Introduction
The Schneider TM258LD42DT Logic Controller is a high-performance programmable logic controller (PLC) from the Modicon M258 series, designed for advanced automation systems where responsiveness, flexible connectivity, and robust I/O handling are essential. Built around Schneider Electric’s TM5 architecture, this controller combines powerful processing, a rich set of communications, and expandable I/O — making it a versatile choice for machine builders and industrial control applications.
Ideal for mid-to-large automation tasks, the TM258LD42DT delivers fast execution, effective data management, and multi-network support in a compact DIN-rail mount format. Its rugged design and industrial compliance ensure reliable long-term performance.
Technical Specifications
| Specification | Details |
|---|
| Model Number | TM258LD42DT |
| Product Type | Logic Controller (PLC) |
| Family | Modicon M258 |
| Discrete I/O Count | 42 (including fast and standard digital) |
| Discrete Inputs | 10 fast + 12 regular + 4 additional input channels |
| Discrete Outputs | 4 fast outputs + 12 standard outputs |
| Input Voltage | 24 V DC |
| Output Voltage | 19.2 – 28.8 V DC |
| CPU Speed | ~22 ns per instruction |
| Memory | 128 MB Flash + 64 MB RAM |
| Communication Ports | 1 × Ethernet, 1 × RS232/485, 1 × USB Mini-B, 1 × USB-A, 1 × CANopen |
| Counting Inputs | 8 @ 200 kHz |
| Mounting | DIN-rail mount with locking lever |
| Protection Rating | IP20 |
| Dimensions (W × D × H) | 175 mm × 85 mm × 99 mm |
| Weight | Approx. 0.5 kg |
| Certifications | CE, cULus, CSA, C-Tick, GOST-R |
| Operating Temp. | 0°C to 60°C (derated) |
| Storage Temp. | -25°C to 70°C |
| Humidity | 5–95% non-condensing |
Applications
The TM258LD42DT is ideal for industrial applications requiring high reliability and flexible logic control:
-
Machine control in automated manufacturing and packaging
-
Conveyor and material handling systems
-
Remote equipment monitoring and local PLC logic execution
-
Flexible automation tasks with high I/O counts
-
Integration with Modbus and Ethernet-based supervisory systems
Its balanced I/O architecture and built-in communications make it suitable for both standalone PLC tasks and coordinated networked control.
Applications
The TM258LD42DT is ideal for industrial applications requiring high reliability and flexible logic control:
-
Machine control in automated manufacturing and packaging
-
Conveyor and material handling systems
-
Remote equipment monitoring and local PLC logic execution
-
Flexible automation tasks with high I/O counts
-
Integration with Modbus and Ethernet-based supervisory systems
Its balanced I/O architecture and built-in communications make it suitable for both standalone PLC tasks and coordinated networked control.
Technical FAQs
1. What is the TM258LD42DT used for?
It serves as a compact yet powerful PLC for logic control in industrial automation.
2. How many I/O points does it support?
42 discrete I/O points with a mix of fast inputs/outputs and standard channels.
3. What communication ports are available?
Ethernet, RS232/485, USB-A, USB Mini-B, and CANopen interfaces.
4. What voltage does the controller operate on?
The controller uses 24 V DC I/O and supply voltage.
5. Is it suitable for high-speed counting?
Yes, it includes 8 counting inputs capable of up to 200 kHz.
6. What certifications does it have?
Includes CE, cULus, CSA, C-Tick, and GOST-R compliance.
7. How is the controller mounted?
It mounts on a symmetrical DIN rail using a locking lever system.
8. What type of environments can it operate in?
Designed for industrial conditions with IP20 protection and broad temperature/humidity tolerance.
9. Does it support in-system memory retention?
Yes, retained variables support persistent memory for up to ~1.5 years without power.
10. Can the I/O be expanded?
Yes, TM5 expansion modules can be integrated for additional I/O and capabilities.
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