Schneider TM221C40R Logic Controller 40 I/O Relay

Modicon M221 TM221C40R Logic Controller – 40 I/O Relay

Product Introduction

The Schneider Electric TM221C40R belongs to the well-established Modicon M221 family of logic controllers. Designed for small to medium-scale automation tasks, this unit delivers reliable performance in a space-saving form factor. It combines digital and analog processing capabilities with robust relay output stages.

This controller operates on a 100...240 V AC supply and accepts input voltages between 85 and 264 V AC. Its onboard power supply provides 0.52 A at 5 V and 0.24 A at 24 V for expansion buses. You can connect up to 7 I/O expansion modules, making the system highly scalable for growing application needs.

Technical Specifications

The TM221C40R offers 24 discrete inputs that comply with IEC 61131-2 Type 1 standards. These inputs support both sink and source logic, providing flexibility for different sensor types. Additionally, the unit includes 2 analog inputs with a 0...10 V range and 10-bit resolution.

For output control, the controller provides 16 relay outputs, each rated for 2 A at voltages from 5...125 V DC and 5...250 V AC. The relay contacts are normally open and feature a mechanical durability exceeding 20 million cycles. Under maximum load, the switching frequency reaches 20 operations per minute.

The built-in memory includes 256 kB for user applications and data RAM, plus another 256 kB for internal variables. A flash memory backup preserves your application and data, while an optional 2 GB SD card expands storage capacity.

Processing speed is impressive for this class. Boolean instruction execution takes only 0.2 µs, and a 1K instruction task completes in 0.3 ms. The controller also supports 14 simultaneous PID regulation loops, making it suitable for process control applications.

Four fast inputs support high-speed counting up to 100 kHz in single-phase, pulse/direction, or A/B modes. The real-time clock maintains accurate time with a drift of less than 30 seconds per month at 25 °C.

Communication and Connectivity

For programming and monitoring, the TM221C40R includes a mini B USB 2.0 port. Two non-isolated serial links are available: one RS485 port and one RS232/RS485 comboport, both using RJ45 connectors. These support Modbus RTU/ASCII protocols in master or slave mode.

The USB port operates at 480 Mbit/s, while serial transmission rates range from 1.2 to 115.2 kbit/s. This connectivity suite enables easy integration with HMIs, drives, and SCADA systems.

Mechanical and Environmental Specifications

This logic controller measures 160 mm wide, 90 mm high, and 70 mm deep, weighing just 0.456 kg. It mounts on standard TH35-7.5 or TH35-15 DIN rails, or directly on a panel using an optional fixing kit.

The operating temperature range is -10...55 °C for horizontal mounting and -10...35 °C for vertical installation. Storage temperatures span from -25 to 70 °C. The unit maintains full functionality in 10...95 % relative humidity without condensation.

With an IP20 protection rating, the TM221C40R suits ordinary and hazardous locations. It carries multiple marine certifications, including ABS, LR, and DNV-GL, along with CE, CSA, and UL marks.

Immunity and Emissions Compliance

The controller meets stringent EMC standards. Electrostatic discharge immunity reaches 4 kV contact and 8 kV air per IEC 61000-4-2. Radiated field immunity is rated at 10 V/m from 80 MHz to 1 GHz.

For conducted disturbances, it withstands 10 Vrms from 0.15 to 80 MHz. Surge immunity is 2 kV common mode on AC power lines and relay outputs. Conducted emissions comply with EN/IEC 55011 Class A limits for industrial environments.

Power line microbreaks up to 10 ms do not affect operation, ensuring stable performance during momentary grid fluctuations.

Installation Guide

Proper installation ensures reliable operation. Follow these steps:

1. Mounting: Secure the controller on a DIN rail or panel using the integrated clips. Ensure adequate ventilation around the unit.

2. Wiring: Connect the 100...240 V AC supply to the 3-terminal block. Use shielded cables for fast inputs (max 10 m) and unshielded cables for digital I/O (max 30 m). For analog inputs, keep unshielded cable runs under 1 m.

3. Expansion: Attach up to 7 relay output modules to the expansion bus. Power is automatically supplied from the main unit.

4. Communication: Connect programming devices via USB or serial links. Set the transmission rate according to your network requirements.

5. Configuration: Use SoMachine software to program the controller. The software supports all object areas, including 512 %M bits, 8000 %MW words, and 255 timers/counters.

Packaging List

• TM221C40R logic controller (1 unit)

• Removable screw terminal blocks for inputs and outputs

• 3-terminal power supply connector

• 4-terminal analog input connector

• DIN rail mounting clips (pre-installed)

• Quick start guide (printed)

Shipping carriers: FedEx, UPS, DHL

Frequently Asked Questions

1. Can the TM221C40R replace an older Modicon M218 controller?
Yes, the TM221C40R offers improved performance and more I/O points. However, check your program compatibility, as some memory mapping differs.

2. What software do I need to program this Modicon M221 controller?
You need Schneider Electric SoMachine or EcoStruxure Machine Expert – Basic. Both support the full M221 series.

3. Does the TM221C40R support Ethernet communication?
No, this model does not include an Ethernet port. For Ethernet connectivity, consider the TM221C40R with a serial-to-Ethernet gateway or choose an Ethernet-equipped variant.

4. How many expansion modules can I connect to this logic controller?
The TM221C40R supports up to 7 relay output expansion modules, provided total power consumption does not exceed the built-in supply limits.

5. Is the real-time clock battery replaceable?
Yes, the BR2032 lithium battery is user-replaceable. It typically lasts 4 years and maintains the clock and data during power interruptions.