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Brand: Schneider Electric
Schneider Electric TM221C16T Modicon M221 16 I/O Transistor PNP
Description
TM221C16T a compact 16 I/O Modicon M221 with transistor outputs
The TM221C16T is a Schneider Electric product listed in the datasheet as: logic controller, Modicon M221, 16 IO, 9 DI, 7 DO, transistor, PNP. The TM221C16T is the smallest transistor controller in this M221 selection, with 9 inputs and 7 transistor outputs on a 24 V DC supply. It has no Ethernet port, so it suits stand-alone machines with serial communication and a small number of sensors. Seven Star LLC supplies the TM221C16T in Oman and the GCC as an independent supplier based in Muscat.
Decoding the reference: C is compact, 16 the I/O count and T transistor output. The datasheet says 9 DI, 7 DO, PNP, and lists 4 fast inputs and 2 fast outputs.
Technical specifications of the TM221C16T
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Schneider Electric / TM221C16T |
| Description | logic controller, Modicon M221, 16 IO, 9 DI, 7 DO, transistor, PNP |
| Range of Product | Modicon M221 |
| Product or Component Type | Logic controller |
| [Us] rated supply voltage | 24 V DC |
| Discrete input number | 9, discrete input 4 fast input IEC 61131-2 Type 1 |
| Analogue input number | 2 0 to 10 V |
| Discrete output type | Transistor |
| Discrete output number | 7 transistor 2 fast output |
| Discrete output voltage | 24 V DC |
| Discrete output current | 0.5 A |
| Discrete I/O number | 16 |
| Maximum number of I/O | 4 (local I/O-Architecture) |
| expansion module | 11 (remote I/O-Architecture) |
| Supply voltage limits | 20.4 to 28.8 V |
| Inrush current | 35 A |
| Maximum power consumption in | 10 W 24 V with max number of I/O expansion module |
| W | 3.9 W 24 V without I/O expansion module |
| Power supply output current | 0.325 A 5 V expansion bus; 0.15 A 24 V expansion bus |
| Discrete input logic | Sink or source (positive/negative) |
| Discrete input voltage | 24 V |
| Discrete input voltage type | DC |
| Analogue input resolution | 10 bits |
| LSB value | 10 mV |
| Conversion time | 1 ms per channel + 1 controller cycle time analog input |
| Permitted overload on inputs | ± 30 V DC 5 min maximumanalog input; ± 13 V DC permanentanalog input |
| Voltage state 1 guaranteed | >= 15 V input |
| Voltage state 0 guaranteed | <= 5 V input |
| Discrete input current | 7 mA discrete input; 5 mA fast input |
| Input impedance | 3.4 kOhm discrete input; 100 kOhm analog input; 4.9 kOhm fast input |
| Response time | 35 µs turn-off, I2–I5 input; 5 µs turn-on, I0, I1, I6, I7 fast input; 35 µs turn-on, other terminals input |
| Configurable filtering time | 0 ms input; 3 ms input; 12 ms input |
| Discrete output logic | Positive logic (source) |
| Maximum current per output | 3.5 A |
| Output frequency | 100 kHz fast output (PWM/PLS mode) Q0–Q1; 5 kHz output Q2–Q3; 0.1 kHz output Q4–Q6 |
| Absolute accuracy error | ± 1 % of full scale analog input |
| Maximum leakage current | 0.1 mA transistor output |
| Maximum voltage drop | <1 V |
| Mechanical durability | 20000000 cycles transistor output |
| Maximum tungsten load | <12 W output and fast output |
| Protection type | Overload and short-circuit protection 0.2 A |
| Reset time | 1 s automatic reset |
What the TM221C16T offers in a small footprint
Supply voltage: 24 V DC. Supply voltage limits: 20.4 to 28.8 V. Discrete inputs: 9, discrete input 4 fast input IEC 61131-2 Type 1. Discrete outputs: 7 transistor 2 fast output. Discrete I/O: 16. Analogue inputs: 2 0 to 10 V. Input resolution: 10 bits. Input voltage: 24 V. Output type: Transistor. Output voltage: 24 V DC. Output current: 0.5 A. Communication protocols: USB port USB – SoMachine-Network; Non isolated serial link Modbus master/slave – RTU/ASCII or SoMachine-Network. Output current: 0.325 A 5 V expansion bus; 0.15 A 24 V expansion bus. Mechanical durability: 20000000 cycles transistor output.
The controller has four fast inputs reaching 5 microsecond response and two fast outputs for pulse or PWM output, together with two 0 to 10 V analogue inputs. Output current is 0.5 A in the datasheet table with a maximum of 3.5 A per common group.
