{"product_id":"schneider-tm221c40r-modicon-m221-40-i-o-relay-controller","title":"Schneider TM221C40R Modicon M221 40 I\/O Relay Controller","description":"\u003ch2\u003e\u003cstrong\u003eTM221C40R Modicon M221 Logic Controller — 40 I\/O Relay Output, 100-240 V AC\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eTM221C40R\u003c\/strong\u003e from Schneider Electric is a Modicon M221 logic controller built for panel builders and machine integrators. It runs on 100 to 240 V AC mains power and delivers 40 discrete I\/O points. The relay outputs switch both AC and DC loads directly, so many projects skip interposing relays. Engineers pick the \u003cstrong\u003eTM221C40R\u003c\/strong\u003e for its built-in analog inputs, fast counting channels, and seven-module expansion headroom.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eSummary\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe \u003cstrong\u003eTM221C40R\u003c\/strong\u003e offers 40 discrete I\/O with 24 inputs and 16 relay outputs.\u003c\/li\u003e\n  \u003cli\u003eIt accepts 100 to 240 V AC supply and tolerates 85 to 264 V mains swings.\u003c\/li\u003e\n  \u003cli\u003eTwo analog inputs measure 0 to 10 V with 10-bit resolution and 10 mV steps.\u003c\/li\u003e\n  \u003cli\u003eFour fast inputs run HSC counting at 100 kHz with 32-bit capacity.\u003c\/li\u003e\n  \u003cli\u003eThe controller supports up to 7 relay output expansion modules.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eTop Selling Points\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#c0392b;\"\u003e\u003cstrong\u003eRelay outputs switch 2 A at 5 to 125 V DC and 5 to 250 V AC\u003c\/strong\u003e\u003c\/span\u003e without external relays.\u003c\/li\u003e\n  \u003cli\u003eMechanical relay life reaches 20 million cycles for long service intervals.\u003c\/li\u003e\n  \u003cli\u003eBuilt-in 24 V DC sensor supply delivers 250 mA for field devices.\u003c\/li\u003e\n  \u003cli\u003eSeven expansion modules extend I\/O far beyond the base 40 points.\u003c\/li\u003e\n  \u003cli\u003eAdjustable PID control handles up to 14 simultaneous loops.\u003c\/li\u003e\n  \u003cli\u003eA real-time clock with 30 s\/month drift keeps event logs accurate.\u003c\/li\u003e\n  \u003cli\u003eThe unit survives 10 ms microbreaks without restarting.\u003c\/li\u003e\n  \u003cli\u003eMarine-grade EMC compliance covers LR, ABS, DNV, and GL standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCore Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Schneider Electric\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e \u003cstrong\u003eTM221C40R\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Range:\u003c\/strong\u003e Modicon M221 logic controller\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Supply Voltage:\u003c\/strong\u003e 100 to 240 V AC, 50\/60 Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupply Limits:\u003c\/strong\u003e 85 to 264 V AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInrush Current:\u003c\/strong\u003e 40 A or less\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Consumption:\u003c\/strong\u003e \u003cspan style=\"color:#c0392b;\"\u003e\u003cstrong\u003e37 VA\u003c\/strong\u003e\u003c\/span\u003e without expansion; 67 VA with maximum expansion\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiscrete I\/O Count:\u003c\/strong\u003e 40 points total\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiscrete Inputs:\u003c\/strong\u003e 24 inputs, type 1 per IEC 61131-2, sink or source\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e 24 V DC, with state 1 at 15 V or above and state 0 at 5 V or below\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Current:\u003c\/strong\u003e 7 mA standard; 5 mA fast input\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Impedance:\u003c\/strong\u003e 3.4 kOhm standard; 4.9 kOhm fast; 100 kOhm analog\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalog Inputs:\u003c\/strong\u003e 2 channels, 0 to 10 V range, 10-bit resolution\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalog Accuracy:\u003c\/strong\u003e +\/- 1 % of full scale; LSB value 10 mV\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalog Overload:\u003c\/strong\u003e +\/- 30 V DC for 5 minutes; +\/- 13 V DC continuous\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConversion Time:\u003c\/strong\u003e 1 ms per channel plus one controller cycle\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiscrete Outputs:\u003c\/strong\u003e 16 relay, normally