TM258LF66DT4L | Schneider Electric 66 I/O Logic Controller

Product Overview: TM258LF66DT4L Compact Logic Controller

The Schneider Electric TM258LF66DT4L is a compact logic controller from the Modicon M258 series. It integrates 66 I/O points with four analog inputs and transistor outputs on a 24 VDC supply. Consequently, this controller suits machine builders who need a dense, self-powered control platform without a backplane bus.

Because the unit runs on a dual-core ARM Cortex-A8 processor, Core1 handles program tasks while Core2 manages communication tasks. This separation keeps scan performance predictable under network load. The controller executes Boolean instructions in 0.022 µs, exceeding 45,000 Boolean instructions per millisecond.

TM258LF66DT4L Key Specifications

• Supply voltage: 24 V DC (19.2...28.8 V)
• Digital inputs: 42 (34 regular 24 Vdc + 8 fast HSC 100 kHz)
• Digital outputs: 24 transistor, source/PNP, 0.5 A per point
• Analog inputs: 4 (0-10 Vdc / 4-20 mA, 12-bit)
• High-speed counters: 8 × 100 kHz
• Program memory: 128 K instructions
• Data memory: 64 MB RAM; 128 MB Flash
• Protection rating: IP20
• Dimensions (H×W×D): 99 × 265 × 75 mm
• Weight: 0.8 kg

The 24 VDC supply range of 19.2 to 28.8 V provides tolerance for industrial power rails. Meanwhile, the 18.11 W power consumption supports thermal planning in sealed enclosures. The transistor outputs switch at 0.5 A per point, and four fast reflex outputs handle time-critical actuation.

Evaluating the TM258LF66DT4L for Your Application

First, confirm your I/O count. With 42 digital inputs and 24 digital outputs, the TM258LF66DT4L fits mid-size machines directly. If your design needs more points, the controller accepts up to 7 TM5/TM2 expansion modules, reaching a maximum of 2400 I/O.

Second, review analog needs. The four analog inputs accept 0-10 Vdc or 4-20 mA signals at 12-bit resolution. However, the controller provides no analog outputs, so analog actuation requires external hardware.

Third, assess motion and counting. Eight high-speed counters at 100 kHz support encoder feedback and fast event capture. In addition, four fast reflex outputs enable rapid response independent of scan time.

Communication and Integration

The TM258LF66DT4L includes one Ethernet RJ45 port, one CANopen SUB-D9 port, one RS-485 serial link, and one USB-B mini programming port. Built-in protocols cover Modbus TCP over Ethernet, CANopen master, and Modbus RTU/ASCII over serial.

Two free PCI slots accept optional communication or function modules. This architecture lets you extend connectivity without sacrificing I/O expansion capacity. Programming uses SoMachine or EcoStruxure Machine Expert software.

Environmental and Mounting Considerations

The controller operates from 0 to +55 °C, and up to +60 °C with derating. Storage tolerance spans -25 to +70 °C. Relative humidity of 10 to 95 percent, non-condensing, suits most plant environments. The IP20 rating requires installation inside a protective cabinet.

At 99 × 265 × 75 mm and 0.8 kg, the wider body accommodates the 66 I/O density. Verify cabinet depth and DIN rail clearance before installation.