TM251MESC Logic Controller – Modicon M251 with Ethernet & CANopen | Schneider

Product Overview

• TM251MESC – Modicon M251 logic controller from Schneider Electric.
• Combines Ethernet and CANopen for flexible machine control.
• Designed for compact automation tasks with high performance.

Key Features

• Controller type – Logic controller, Modicon M251 series.
• Supply voltage – 24 V DC (20.4…28.8 V range).
• I/O capacity – 7 local + 14 remote expansion modules.
• Memory – 64 MB RAM, 128 MB flash for user program backup.
• Execution speed – 0.3 ms per 1K instruction (event/periodic tasks).
• Integrated ports – USB, serial (RS232/RS485), dual Ethernet, CANopen.
• Communication – Modbus TCP, Ethernet/IP, OPC UA, web server.
• Real‑time clock – with battery backup (BR2032, 4‑year life).
• Mounting – DIN rail (TH35‑15/7.5) or panel with kit.

Technical Specifications

• Brand – Schneider Electric
• Model – TM251MESC
• Series – Modicon M251
• Type – Logic controller
• Rated supply – 24 V DC (20.4…28.8 V)
• Inrush current – 50 A
• Power consumption – 32.6…40.4 W (max I/O)
• Memory – 64 MB RAM, 128 MB flash
• Optional storage – SD card up to 16 GB
• Battery – BR2032 lithium (4 years, 2 years backup at 25°C)
• Execution time – 0.3 ms (event/periodic), 0.7 ms (other)
• Tasks – 3 cyclic master + 1 freewheeling, 8 event, 4 external
• Clock drift – ≤60 s/month at 25°C
• Integrated ports
  • USB mini B (2.0)
  • Serial RJ45 (RS232/RS485, non‑isolated)
  • Dual‑port Ethernet RJ45
  • CANopen SUB‑D 9 (J1939)
• Serial supply – 5 V, <200 mA
• Baud rates – 1.2…115.2 kbit/s (RS485 up to 15 m, RS232 up to 3 m)
• USB speed – 480 Mbit/s (up to 3 m)
• Protocols – Modbus master/slave (RTU/ASCII), SoMachine‑Network, Ethernet/IP, Modbus TCP, OPC UA, FTP, SNMP, SQL, email
• Max connections – 8 Modbus server, 8 client, 16 Ethernet/IP, 4 FTP, 10 web, 8 SoMachine
• CANopen – DS 301 V4.02, up to 63 devices
• LED indicators – PWR, RUN, ERR, I/O, SD, BAT, Ethernet activity, SL, TM4, CAN run/error
• Connection – Removable screw terminal (5.08 mm pitch)
• Insulation – Non‑insulated supply‑logic; 500 V AC supply‑ground
• Dimensions (H×D×W) – 90 × 95 × 54 mm
• Weight – 0.22 kg

Environmental & Certifications

• Operating temp – -10…55 °C (horizontal), -10…35 °C (vertical)
• Storage temp – -25…70 °C
• Humidity – 10…95 % non‑condensing
• IP rating – IP20 (with cover)
• Pollution degree – 2
• Altitude – 0…2000 m (operation), 0…3000 m (storage)
• Vibration – 3.5 mm (5…8.4 Hz), 3 gn (8.4…150 Hz) on rail/panel
• Shock – 15 gn for 11 ms
• Immunity – ESD 8 kV air / 4 kV contact; radiated 10 V/m (80‑1000 MHz); fast transients 2 kV (power), 1 kV (Ethernet/serial); surge 1 kV common, 0.5 kV differential
• Emission – Class A per CISPR11
• Microbreaks – 10 ms immunity
• Standards – IEC 61131-2, UL 508, CSA C22.2, marine (LR, ABS, DNV, GL)
• Certifications – cULus, CE, UKCA, DNV‑GL, ABS, LR

Compatibility

• I/O expansion – Up to 7 local + 14 remote modules (TM5/TM7).
• Software – SoMachine / EcoStruxure Machine Expert.
• Network – Ethernet, CANopen, Modbus.

Installation & Maintenance

• Mounting – DIN rail (TH35‑15 or TH35‑7.5) or panel (kit required).
• Wiring – Use shielded cables for serial and Ethernet.
• Battery – Replace BR2032 every 4 years.
• Firmware – Update via Ethernet or USB.

Packaging & Delivery

• Includes – 1 TM251MESC controller, terminal block, quick guide.
• Warranty – 12 months against defects.
• Shipping – 12‑24 hours via FedEx, UPS, or DHL.

Expert Review

• Manager’s Insight: “The TM251MESC is a solid choice for OEMs needing Ethernet and CAN in one compact unit. Its OPC UA and web server simplify IIoT integration, while the 0.3 ms execution keeps machines responsive.”

Applications

• Ideal for – Packaging, material handling, textile, and printing machines.
• Works with – Servo drives, HMIs, sensors, and remote I/O via CANopen or Modbus.

Comparison

• TM251MESC vs. TM241CE24R – TM251 offers more memory (64 MB vs. 32 MB) and built‑in OPC UA.
• TM251MESC vs. TM258LD42DT – TM251 is more compact and cost‑effective for standalone logic.
• TM251MESC vs. TM262M35M – TM262 adds motion control; TM251 is better for pure logic + communication.
• Compare details: Schneider M251 Series

FAQ

• Q: What is the maximum number of I/O modules?
  A: 7 local + 14 remote (total 21).
• Q: Can I use an SD card for data logging?
  A: Yes, supports up to 16 GB SD (optional).
• Q: What protocols are supported for Ethernet?
  A: Modbus TCP, Ethernet/IP, OPC UA, web server, FTP, SNMP, and SQL.
• Q: Is the serial port isolated?
  A: No, it is non‑isolated. Use proper grounding.
• Q: How do I update firmware?
  A: Via Ethernet, USB, or SD card using SoMachine.
• Q: What is the battery life?
  A: BR2032 lasts ~4 years, keeps RTC for 2 years at 25°C.
• Q: Can I mount it vertically?
  A: Yes, but derate temperature to -10…35 °C.
• Q: What is the warranty?
  A: 12 months from purchase.
• Q: How fast is delivery?
  A: 12‑24 hours via FedEx, UPS, or DHL.

Selection Guide

• Choose TM251MESC if:
  • You need Ethernet and CANopen on one controller.
  • Your application requires OPC UA or web server.
  • You need fast logic execution (0.3 ms).
• Consider other models if:
  • You need motion control (look at M262).
  • You require more I/O capacity (M258 has more).
  • You need isolated serial ports (use external converters).
• Pro tip: For mixed Ethernet/CAN networks, this controller offers the best value.

Contact Information:
Email: sales@powergearx.com
Phone/WhatsApp: +86 18030005825

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