TM221C40T Schneider Electric Modicon M221 Transistor Controller – 40 I/O, 24 V DC, Fast PNP Outputs

The TM221C40T is a Modicon M221 logic controller from Schneider Electric. It runs on 24 V DC and offers 40 discrete I/O points. Sixteen transistor PNP outputs switch fast, and 24 inputs handle daily machine signals. Two analog inputs add simple voltage measurement. Engineers pick the TM221C40T for compact panels that need speed, PWM, and positioning.

Summary

• The TM221C40T packs 24 inputs, 16 transistor outputs, and 2 analog inputs.
• Fast outputs Q0 and Q1 reach 100 kHz for PWM and pulse tasks.
• Four high-speed counters run at 100 kHz with 32-bit range.
• Two PTO axes support pulse/direction mode for simple positioning.
• The 24 V DC supply keeps wiring simple in modern control cabinets.

Top Selling Points

• Fast switching: Q0 and Q1 respond in 5 µs for precise pulse work.
• Built-in analog: Two 0…10 V inputs save the cost of extra modules.
• Strong expansion: Add up to 7 expansion modules for relay outputs.
• Real clock inside: The built-in RTC drifts only 30 s per month.
• Green Premium: The product meets RoHS and REACh rules.

Core Technical Specifications

• Brand: Schneider Electric
• Model: TM221C40T
• Range: Modicon M221
• Product type: Logic controller
• Rated supply voltage: 24 V DC
• Supply voltage limits: 20.4…28.8 V
• Inrush current: ≤ 35 A
• Power consumption: ≤ 4.1 W without expansion; ≤ 16 W with maximum expansion
• Discrete I/O number: 40 total (24 inputs, 16 transistor outputs)
• Discrete input voltage: 24 V DC, sink or source per IEC 61131-2 Type 1
• Discrete input current: 7 mA standard; 5 mA fast input
• Input impedance: 3.4 kOhm standard; 4.9 kOhm fast input
• Logic thresholds: State 1 ≥ 15 V; State 0 ≤ 5 V
• Fast input response: 5 µs turn-on and turn-off on I0, I1, I6, I7
• Standard input response: 35 µs turn-on; 100 µs turn-off
• Configurable filtering: 0 ms, 3 ms, or 12 ms per input
• Analog input number: 2 channels, range 0…10 V
• Analog resolution: 10 bits with 10 mV LSB value
• Analog accuracy: ±1 % of full scale
• Analog conversion time: 1 ms per channel plus one controller cycle
• Analog overload: ±13 V DC permanent; ±30 V DC for 5 minutes
• Analog input impedance: 100 kOhm
• Transistor output voltage: 24 V DC, positive logic (source)
• Transistor output current: 0.5 A per output
• Current per output common: 4 A
• Output frequency: 100 kHz on Q0/Q1; 5 kHz on Q2/Q3; 0.1 kHz on Q4…Q15
• Leakage current: 0.1 mA
• Voltage drop: ≤ 1 V
• Protection: Overload and short-circuit protection at 1 A with 1 s auto reset
• Tungsten load: ≤ 12 W per output
• Mechanical durability: ≥ 20,000,000 cycles

Memory, Processing, and Control Functions

• User application and data RAM hold 256 kB with 10,000 instructions.
• Internal variables use another 256 kB of RAM.
• A 256 kB built-in flash memory backs up the application and data.
• An optional 2 GB SD card stores larger projects and logs.
• A BR2032 lithium battery keeps data alive for 1 year at 25 °C.
• Boolean instructions execute in 0.2 µs.
• Each 1 K instruction block needs 0.3 ms for event and periodic tasks.
• Event task response time reaches 60 µs.
• Memory areas include 512 %M bits, 8000 %MW words, and 512 %KW words.
• Timer and counter areas each hold 255 entries.
• The PID regulator handles up to 14 simultaneous loops.
• Positioning runs two PTO axes in pulse/direction mode at 100 kHz.
• One PTO axis runs in CW/CCW mode at 100 kHz.
• PWM, PLS, and frequency generator functions come built in.
• Four HSC inputs count at 100 kHz with 32-bit capacity.
• HSC signal types cover A/B, pulse/direction, and single phase.

