TM258LD42DT4L

Configured for machine logic, discrete I/O processing, analog signal acquisition, and network communication in the Modicon M258 platform, the Schneider Electric TM258LD42DT4L (TM258LD42DT4L Logic Controller) provides 24 VDC control with 42 discrete I/O, 4 analog inputs, Ethernet, CANopen, serial communication, USB interfaces, and 2 free PCI slots. The controller uses a 22 ns/instruction CPU and supports TM5 expansion modules.

Hardware Specifications

Parameter	Specification
Model	TM258LD42DT4L
Brand	Schneider Electric
Product Series	Modicon M258
Product Type	Logic Controller
Origin	AT
Discrete I/O	42
Analog Inputs	4
Discrete Outputs	12, including 4 fast outputs
Fast Inputs	10
Regular Inputs	12
Input Logic	Sink fast/regular inputs; source logic inputs
Analog Input Signals	0-20 mA, 4-20 mA, +/-10 V
Analog Input Resolution	12 bits
Counting Inputs	8 at 200 kHz
Discrete Output Logic	Source
Main Supply	24 VDC
Supply Voltage Range	20.4-28.8 VDC
Power Consumption	14.14 W
CPU Performance	22 ns/instruction
Flash Memory	128 MB
Internal RAM	64 MB
Serial Communication	RS232/RS485, Modbus RTU/ASCII, 300-115200 bps
Ethernet	10BASE-T/100BASE-TX, Modbus TCP/IP
USB Interfaces	1 Mini-B, 1 Type A, 480 Mbit/s
CANopen	1 CANopen port
PCI Slots	2 free slots
Channel-to-Logic Isolation	500 Vrms AC
Channel-to-Channel Isolation	None
Protection Rating	IP20
Mounting	Symmetrical DIN rail
Dimensions	237.5 mm W x 85 mm D x 99 mm H
Weight	0.77 kg
Operating Temp	0-55 deg C without derating, horizontal; 0-60 deg C with derating, horizontal; 0-50 deg C vertical
Storage Temp	-25 to 70 deg C
Relative Humidity	5-95%, non-condensing
Standards	IEC 61131-2, CSA C22.2 No 213, CSA C22.2 No 142, UL 508
Certifications	cULus, CSA, GOST-R, C-Tick
Lifecycle Status	Discontinued June 30, 2026; end-of-service June 30, 2031
Replacement Range	Modicon M262 Logic/Motion Controller

PLC Communication and I/O Architecture

The TM258LD42DT4L combines local logic processing with multiple communication interfaces. The isolated serial interface supports RS232 or RS485 operation and Modbus RTU/ASCII communication. The Ethernet interface supports 10BASE-T/100BASE-TX and Modbus TCP/IP. A CANopen interface provides machine network connectivity.

The controller provides 42 discrete I/O and 4 analog inputs. Analog channels accept 0-20 mA, 4-20 mA, or +/-10 V signals with 12-bit resolution. Eight counting inputs support operation up to 200 kHz. Configurable input and output filtering includes 0 ms, 1.5 ms, 4 ms, and 12 ms settings, while fast I/O supports configurable anti-bounce filtering from 2 us to 4 ms.

The M258 architecture supports Modicon TM5 expansion modules for additional digital, analog, safety, and expert I/O. Removable terminal blocks use locking levers, and the controller mounts directly on symmetrical DIN rail.

Frequently Asked Questions

Q: What supply voltage does the TM258LD42DT4L require?
A: The controller uses a 24 VDC supply, with a specified supply range of 20.4-28.8 VDC. Its listed power consumption is 14.14 W.

Q: Are the I/O channels isolated from each other?
A: The specified isolation between the I/O channels and internal logic is 500 Vrms AC. There is no isolation between individual channels.

Q: What communication interfaces are integrated?
A: The controller provides RS232/RS485 serial communication, 10BASE-T/100BASE-TX Ethernet, CANopen, USB Mini-B, and USB Type A interfaces, plus 2 free PCI slots.

Field Installation Guidelines

• Mount the controller on a symmetrical DIN rail using the integrated locking lever and verify mechanical engagement before wiring.
• Maintain separation between 24 VDC control wiring, analog signal wiring, communication cables, and high-energy power conductors to reduce conducted and radiated interference.
• Route analog 0-20 mA, 4-20 mA, and +/-10 V signal wiring separately from switching and power circuits where practical.
• Connect cable shields according to the machine electrical design and applicable EMC requirements. Avoid uncontrolled shield connections that can create ground-current paths.
• Verify the 20.4-28.8 VDC supply range at the controller terminals under operating load.
• Observe the specified 30 m maximum cable distance for the listed fast and regular I/O connections.
• Use the removable terminal blocks and locking mechanisms to prevent connector movement during machine operation.
• Check the installed firmware and application software compatibility before commissioning or replacing an existing M258 controller.
• TM258LD42DT4L was discontinued on June 30, 2026 and is scheduled for end-of-service on June 30, 2031. Schneider Electric identifies the Modicon M262 Logic/Motion Controller range as the replacement range.
• The controller is IP20 rated and is intended for installation inside an enclosure providing the required environmental and mechanical protection.

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