open\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Current:\u003c\/strong\u003e 2 A per point; 7 A per common terminal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Voltage Range:\u003c\/strong\u003e 5 to 125 V DC and 5 to 250 V AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResponse Time:\u003c\/strong\u003e \u003cspan style=\"color:#c0392b;\"\u003e\u003cstrong\u003e5 µs\u003c\/strong\u003e\u003c\/span\u003e turn-on for fast inputs; 10 ms for relay outputs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFiltering:\u003c\/strong\u003e Configurable at 0 ms, 3 ms, or 12 ms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitching Frequency:\u003c\/strong\u003e 20 operations per minute at maximum load\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Load:\u003c\/strong\u003e 1 mA at 5 V DC for relay contacts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMemory:\u003c\/strong\u003e 256 kB application RAM; 256 kB internal variables; 256 kB flash backup\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eData Storage:\u003c\/strong\u003e Optional 2 GB SD card\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e BR2032 lithium, 4-year life, 1-year backup at 25 °C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExecution Speed:\u003c\/strong\u003e 0.2 µs per Boolean instruction; 0.3 ms per 1 K instruction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eObject Areas:\u003c\/strong\u003e 512 %M bits, 8000 %MW words, 512 %KW words, 255 timers, 255 counters\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCounting:\u003c\/strong\u003e 4 HSC channels at 100 kHz, 32-bit, with A\/B, pulse\/direction, and single-phase modes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eConnectivity Tree\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eProgramming port\n    \u003cul\u003e\n      \u003cli\u003eMini B USB 2.0 at 480 Mbit\/s\u003c\/li\u003e\n      \u003cli\u003eSoMachine-Network protocol support\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003eSerial link 1\n    \u003cul\u003e\n      \u003cli\u003eRJ45 connector with RS485 interface\u003c\/li\u003e\n      \u003cli\u003eModbus master\/slave RTU\/ASCII\u003c\/li\u003e\n      \u003cli\u003e1.2 to 115.2 kbit\/s, 15 m bus length\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003eSerial link 2\n    \u003cul\u003e\n      \u003cli\u003eRJ45 connector with RS232\/RS485 interface\u003c\/li\u003e\n      \u003cli\u003e1.2 to 115.2 kbit\/s, 3 m bus length on RS232\u003c\/li\u003e\n      \u003cli\u003e5 V at 200 mA serial link supply\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n  \u003cli\u003eStatus LEDs\n    \u003cul\u003e\n      \u003cli\u003ePWR, RUN, ERR, SD, BAT, SL1, SL2\u003c\/li\u003e\n      \u003cli\u003eOne green LED per I\/O channel\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eEnvironmental and Immunity Data\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOperating temperature spans -10 to 55 °C for horizontal mounting.\u003c\/li\u003e\n  \u003cli\u003eVertical mounting narrows the range to -10 to 35 °C.\u003c\/li\u003e\n  \u003cli\u003eStorage temperature spans -25 to 70 °C with 10 to 95 % humidity.\u003c\/li\u003e\n  \u003cli\u003eElectrostatic discharge immunity reaches 8 kV air and 4 kV contact.\u003c\/li\u003e\n  \u003cli\u003eRadiated field immunity holds 10 V\/m from 80 MHz to 1 GHz.\u003c\/li\u003e\n  \u003cli\u003eMagnetic field immunity reaches 30 A\/m at 50\/60 Hz.\u003c\/li\u003e\n  \u003cli\u003eFast transient immunity reaches 2 kV on power lines and relay outputs.\u003c\/li\u003e\n  \u003cli\u003eSurge withstand reaches 2 kV common mode on AC lines and relay outputs.\u003c\/li\u003e\n  \u003cli\u003eConducted disturbance immunity reaches 10 Vrms from 0.15 to 80 MHz.\u003c\/li\u003e\n  \u003cli\u003eShock resistance reaches 98 m\/s² over an 11 ms wave.\u003c\/li\u003e\n  \u003cli\u003eVibration resistance reaches 3.5 mm at 5 to 8.4 Hz and 1 gn at 8.4 to 150 Hz.\u003c\/li\u003e\n  \u003cli\u003eInsulation between output and internal logic reaches 2300 V AC.\u003c\/li\u003e\n  \u003cli\u003eInsulation between supply and ground reaches 1500 V AC.\u003c\/li\u003e\n  \u003cli\u003eThe unit works at altitudes up to 2000 m and stores up to 3000 m.\u003c\/li\u003e\n  \u003cli\u003ePollution degree stays at 2 or lower with IP20 protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eInstallation Guide\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eClip the controller onto a TH35-15 or TH35-7.5 rail per IEC 60715.