Schneider TM221C40T

1. Product Overview

The Schneider TM221C40T is an economical programmable logic controller from the Modicon M221 series, featuring transistor outputs designed for high-speed switching applications. With 40 I/O points (24 digital inputs/16 transistor outputs) and 24VDC operating voltage, this PLC is an ideal control solution for small-to-medium automation projects.

At its core is a 32-bit ARM Cortex-M3 processor delivering 0.15μs Boolean instruction execution speed, with 64KB program memory and 32KB data memory. Certified to CE, UL, cUL standards and compliant with IEC 61131-3, it supports multiple programming languages including Ladder Diagram (LD), Function Block Diagram (FBD), and Structured Text (ST).

2. Key Features

(1) Hardware Configuration

• CPU Specifications:

  • Processor: ARM Cortex-M3 32-bit RISC

  • Program memory: 64KB Flash

  • Data memory: 32KB RAM

  • Instruction speed: 0.15μs/Boolean instruction

  • RTC: Built-in (±2 minutes/month accuracy)

• I/O Configuration:

  • 24 digital inputs:

    • Type: Sink/source selectable

    • Voltage: 24VDC ±10%

    • Current: 4mA (typical)

    • Filtering: 0.1/0.3/3/15ms configurable

  • 16 transistor outputs:

    • Type: NPN open collector

    • Load voltage: 5-30VDC

    • Max current: 0.5A/point

    • Switching frequency: Up to 10kHz

• Communication:

  • 1× USB 2.0 programming port (Mini-B)

  • 1× 10/100Mbps Ethernet (Modbus TCP)

  • 1× RS-485 (Modbus RTU/ASCII)

(2) Expandability

• Max expansion modules: 8

• Supported modules:

  • Digital I/O (up to 128 points)

  • Analog I/O (12/16-bit)

  • Temperature (PT100/thermocouple)

  • Communication (IO-Link, CANopen)

(3) Software Features

• IDE: EcoStruxure Machine Expert-Basic (free)

• Supported languages:

  • Ladder Diagram (LD)

  • Function Block Diagram (FBD)

  • Structured Text (ST)

  • Instruction List (IL)

• Advanced functions:

  • PID control

  • Motion control (pulse output)

  • Data logging

  • Recipe management

(4) Industrial Reliability

• Operating temp: -20°C to +60°C

• Storage temp: -40°C to +85°C

• Humidity: 5-95% non-condensing

• Vibration: 5-57Hz/0.075mm, 57-150Hz/1g

• Shock: 15g/11ms

• Protection: IP20 (enclosure required)

• EMC: IEC 61000-4 compliant

3. Typical Applications

(1) High-Speed Switching

• Flying shear control in packaging

• Precision positioning in assembly

• Laser marking synchronization

(2) Automated Lines

• Conveyor speed control

• Sorting systems

• Robotic coordination

(3) Process Automation

• Reactor temperature control

• Liquid filling systems

• Pneumatic sequencing

(4) Equipment Control

• CNC peripheral control

• 3D printer control

• Test equipment automation

4. Why Choose Schneider TM221C40T?

(1) High-Speed Transistor Outputs

10kHz switching frequency and no mechanical wear-out surpass relay-based PLCs for frequent switching applications.

(2) Cost-Effective Performance

Competitive pricing without compromising Schneider's quality standards in its class.

(3) Scalable Architecture

8 expansion slots allow easy system upgrades from simple discrete control to complex analog processing.

(4) Robust Connectivity

Built-in Ethernet and RS-485 with industrial protocols simplify integration with HMIs, drives, and other devices.

(5) Efficient Engineering

Free EcoStruxure Machine Expert-Basic software with intuitive interface and rich library accelerates development.

(6) Industrial Durability

Wide temperature range, EMC immunity, and compact design (90×100×75mm) ensure reliable operation in harsh environments.

(7) Schneider Ecosystem

Seamless integration with Schneider drives, servos, and HMIs ensures unified technical support and service.