Product Overview
The Schneider TM258LF42DT is a compact logic controller from the Modicon M258 series, offering 42 integrated I/O points. Designed for efficient machine control, this controller combines a 24 V DC power supply with CANopen master connectivity. Its 42 discrete I/O include 12 outputs (4 fast) and 10 fast inputs, making it suitable for high-speed automation tasks. As part of the Schneider Electric family, the TM258LF42DT delivers robust performance in a compact footprint.
Technical Specifications
Below are key specifications of the Schneider TM258LF42DT logic controller, sourced directly from the product datasheet:
| Parameter |
Value |
| Discrete I/O count |
42 (12 outputs, 4 fast; 10 fast inputs, 12 regular inputs) |
| Supply voltage |
24 V DC (20.4...28.8 V) |
| Power consumption |
≤ 13.03 W |
| Memory |
Flash 128 MB, Internal RAM 64 MB |
| Real-time clock drift |
≤ 6 s/month (with user calibration) |
| Integrated communication |
1 CANopen master (SUB-D 9), 1 Ethernet Modbus TCP/IP, 1 serial Modbus RTU/ASCII, 1 USB |
| Dimensions (W x H x D) |
175 mm x 99 mm x 85 mm |
| Weight |
0.55 kg |
| Operating temperature |
0...60 °C (with derating) |
| IP protection |
IP20 |
Industry Applications
The Schneider TM258LF42DT excels in applications requiring precise control and communication, such as packaging machinery, material handling, and textile automation. Its 4 fast outputs and 10 fast inputs handle high-speed counting and positioning tasks with minimal latency. The CANopen interface enables seamless integration with drives and sensors, reducing wiring costs and improving system flexibility. For machine builders, this controller offers a reliable backbone for mid-range automation projects.
Installation & Setup Guidance
Mount the Schneider TM258LF42DT on a symmetrical DIN rail using the integrated clips. Ensure adequate ventilation for the 24 V DC supply. Connect the I/O according to the sink/source logic: fast inputs accept sink logic up to 5 V, while regular inputs support source logic. Maintain cable distances under 30 m for fast I/O to preserve signal integrity. The built-in power supply module handles up to 10 A for the I/O segment; verify total load current does not exceed rated peak currents.
Maintenance & Reliability
The TM258LF42DT features a real-time clock with a backup battery (CR2477M Renata) providing up to 1.5 years of data retention. To maximize ROI, inspect the controller periodically for dust accumulation and ensure ambient temperature stays within 0...60 °C. The IP20 enclosure protects against moderate contamination but requires installation in a clean panel. Environmental standards compliance (CSA, UL 508, IEC 61131-2) ensures long-term dependability in industrial settings.
Selection Guide & Purchasing Advice
Before purchasing the Schneider TM258LF42DT, verify that your system voltage matches the 24 V DC requirement and that the CANopen master configuration aligns with your slave devices. The controller supports up to 8 counting inputs at 200 kHz—ideal for encoder feedback. For a reliable supply, choose UBEST Automation as your partner. We stock genuine Schneider modules with full traceability.