\u003c\/li\u003e\n  \u003cli\u003eUse the fixing kit for plate or panel mounting when rails are absent.\u003c\/li\u003e\n  \u003cli\u003eFeed 100 to 240 V AC into the 3-terminal power block.\u003c\/li\u003e\n  \u003cli\u003eWire analog inputs through the 4-terminal connector with 1 m maximum cable.\u003c\/li\u003e\n  \u003cli\u003eKeep digital input cable under 30 m and fast input cable under 10 m shielded.\u003c\/li\u003e\n  \u003cli\u003eLimit output cable runs to 30 m unshielded to reduce noise pickup.\u003c\/li\u003e\n  \u003cli\u003eRespect the 2300 V AC isolation boundary between outputs and logic.\u003c\/li\u003e\n  \u003cli\u003eInsert the BR2032 battery to keep application data during outages.\u003c\/li\u003e\n  \u003cli\u003eAdd a 2 GB SD card for recipe and log storage.\u003c\/li\u003e\n  \u003cli\u003eCheck the 40 A inrush current against your breaker curve.\u003c\/li\u003e\n  \u003cli\u003eAllow 37 VA minimum panel thermal budget without expansion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003ePackage List\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x \u003cstrong\u003eTM221C40R\u003c\/strong\u003e logic controller unit\u003c\/li\u003e\n  \u003cli\u003e1 x removable screw terminal block for inputs\u003c\/li\u003e\n  \u003cli\u003e1 x removable screw terminal block for outputs\u003c\/li\u003e\n  \u003cli\u003e1 x 3-terminal block for AC power supply\u003c\/li\u003e\n  \u003cli\u003e1 x 4-terminal connector for analog inputs\u003c\/li\u003e\n  \u003cli\u003e1 x BR2032 lithium battery\u003c\/li\u003e\n  \u003cli\u003e1 x protective cover for IP20 rating\u003c\/li\u003e\n  \u003cli\u003e1 x installation reference sheet\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eShipping and Warranty\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eWe ship worldwide through FedEx, UPS, and DHL express services.\u003c\/li\u003e\n  \u003cli\u003eOrders leave our warehouse within 1 to 2 business days.\u003c\/li\u003e\n  \u003cli\u003eTracking details arrive by email once the carrier scans the parcel.\u003c\/li\u003e\n  \u003cli\u003eEach unit carries a 12-month warranty against manufacturing defects.\u003c\/li\u003e\n  \u003cli\u003ePacking weight is about 0.456 kg per unit in a compact carton.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Can the relay outputs drive a 240 V AC contactor coil?\u003c\/strong\u003e\u003cbr\u003eA: Yes, each relay switches 2 A at up to 250 V AC, which suits most contactor coils.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: How many expansion modules can I attach?\u003c\/strong\u003e\u003cbr\u003eA: You can add up to 7 relay output expansion modules to the base unit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Do the analog inputs need an external supply?\u003c\/strong\u003e\u003cbr\u003eA: No, the controller provides a 24 V DC sensor supply at 250 mA.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: What happens during a short mains dip?\u003c\/strong\u003e\u003cbr\u003eA: The controller rides through 10 ms microbreaks without a restart or data loss.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQ: Which counting modes do the fast inputs support?\u003c\/strong\u003e\u003cbr\u003eA: They support A\/B quadrature, pulse\/direction, and single-phase modes at 100 kHz.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eOrder Information\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAsk our team for a quotation on the \u003cstrong\u003eTM221C40R\u003c\/strong\u003e today.\u003c\/li\u003e\n  \u003cli\u003eWe confirm stock, lead time, and freight cost within one business day.\u003c\/li\u003e\n  \u003cli\u003eBundle expansion modules and SD cards into a single shipment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e© 2026 Ubest Automation Limited. \u003ca href=\"https:\/\/www.ubestplc.com\/\"\u003ehttps:\/\/www.ubestplc.com\/\u003c\/a\u003e All rights reserved.\u003c\/strong\u003e\u003cbr\u003e\nContact: \u003ca href=\"mailto:sales@ubestplc.com\"\u003esales@ubestplc.com\u003c\/a\u003e | \u003ca href=\"https:\/\/wa.me\/868618030005825\"\u003e+86 86 180 3000 5825\u003c\/a\u003e\u003c\/p\u003e","brand":"Schneider","offers":[{"title":"Default Title","offer_id":53160774533402,"sku":"TM221C40R","price":257.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0873\/6240\/4634\/files\/TM221C40R.jpg?v=1792659650","url":"https:\/\/www.ubestplc.com\/products\/schneider-tm221c40r-modicon-m221-40-i-o-relay-controller","provider":"Ubest Automation Limited","version":"1.0","type":"link"}