Schneider TM258LF42DT

Product Overview

The Schneider Electric TM258LF42DT is a robust and high-performance programmable logic controller (PLC) designed for demanding industrial and machine automation applications. As part of the Modicon M258 range, this controller offers fast processing speed, extensive communication options, and flexible I/O capabilities, all packaged in a compact DIN-rail-mountable format. It is especially suited for standalone machines or machines integrated into larger production systems requiring speed, accuracy, and reliability.

The TM258LF42DT controller is powered by 24 VDC and comes equipped with 26 digital inputs and 16 digital transistor outputs, for a total of 42 discrete I/O points. This combination of input/output capacity, along with multiple communication interfaces, makes it an ideal control solution for medium to complex machine automation.

Key Features

1. High-Speed Processing

• The controller operates with an execution speed of 22 nanoseconds per Boolean instruction, offering more than 45,000 instructions per millisecond. This ensures rapid response times for high-performance machine control.

2. Digital I/O Configuration

• The TM258LF42DT is equipped with 42 discrete I/O channels:

  • 26 digital inputs (24V DC)

  • 16 transistor outputs (sourcing type, suitable for fast-switching actuators)

3. Integrated Communication Interfaces

• 1 Ethernet Port (RJ45) for remote communication, programming, and Modbus TCP/IP.

• 1 USB Mini-B Programming Port for connection to engineering software.

• 1 USB Type A Host Port for data logging or USB peripheral support.

• 1 RS232/RS485 Serial Port supporting Modbus RTU master/slave protocols.

• 1 CANopen Master Port for field device integration and motion applications.

4. Memory and Data Handling

• 64 MB of RAM for application execution and data processing.

• 128 MB of Flash memory to store application code, settings, and retain data across power cycles.

5. Motion and Axis Control

• Built-in motion control capabilities using standardized PLCopen function blocks.

• Supports pulse train outputs for stepper or servo drives.

• Eight embedded high-speed counters (up to 100 kHz) and four reflex outputs allow real-time event-based control, suitable for tasks like positioning or speed feedback loops.

6. Programming Flexibility

• Compatible with EcoStruxure Machine Expert (formerly SoMachine), offering graphical and textual programming languages compliant with IEC 61131-3 (LD, ST, FBD, SFC, IL, CFC).

• Easy integration with other Schneider Electric automation components including HMI (Magelis), drives (Altivar), and motor starters (TeSys).

7. Expansion Capability

• The controller supports local and remote expansion modules, scalable up to 2,400 I/O points, allowing future-proof design as machine complexity grows.

8. Compact and Durable Design

• DIN-rail mountable housing suitable for panel installation.

• Removable terminal blocks with spring connections for fast installation and maintenance.

• Designed to operate in industrial environments with high reliability and minimal downtime.

Applications

The TM258LF42DT is designed for machine-level automation and is ideal for:

• Packaging Equipment: Offers the speed and flexibility required for high-throughput packaging operations, including labeling, wrapping, and filling.

• Material Handling Systems: Controls conveyors, sorters, and transfer lines in warehouse or production environments.

• Woodworking and Textile Machinery: Capable of precise sequencing and speed control, it enables optimized processing in machines such as looms, cutters, and routers.

• Hoisting and Lifting Systems: Manages cranes, elevators, and automated lifts with built-in motion and safety features.

• Bottling and Food Processing Lines: Handles synchronized processes where multiple subsystems (temperature, flow, positioning) must operate in coordination.

• Automated Storage and Retrieval Systems (AS/RS): Coordinates shuttle systems, rack-and-pinion mechanisms, and barcode scanning systems in logistics operations.

Why Choose the Schneider TM258LF42DT

1. Speed and Performance

• The TM258 offers one of the fastest cycle times in its class, making it suitable for time-critical applications such as motion control and synchronized machine sequences.

2. Versatile Communication

• With built-in Ethernet, serial, USB, and CANopen interfaces, the controller can easily communicate with a broad array of industrial devices, sensors, and actuators, minimizing the need for additional gateways or modules.

3. Cost-Effective Integration

• By incorporating advanced functions like motion control, high-speed counters, and data logging without requiring additional modules, the TM258 reduces overall hardware costs and system complexity.

4. Scalability and Future Expansion

• Its ability to expand I/O counts and communication interfaces ensures that a machine designed with the TM258 today can adapt to new requirements or increased production demands in the future.

5. Simplified Engineering

• Schneider Electric's EcoStruxure Machine Expert platform shortens development time through reusable code libraries, simulation tools, and intuitive programming environments.

6. Proven Industrial Reliability

• Designed for rugged environments and 24/7 operation, this controller has been deployed in thousands of machines worldwide, earning a reputation for reliability and support.

7. Seamless Ecosystem Compatibility

• The TM258 works natively within Schneider Electric’s automation ecosystem, enabling tight integration with variable speed drives, servo systems, HMIs, safety modules, and cloud-based monitoring platforms.

Conclusion

The Schneider Electric TM258LF42DT logic controller is a highly capable and reliable PLC tailored for machine builders, OEMs, and industrial automation professionals. It delivers excellent performance in processing speed, communication flexibility, and motion control while providing the scalability and durability required in modern industrial environments. Whether deployed in packaging, material handling, or precision machinery, the TM258 is engineered to deliver high productivity, efficient integration, and long-term operational value.