Schneider TM258LF42DT Compact Base M258: Technical Overview
The Schneider TM258LF42DT is a compact logic controller from the Modicon M258 series, designed for high-performance industrial automation. This module integrates 42 discrete I/O points, including fast inputs and outputs, making it suitable for applications requiring precise timing and rapid response. Engineers can leverage its CANopen master capability to build flexible, distributed control systems.
Key Technical Specifications
The TM258LF42DT operates on a 24 V DC supply with a voltage range of 20.4 to 28.8 V DC. It features 14 discrete inputs (10 fast, 4 regular) and 16 discrete outputs (12 standard, 4 fast). Fast inputs and outputs support configurable filtering times (0 ms, 1.5 ms, 4 ms, 12 ms) and anti-bounce filtering from 2 µs to 4 ms. This allows engineers to tailor the module to specific sensor and actuator requirements.
The controller includes a real-time clock with drift as low as 6 seconds per month (with user calibration) and retains data via a CR2477M battery for up to 1.5 years. Memory comprises 128 MB Flash and 64 MB internal RAM, with a Boolean execution time of 22 ns. These specs ensure reliable operation in time-critical processes.
Connectivity and Communication
Integrated connections include a CANopen master port (SUB-D 9) supporting multiple baud rates (10 kbit/s to 1 Mbit/s) across varying cable lengths. Additionally, it offers one isolated serial link for Ethernet Modbus TCP/IP (10BASE-T/100BASE-TX) and one for Modbus RTU/ASCII (RS232/RS485). Two USB ports (mini B and type A) enable programming and data exchange. This versatility makes the TM258LF42DT a central node in mixed-protocol environments.
Counting and Fast I/O Capabilities
The module provides 8 counting inputs at 200 kHz, ideal for encoders or high-speed counters. Fast discrete inputs and outputs support up to 30-meter cable distances, with isolation of 500 Vrms AC between channels and internal logic. Engineers can implement precise motion control or monitoring without external high-speed modules.
Environmental and Compliance
The TM258LF42DT operates from 0 to 60 °C (with derating) in horizontal installations and 0 to 50 °C vertically. It meets IP20 protection (IEC 61131-2) and pollution degree 2. Vibration resistance up to 1 gn (8.4 to 150 Hz) and shock resistance of 15 gn ensure robustness in harsh industrial settings. The module carries CSA, cULus, C-Tick, and GOST-R certifications, simplifying global deployment.
For engineers seeking a compact, feature-rich controller with CANopen and fast I/O, the Schneider TM258LF42DT delivers reliable performance and seamless integration into Modicon M258 ecosystems. Its combination of memory, connectivity, and real-time capabilities supports efficient automation solutions.