Local expansion is limited to 4 modules (11 in the remote architecture), and the 24 V supply output is 0.15 A with 0.325 A on the 5 V bus. Power use is as low as 3.9 W, which suits small panels with limited power.
Limits and upgrade path for the TM221C16T
Without Ethernet, remote programming and HMI connection use the serial and USB ports. If the project later needs Modbus TCP, the TM221CE16T or the CE24T provides the same I/O style with a network port.
Because expansion is limited, make sure the I/O count including spare points fits within the base plus four modules. Planning 15 percent spare channels avoids a change of controller late in the project.
Selection checklist for the TM221C16T
- Count the sensors and actuators and compare with 9 inputs and 7 outputs.
- Check whether any signal needs a fast input or output.
- Confirm that PNP (source) outputs match the loads.
- Define the communication needs; there is no Ethernet on this model.
- Check that 24 V DC power is available with adequate margin.
- Plan expansion modules for growth within the limit of four.
Commissioning the TM221C16T
After wiring, power the controller and check that all inputs show correctly in the online monitor. Test each output in force mode with loads disconnected first, and note which outputs are fast ones.
Create the first backup of the project and application right after commissioning. Small controllers are often sold inside machines, and the program file is the most valuable asset for any later repair.
Typical applications of the TM221C16T in Oman and the GCC
In Oman and the GCC this size is used in small compressors, tank level control, ventilation units, gates and small processing machines. The tough conditions are heat in outdoor panels and dust, so use cabinets with filters and sunshades.
Dimensions, environment and approvals of the TM221C16T
For the TM221C16T, plan the mounting space from the datasheet: 95 mm (W) x 90 mm (H) x 70 mm (D). The TM221C16T weighs 0.346 kg. Mounting, derating and enclosure choices follow the environmental data below, which should be compared with the actual panel temperature and the dust and humidity of the site in Oman and the GCC.
Ambient temperature limits in the datasheet: -10 to 55 °C horizontal installation. Relative humidity: 10 to 95 %, without condensation in operation; 10 to 95 %, without condensation in storage. Ingress protection: IP20 with protective cover in place. Operating altitude: 0 to 2000 m. Vibration resistance: 3.5 mm 5 to 8.4 Hz symmetrical rail; 3.5 mm 5 to 8.4 Hz panel mounting; 1 gn 8.4 to 150 Hz symmetrical rail; 1 gn 8.4 to 150 Hz panel mounting. Shock resistance: 147 m/s² 11 ms. Standards listed: IEC 61131-2; UL 508; CAN/CSA C22.2 No. 213; IACS E10; ANSI/ISA 12-12-01. Certifications listed for this reference: RCM; LR cULus; ABS; EAC; DNV-GL; CE; UKCA cULus HazLoc.
Information to send with an RFQ for the TM221C16T
- Full reference and quantity required
- Existing equipment, panel or rack it must fit
- Supply voltage, load or signal details of the application
- Required delivery location and timing
- Whether a spare, a replacement or a new installation
Documents and quotation
A datasheet for this product is attached on this page. It lists the electrical, mechanical and environmental data summarised above.
Send us the part number, quantity and application and we will confirm availability and a quotation. Seven Star LLC is an independent supplier in Muscat and does not represent itself as an official channel of the manufacturer.
Other Models in the Se Tm221 Range
Seven Star LLC supplies models from the Se Tm221 range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Schneider Electric TM221CE24T Modicon M221 24 I/O Transistor | Logic Controllers | View details |
| Schneider Electric TM221CE40R Modicon M221 40 I/O Relay | Logic Controllers | View details |
| Schneider Electric TM221C16T Modicon M221 16 I/O Transistor PNP | Logic Controllers | You are viewing this model |
Datasheets & Documents
- Datasheet Schneider Electric TM221C16T Datasheet Download
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About brand
Schneider Electric is the French group for energy management and industrial automation: low and medium voltage switchgear and circuit breakers, motor control, drives, PLCs, power monitoring, UPS systems and building management. Its history goes back to 1836, when the brothers Adolphe and Eugène Schneider took over the iron and steel works at Le Creusot in Burgundy. Over the 20th century the company left steel and heavy engineering and became an electrical group through acquisitions such as Merlin Gerin, Télémécanique, Square D and Modicon. Its head office is in Rueil-Malmaison near Paris, and its shares are listed on Euronext Paris.
