Type Approval TM241 TM251 (Version 1.1)
    Product Environmental Profile
    Date
    Size
    Add to My Documents
    Modicon M251 Logic Controllers, Product Environmental Profile (Version 2.0)
    REACh Declaration
    Date
    Size
    Add to My Documents
    Date 17/04/19
    Size 195.3 KB
    Firmware - Released
    Date
    Size
    Add to My Documents
    M241 M251 Firmware (Version 4.0.6.38)
    Date 06/03/19
    Size 16.9 MB
    Date 06/03/19
    Size 8.8 MB
    Date 06/03/19
    Size 5.2 MB
    Date 06/03/19
    Size 5.3 MB
    Date 06/03/19
    Size 568 KB
    M241 M251 Firmware (Version 4.0.6.39)
    Date 31/01/19
    Size 612.5 KB
    Date 31/01/19
    Size 5.3 MB
    Date 31/01/19
    Size 16.9 MB
    Date 31/01/19
    Size 8.8 MB
    Date 31/01/19
    Size 5.3 MB
    Firmware - Updates
    Date
    Size
    Add to My Documents
    Last Release Notes (Version 4.0.6.39)
    Date 14/01/19
    Size 612.5 KB
  • Technical FAQs

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  • Dimensions Drawings

    Dimensions



  • Mounting and Clearance

    Clearance



    Mounting Position


    NOTE: Keep adequate spacing for proper ventilation and to maintain an ambient temperature between -10°C (14°F) and 55°C (131°F).

    Acceptable Mounting


    NOTE: Expansion modules must be mounted above the controller.

    Incorrect Mounting



    Direct Mounting on a Panel Surface



  • Connections and Schema

    USB Connection to a PC



    Ethernet Connection to a PC