TM221CE24U Logic Controller NPN Output Ethernet Schneider

TM221CE24U Modicon M221 Logic Controller

Product Introduction

The TM221CE24U expands the Modicon M221 family with a higher I/O count and NPN transistor output configuration. This controller provides 24 discrete I/O points, comprising 14 inputs and 10 transistor outputs, alongside 2 analog inputs for monitoring analog signals. Its 24 V DC power supply makes it ideal for mobile and battery-backed applications. With built-in positioning functions, high-speed counting, and PWM capabilities, the TM221CE24U excels in motion control, packaging, and material handling systems. Support for up to 7 expansion modules ensures the system grows with your application, while integrated Ethernet, USB, and serial ports provide seamless connectivity.

Technical Specifications

Power Supply and Electrical Characteristics

The TM221CE24U requires a rated supply voltage of 24 V DC, with operational limits from 20.4 to 28.8 V DC. Its inrush current reaches a maximum of 35 A. Power consumption is rated at 14 W with a full complement of expansion modules and drops to just 4.8 W without them. For expansion modules, the controller provides a 5 V output at 0.52 A and a 24 V output at 0.2 A. These built-in power capabilities simplify system wiring by reducing the need for external power supplies in many configurations.

Input Configuration

This logic controller provides 14 discrete inputs that comply with IEC 61131-2 Type 1 standards. Among these, four terminals (I0, I1, I6, I7) function as fast inputs with response times as low as 5 µs. The inputs accept 24 V DC signals and support both sink and source logic configurations. State 1 is guaranteed at ≥15 V, while state 0 is guaranteed at ≤5 V. The discrete input current is 7 mA, with fast inputs drawing 5 mA. Such precise thresholds ensure reliable signal detection even in electrically noisy industrial environments.

Analog Input Details

The TM221CE24U includes 2 analog inputs with a 0–10 V range and 10-bit resolution. Each input offers an LSB value of 10 mV and a conversion time of 1 ms per channel plus one controller cycle. The absolute accuracy error stays within ±1% of full scale. Permanent overload protection permits ±13 V DC, while temporary overloads up to ±30 V DC are acceptable for 5 minutes. The input impedance of 100 kOhm minimizes signal loading, preserving measurement accuracy for sensors and transmitters.

Transistor Output Stage (NPN)

The TM221CE24U features 10 transistor outputs arranged in NPN (negative logic/sink) configuration. Two of these outputs (Q0 and Q1) are fast outputs capable of 100 kHz operation in PWM or PLS modes. Outputs Q2 and Q3 support 5 kHz, while Q4 through Q9 operate at 0.1 kHz. Each output handles 0.5 A at 24 V DC, with a voltage drop of less than 1 V. The current per output common terminal is rated at 5 A. Unlike its PNP counterpart, the TM221CE24U does not include built-in overload or short-circuit protection, so external fusing or current-limiting measures are strongly recommended for protecting connected loads.

Positioning and Motion Control

A key strength of the TM221CE24U lies in its integrated positioning functions. It supports two axes of PTO (Pulse Train Output) in pulse/direction mode at 100 kHz, as well as one axis in CW/CCW mode at the same frequency. Additionally, the controller offers PWM (Pulse Width Modulation), PLS (Pulse), and frequency generator functions. These capabilities make the Modicon M221 controller particularly suitable for simple servo drive control, stepper motor positioning, and variable speed applications without requiring dedicated motion modules.

High-Speed Counting

Four fast inputs on the TM221CE24U operate in high-speed counter (HSC) mode at frequencies up to 100 kHz. They support single-phase, A/B, and pulse/direction control signal types, with a counting capacity of 32 bits. Whether you need to monitor encoder feedback, count high-speed product flow, or measure rotational speed, these counters deliver the performance required. Their rapid response ensures accurate data capture even in demanding production environments.

Communication and Networking

Built-in Ethernet connectivity distinguishes the TM221CE24U from simpler controllers. The RJ45 port supports 10BASE-T/100BASE-TX and provides Modbus TCP client/server, Modbus TCP slave, and Ethernet/IP adapter services. For programming and diagnostics, a mini B USB 2.0 port offers a direct connection to SoMachine Basic software. Moreover, a non-isolated serial link with RS232/RS485 interfaces supports Modbus RTU/ASCII protocols, enabling communication with legacy devices. This combination of ports ensures the TM221CE24U integrates easily into both new and existing architectures.

Memory and Processing Power

The controller houses 256 kB of RAM for user applications and data, plus another 256 kB for internal variables. An additional 256 kB of built-in flash memory backs up your application and key data. The real-time clock maintains accurate time with a monthly drift of ≤30 seconds at 25 °C, and the BR2032 lithium battery preserves settings during power outages for up to one year. Execution of 1,000 instructions takes only 0.3 ms, while Boolean instructions execute in 0.2 µs, ensuring responsive control even in complex logic sequences.

Regulation and Control Functions

The TM221CE24U includes an adjustable PID regulator capable of handling up to 14 simultaneous loops. This built-in regulation function is ideal for temperature, pressure, flow, and level control applications, eliminating the need for external PID controllers in many cases. The real-time clock supports time-based control strategies, scheduled operations, and data logging with accurate time-stamping. Together, these features make the controller a comprehensive solution for process and discrete manufacturing applications alike.

