Modicon M251 Logic Controller 2 x Ethernet

The Modicon M251 Logic Controller with 2 Ethernet ports from Schneider Electric is designed to maximize efficiency in automated control systems, providing powerful communication, expansion, and data management capabilities. Ideal for industrial applications and machine automation, this controller offers flexibility and advanced performance, allowing the connection and management of up to 7 local expansion modules and 14 remote I/O modules.

Technical specifications:

• Product range: Modicon M251
• Product type: Programmable logic controller (PLC)
• Power supply voltage: 24 V DC (operating range of 20.4 to 28.8 V)
• Power consumption: 32.6 W to 40.4 W
• Memory capacity:
  • 64 MB of RAM for the system
  • 128 MB of integrated flash memory for user program backup
  • Support for SD card (optional) with a capacity of up to 32 GB
• Battery: BR2032 non-rechargeable lithium battery with a lifespan of 4 years
• Backup time: 2 years of backup time at 25°C
• Connections:
  • 2 Ethernet RJ45 ports (10/100 BASE-T)
  • 1 USB 2.0 port (with mini B connector)
  • 1 RS232/RS485 serial port (with RJ45 connector)
  • SD card slot

The Modicon M251 stands out for its ability to manage large volumes of data through its Ethernet ports, facilitating communication with other control devices and external systems. It is ideal for applications that require decentralized control, as it can manage up to 14 remote I/O modules, allowing system expansion without compromising efficiency.

Advanced functions:

• Integrated web server: Allows remote monitoring and control of the system via a web browser.
• FTP server: Facilitates file transfer and data exchange with other devices or servers.
• Modbus TCP client and server: Enables integration into industrial networks based on the Modbus protocol for communication with other devices.
• OPC UA support: Provides connectivity with OPC-based software systems, enhancing interoperability.
• SMS and email notifications: Allows sending alerts or notifications based on system events.

Additional specifications:

• Number of cyclic tasks: Up to 4 master cyclic tasks, 8 event-based tasks, and 1 free cycle task.
• Clock accuracy: Maximum deviation of 60 seconds per month at 25°C.
• Transmission speed:
  • USB: Up to 480 Mbit/s
  • RS232/RS485: From 1.2 to 115.2 kbit/s
• Surge resistance: Up to 1 kV in common mode and 0.5 kV in differential mode.

Installation and compatibility:

The Modicon M251 is easily mounted on DIN rail with support for TH35-15 and TH35-7.5 rails, facilitating installation in industrial electrical panels. Its compact design, with a width of only 54 mm, allows integration into tight spaces without sacrificing capacity or performance.

Applications:

This logic controller is ideal for a variety of industrial applications, including:

• Machine and process automation: Perfect for controlling complex systems in factories, production lines, or transport systems.
• Building management: Controls HVAC systems, lighting, and other automated devices in commercial and industrial buildings.
• Remote monitoring systems: Its ability to connect to Ethernet networks and its integrated web server allow for remote monitoring and control, ideal for remote control applications.

Additional advantages:

• Expansion capability: Supports up to 7 local modules and 14 remote modules, allowing great flexibility in the design of automated systems.
• Robustness and durability: With an IP20 rating, it is ideal for industrial environments and offers basic protection against accidental contact.
• High communication capacity: The 2 Ethernet ports provide fast data transfer, essential for real-time applications.

Dimensions and weight:

• Height: 90 mm
• Depth: 95 mm
• Width: 54 mm
• Weight: 0.22 kg

The Modicon M251 2 x Ethernet Logic Controller from Schneider Electric is an advanced solution for industrial automation, with powerful expansion capabilities, fast communication, and various advanced control and monitoring functions. Its compact design and easy installation make it an ideal choice for projects that require high performance, flexibility, and connectivity in industrial networks. With support for multiple communication protocols, web and FTP server functions, and the ability to control up to 14 remote modules, this controller is an efficient and reliable tool for managing complex automated systems.