Schneider Electric company profile
| Origins | 1836, Le Creusot, France: Adolphe and Eugène Schneider take over the Le Creusot foundry |
|---|---|
| Headquarters | Rueil-Malmaison (Paris region), France |
| Ownership | Public company listed on Euronext Paris |
| Key acquisitions | Télémécanique (1988), Square D (1991), Merlin Gerin (1992), Modicon (1997), APC (2007), Invensys (2014); majority owner of AVEVA software |
| Brand names still in use | Acti9, ComPacT and MasterPacT breakers, TeSys motor control, Altivar drives, Altistart soft starters, Modicon PLCs, Harmony control components, PowerLogic and Easergy protection and metering, APC UPS, EcoStruxure software platform |
| Product families | Low voltage distribution, medium voltage switchgear and protection relays, motor control and drives, PLCs and HMIs, power meters, UPS and cooling, enclosures, building automation and energy software |
Milestones
- 1836: The Schneider brothers acquire the Le Creusot works; the business grows in steel, locomotives and heavy engineering.
- 1975: First investment in Merlin Gerin, a French maker of electrical distribution equipment.
- 1988–1992: Télémécanique, Square D (USA) and Merlin Gerin join the group, making it an electrical specialist.
- 1997: Modicon, the company behind the first programmable logic controller, joins the group.
- 1999: The group takes the name Schneider Electric.
- 2007 and 2014: APC (UPS and data centre power) and Invensys (process automation) are acquired.
Choosing Schneider Electric breakers and motor control
Circuit breakers are chosen by current and breaking capacity. Acti9 miniature circuit breakers (iC60, C120) protect final circuits up to 125 A. ComPacT NSX molded case breakers cover about 16 to 630 A, and the letter after the frame size sets the breaking capacity: B, F, N, H, S, L from lowest to highest. MasterPacT air circuit breakers are used as main incomers on large switchboards. For motors, a TeSys contactor with an LRD overload relay or a GV2 motor circuit breaker suits direct starting, an Altistart soft starter reduces starting current, and an Altivar drive controls speed. The breaking capacity must always be at least the prospective short-circuit current at the point of installation.
Where Schneider Electric products are used
In Oman and the GCC, Schneider Electric equipment is found in main and sub-main switchboards of commercial and residential buildings, motor control centres in water, oil and gas and industrial plants, substations protected by Sepam and Easergy relays, data centres powered by Galaxy and APC UPS systems, and buildings controlled by EcoStruxure Building Operation.
APC by Schneider Electric: UPS and critical power
Since 2007, APC has been part of Schneider Electric and is now its product brand for uninterruptible power supplies, replacement batteries, battery packs, network management cards and rack power distribution. Our APC catalogue covers Smart-UPS line-interactive and on-line models, Easy UPS On-Line, the modular Symmetra LX, RM and PX ranges, Silcon three-phase systems and their spare part kits, and the RBC cartridges that keep them running. Schneider Electric breakers, drives and PLCs can be quoted together with APC UPS systems in one request.
Schneider Electric products we list
| Family | Examples |
|---|---|
| Circuit breakers | Acti9 iC60N, C120N, NSX100F, NSX250N, NSX630, EasyPact EZC, MasterPacT MTZ1, MasterPacT NW |
| Motor control | TeSys Deca LC1D, TeSys F, LRD overload relay, GV2ME08, Altistart 22, Altistart 480 |
| Drives | Altivar 12, Altivar 320, ATV340, Altivar Process 630, ATV930, Lexium 32 servo |
| PLCs, HMIs and relays | Modicon M221, M241, M580 BMEP582040, Zelio Logic, Magelis HMISTU655 |
| Protection, metering and power | Sepam series 20, Easergy P3U30, MiCOM P139, PM5560, iEM3255, Galaxy VS UPS |
Ordering Schneider Electric products: what we need
Send the commercial reference from the label (for example LC1D18M7 or ATV320U22N4C). For breakers, confirm the rated current, number of poles, breaking capacity and trip unit. For contactors, give the coil voltage. For drives, give the motor power and supply voltage. APC products are listed on their own brand page.
Facts checked against Schneider Electric's published company history, October 2026.
Browse Schneider Electric products by category: Circuit Breaker, Electrical & Power Modules, AC Drives, PLC & I/O Cards, Metering Systems, UPS and Batteries.
FAQ
Questions about the Schneider Electric TM221C16T Modicon M221 16 I/O
Answers from our engineering team on installation, compatibility and integration.
01How many I/O does the TM221C16T have?
The datasheet gives 16.
02What supply does the TM221C16T use?
The datasheet gives 24 V DC.
03How many local expansion modules can the TM221C16T take?
The datasheet gives 4 (local I/O-Architecture).
04What is the power consumption of the TM221C16T?
The datasheet gives 10 W 24 V with max number of I/O expansion module.
05What is the net weight of the TM221C16T?
The datasheet gives 0.346 kg.
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