Product Overview
The Schneider TM251MESC Logic Controller from the Modicon M251 series delivers high performance and flexibility for industrial automation. With integrated Ethernet and CANopen communication, it simplifies network integration and reduces system costs. This controller supports up to 7 local and 14 remote I/O expansion modules, making it suitable for medium-scale applications.
Technical Specifications
| Parameter |
Value |
| Rated Supply Voltage |
24 V DC |
| Supply Voltage Limits |
20.4…28.8 V |
| Inrush Current |
50 A |
| Power Consumption (max I/O) |
32.6…40.4 W |
| Memory Capacity |
64 MB system RAM (user program), 128 MB flash backup |
| Data Storage |
Up to 16 GB SD card (optional) |
| Execution Time (1 Kinstruction) |
0.3 ms event/periodic, 0.7 ms other |
| Real-Time Clock Drift |
≤ 60 s/month at 77 °F |
| Communication Ports |
USB mini B, serial RJ45 (RS232/RS485), dual Ethernet RJ45, CANopen SUB-D9 |
Communication and Integration
The TM251MESC supports multiple protocols including Modbus RTU/ASCII, Modbus TCP client/server, Ethernet/IP slave, OPC UA server, and CANopen DSS 301. This wide protocol support ensures seamless integration with existing PLCs, drives, and SCADA systems. The built-in web server enables remote monitoring and diagnostics, reducing downtime.
Application Scenarios
Ideal for packaging lines, material handling, and conveyor systems, the TM251MESC provides reliable control with fast execution. Its large memory and flexible I/O expansion reduce the need for additional hardware, lowering total cost of ownership. The controller’s ability to handle 3 cyclic master tasks and 8 event tasks optimizes machine performance.
Installation and Mounting
Mount the controller on a standard DIN rail (TH35-15 or TH35-7.5) or panel using the fixing kit. The removable screw terminal block (5.08 mm pitch) simplifies wiring. Ensure ambient temperature within -10…55 °C (horizontal) or -10…35 °C (vertical) for reliable operation.
Selection Guide
Before ordering, verify your I/O expansion requirements (up to 7 local or 14 remote) and communication needs. The TM251MESC is available from UBEST Automation, your trusted source for genuine industrial control components. We provide detailed documentation and support for integration.