Expansion and Scalability

A significant advantage of the TM221CE24U is its expandability. It supports up to 7 I/O expansion modules, which can be either transistor or relay output types. This allows you to tailor the system precisely to your application needs, whether you require additional digital inputs, more transistor outputs, or specialized analog modules. The expansion bus draws power directly from the controller, simplifying installation and reducing external power supply requirements. With this flexibility, the Modicon M221 controller grows alongside your automation requirements.

Mechanical and Environmental Specifications

Mounting and Dimensions

The TM221CE24U measures 110 mm in width, 90 mm in height, and 70 mm in depth. It mounts on a top hat TH35-7.5/15 rail per IEC 60715, or on a panel using the optional fixing kit. The product weight is 0.57 kg, which is slightly heavier than other models in the series due to its NPN output stage configuration. The removable screw terminal blocks for both inputs and outputs simplify wiring, maintenance, and future reconfiguration. The compact width allows efficient use of cabinet space.

Operating Conditions

For horizontal installation, the ambient temperature range spans -10 to 55 °C, while vertical mounting supports -10 to 35 °C. Storage temperatures may range from -25 to 70 °C. Relative humidity between 10 and 95% (non-condensing) is acceptable in both operation and storage. With the protective cover fitted, the TM221CE24U achieves an IP20 protection rating, guarding against solid objects larger than 12.5 mm. The pollution degree is rated ≤2, making it suitable for most industrial environments.

Mechanical Robustness

Vibration resistance is rated at 3.5 mm from 5 to 8.4 Hz and 1 gn from 8.4 to 150 Hz on both rail and panel mounting. Shock resistance reaches 147 m/s² with an 11 ms test wave duration. Such robust mechanical properties ensure the TM221CE24U maintains reliable operation in applications subject to continuous machinery vibration or occasional impacts. Equipment like presses, conveyors, and packaging lines benefit from this durability.

Electromagnetic Compatibility

The TM221CE24U exhibits strong immunity to electromagnetic disturbances. It withstands electrostatic discharge of 4 kV contact and 8 kV air, radiated fields up to 10 V/m, and fast transients of 2 kV on power lines. Surge immunity includes 2 kV common mode on AC power lines and 0.5 kV differential mode on DC lines. Conducted and radiated emissions meet EN/IEC 55011 Class A limits. Marine certifications from LR, ABS, DNV, and GL further confirm its suitability for shipboard and offshore applications.

Insulation and Safety

Insulation ratings for the TM221CE24U include 500 V AC between fast inputs and internal logic, 500 V AC between outputs and internal logic, and 500 V AC between inputs and internal logic. Analogue inputs are non-insulated from each other and from internal logic. The controller complies with EN/IEC 61010-2-201, EN/IEC 60664-1, and EN/IEC 61131-2 standards. Certifications include RCM, CSA, cULus, IACS E10, ABS, LR, DNV-GL, and EAC. As a Green Premium product, it also meets RoHS and REACH compliance requirements.

Installation Guidelines

Proper installation of the TM221CE24U ensures optimal performance and longevity. Begin by mounting the controller securely on a DIN rail or panel, ensuring adequate clearance for ventilation and cable access. Connect the 24 V DC power supply to the 3-terminal block, observing correct polarity and voltage limits. The removable terminal blocks for I/O simplify wiring: use shielded cables for fast inputs (up to 10 meters) and fast outputs (up to 3 meters) to minimize electrical noise. Unshielded cables work well for standard digital inputs and outputs up to 30 meters. For analog inputs, keep unshielded cable length to 1 meter or use shielded cable for longer runs. Connect the Ethernet cable to the RJ45 port and, if needed, the USB cable for programming. Always terminate unused wires properly and secure all connections to avoid intermittent faults.

Packaging List

• 1 x TM221CE24U Modicon M221 logic controller

• 1 x Removable screw terminal block for inputs

• 1 x Removable screw terminal block for outputs

• 1 x Mini B USB 2.0 programming cable (length varies)

• 1 x Mounting clip for DIN rail

• 1 x Quick start guide (multi-language)

• 1 x Product label with serial number

Shipping: FedEx, UPS, DHL

Frequently Asked Questions

1. What software do I need to program the TM221CE24U?
The TM221CE24U is programmed using Schneider Electric's SoMachine Basic software. This free tool supports ladder logic, instruction list, and structured text, making it accessible for programmers of all skill levels.

2. What is the main difference between the TM221CE24U and the TM221CE24T?
The TM221CE24U uses NPN (sink) transistor outputs, while the TM221CE24T uses PNP (source) outputs. Additionally, the TM221CE24U does not include built-in overload or short-circuit protection on its outputs, so external protection is required for high-current or inductive loads.

3. Can the TM221CE24U control stepper or servo motors directly?
Yes. The TM221CE24U includes two fast outputs (Q0, Q1) that support PTO in pulse/direction or CW/CCW mode at 100 kHz. This allows direct connection to many stepper drives and servo amplifiers.

4. Does the TM221CE24U support Ethernet/IP communication?
Absolutely. The built-in Ethernet port supports Ethernet/IP adapter functionality, enabling the Modicon M221 to communicate with Rockwell Automation and other Ethernet/IP-compatible devices seamlessly.

5. Does the TM221CE24U include output protection?
No. Unlike the PNP version (TM221CE24T), the TM221CE24U does not have built-in overload or short-circuit protection. For safety and reliability, we strongly recommend using external fuses, circuit breakers, or current-limiting devices for each output channel, especially when driving inductive or high-current loads.