Communication Interfaces

• A USB mini B 2.0 port supports SoMachine-Network programming at 480 Mbit/s.
• Serial link 1 uses an RJ45 connector with RS485 interface.
• Serial link 2 uses an RJ45 connector with RS232/RS485 interface.
• Both serial ports run Modbus master/slave in RTU or ASCII mode.
• Baud rates range from 1.2 to 115.2 kbit/s with 115.2 kbit/s as default.
• RS485 bus length reaches 15 m; RS232 bus length reaches 3 m.
• Each serial link supplies 5 V at 200 mA to external devices.
• Status LEDs cover ERR, PWR, RUN, SD, BAT, SL1, SL2, and per-channel I/O.

Environment, Immunity, and Operating Limits

• Operating temperature reaches -10…55 °C for horizontal mounting.
• Vertical mounting limits operation to -10…35 °C.
• Storage temperature spans -25…70 °C.
• Relative humidity stays at 10…95 % without condensation.
• ESD immunity reaches 8 kV air and 4 kV contact per EN/IEC 61000-4-2.
• Radiated field immunity reaches 10 V/m from 80 MHz to 1 GHz.
• Higher bands reach 3 V/m from 1.4 to 2 GHz and 1 V/m from 2 to 2.7 GHz.
• Magnetic field immunity reaches 30 A/m at 50/60 Hz.
• Fast transient immunity reaches 2 kV on power lines and 1 kV on I/O.
• Surge immunity reaches 2 kV common mode on AC power lines.
• Conducted RF immunity reaches 10 Vrms from 0.15 to 80 MHz.
• Marine-grade immunity meets LR, ABS, DNV, and GL rules.
• Microbreak immunity reaches 10 ms.
• Shock resistance reaches 147 m/s² for 11 ms.
• Vibration resistance reaches 3.5 mm at 5…8.4 Hz and 1 gn at 8.4…150 Hz.
• Pollution degree stays at 2 or lower; operating altitude reaches 2000 m.
• Protection degree is IP20 with the cover in place.

Mechanical Data and Installation Guide

• Dimensions measure 160 mm wide, 90 mm high, and 70 mm deep.
• Product weight is 0.456 kg.
• Mount the unit on a TH35-15 or TH35-7.5 top hat rail per IEC 60715.
• Alternatively fix the unit to a plate or panel with the fixing kit.
• Wire power through a 3-terminal block for the 24 V DC supply.
• Connect analog inputs to a 4-terminal connector.
• Use removable screw terminal blocks for discrete inputs and outputs.
• Keep shielded fast input cables within 10 m.
• Keep unshielded digital input and output cables within 30 m.
• Keep unshielded analog input cables within 1 m.
• Keep shielded fast output cables within 3 m.
• Isolation reaches 500 V AC between I/O and internal logic.

Package Contents

• 1 × Schneider Electric TM221C40T logic controller
• Removable screw terminal blocks for inputs and outputs
• 3-terminal power supply block and 4-terminal analog connector
• Product documentation set

Shipping and Warranty

• We ship worldwide by FedEx, UPS, and DHL.
• Orders leave the warehouse within 1–3 business days after payment clears.
• Every unit carries a 12-month warranty against manufacturing defects.

FAQ

• Q: What makes the Q0 and Q1 outputs different from the rest?
  A: Q0 and Q1 switch at 100 kHz for PWM and pulse tasks. They also respond in 5 µs.
• Q: How accurate are the two analog inputs?
  A: They offer 10-bit resolution with ±1 % full-scale accuracy. Each channel converts in 1 ms plus one cycle.
• Q: Can the controller run a small positioning task?
  A: Yes, it drives two PTO axes in pulse/direction mode at 100 kHz. One axis also runs CW/CCW mode.
• Q: What happens during an output short circuit?
  A: Built-in protection trips at 1 A and resets automatically after 1 second.
• Q: How long does the battery keep data alive?
  A: The BR2032 battery backs up data for 1 year at 25 °C. Its total life reaches 4 years.
• Q: Does the controller meet marine standards?
  A: Yes, it holds ABS, DNV-GL, LR, and IACS E10 certifications for marine use.

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