How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
- Part number
- TM221C16R
- cULus
- CE
- UKCA
- EAC
Modicon M221Schneider Electric TM221C16R Modicon M221 16 I/O 9DI 7DO Relay Programmable Logic Controller
Modicon M221 logic controller, 16 I/O (9 DI, 7 relay DO, 2 A), 100-240 V AC, USB/RS485.
Description
About the TM221C16R
About the TM221C16R
The Schneider Electric TM221C16R is a Modicon M221 logic controller with 16 discrete I/O - 9 discrete inputs and 7 relay outputs rated 2 A - running from a 100-240 V AC supply. It provides 2 analog inputs, 4 fast counting inputs, and USB plus RS232/RS485 serial ports for hardwired machine control panels programmed in SoMachine Basic.
Certifications & Standards
- CE
- RCM
- ABS
- LR
- DNV-GL
- EAC
- cULus
- UKCA
- cULus HazLoc
- IEC 61131-2
- UL 508
- CAN/CSA C22.2 No. 213
- IACS E10
- ANSI/ISA 12-12-01
Selection Notes
The TM221C16R's 7 relay outputs (5-125 V DC or 5-250 V AC, 2 A each) switch AC loads such as contactor coils or pilot lights directly, without an external interposing relay - the transistor-output C16T switches only 24 V DC loads but reaches PWM/PLS output rates up to 100 kHz that this relay variant cannot match, since relay switching frequency here caps at 20 operations per minute at full load. Local I/O tops out at 9 DI / 7 DO; machines needing more points step up to the 24 I/O C24R or scale through the 4 local / 11 remote expansion module slots rather than moving to a larger base unit.
Applications
Hardwired relay-logic machine control panels - conveyor and packaging line control, small-machine automation, and panels switching contactor coils or 230 V pilot devices directly from the controller.
Specification
Full specification
Main 9
| Range of Product | Modicon M221 |
|---|---|
| Product or Component Type | Logic controller |
| [Us] rated supply voltage | 100...240 V AC |
| Discrete input number | 9, discrete input IEC 61131-2 Type 1 |
| Analogue input number | 2 0...10 V |
| Discrete output type | Relay normally open |
| Discrete output number | 7 relay |
| Discrete output voltage | 5...125 V DC, 5...250 V AC |
| Discrete output current | 2 A |
Complementary 58
| Discrete I/O number | 16 |
|---|---|
| Maximum number of I/O expansion module | 4 (local I/O-Architecture), 11 (remote I/O-Architecture) |
| Supply voltage limits | 85…264 V |
| Network Frequency | 50/60 Hz |
| Inrush current | 40 A |
| Maximum power consumption in VA | 46 VA 100...240 V with max number of I/O expansion module, 31 VA 100...240 V without I/O expansion module |
| Power supply output current | 0.325 A 5 V expansion bus, 0.12 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 maximum)analog input, +/- 13 V DC permanent)analog 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, 10 ms turn-on output, 10 ms turn-off output, 5 µs turn-on, I0, I1, I6, I7 fast input, 35 µs turn-on, other terminals input, 5 µs turn-off, I0, I1, I6, I7 fast input, 100 µs turn-off, other terminals input |
| Configurable filtering time | 0 ms input, 3 ms input, 12 ms input |
| Output voltage limits | 125 V DC, 277 V AC |
| Maximum current per output common | 6 A COM 1, 7 A COM 0 |
| Absolute accuracy error | +/- 1 % of full scale analog input |
| Electrical durability | 100000 cycles AC-12, 120 V, 240 VA, resistive, 100000 cycles AC-12, 240 V, 480 VA, resistive, 300000 cycles AC-12, 120 V, 80 VA, resistive, 300000 cycles AC-12, 240 V, 160 VA, resistive, 100000 cycles AC-15, cos phi = 0.35, 120 V, 60 VA, inductive, 100000 cycles AC-15, cos phi = 0.35, 240 V, 120 VA, inductive, 300000 cycles AC-15, cos phi = 0.35, 120 V, 18 VA, inductive, 300000 cycles AC-15, cos phi = 0.35, 240 V, 36 VA, inductive, 100000 cycles AC-14, cos phi = 0.7, 120 V, 120 VA, inductive, 100000 cycles AC-14, cos phi = 0.7, 240 V, 240 VA, inductive, 300000 cycles AC-14, cos phi = 0.7, 120 V, 36 VA, inductive, 300000 cycles AC-14, cos phi = 0.7, 240 V, 72 VA, inductive, 100000 cycles DC-12, 24 V, 48 W, resistive, 300000 cycles DC-12, 24 V, 16 W, resistive, 100000 cycles DC-13, 24 V, 24 W, inductive (L/R = 7 ms), 300000 cycles DC-13, 24 V, 7.2 W, inductive (L/R = 7 ms) |
| Switching frequency | 20 switching operations/minute with maximum load |
| Mechanical durability | 20000000 cycles relay output |
| Minimum load | 1 mA 5 V DC relay output |
| Protection type | Without protection 5 A |
| Reset time | 1 s |
| Memory capacity | 256 kB user application and data RAM 10000 instructions, 256 kB internal variables RAM |
| Data backed up | 256 kB built-in flash memory backup of application and data |
| Data storage equipment | 2 GB SD card optional) |
| Battery type | BR2032 or CR2032X lithium non-rechargeable |
| Backup time | 1 year 77 °F (25 °C) by interruption of power supply) |
| Execution time for 1 KInstruction | 0.3 ms event and periodic task |
| Execution time per instruction | 0.2 µs Boolean |
| Exct time for event task | 60 µs response time |
| Maximum size of object areas | 512 %KW constant words, 512 %M memory bits, 255 %C counters, 8000 %MW memory words, 255 %TM timers |
| Realtime clock | With |
| Clock drift | <= 30 s/month 77 °F (25 °C) |
| Regulation loop | Adjustable PID regulator up to 14 simultaneous loops |
| Counting input number | 4 fast input (HSC mode) 100 kHz 32 bits |
| counter function | Single phase, Frequency meter, Dual phase (quadrature), Dual phase (pulse/direction) |
| Integrated connection type | USB port mini B USB 2.0, Non isolated serial link serial 1 RJ45 RS485, Non isolated serial link serial 2 RJ45 RS232/RS485 |
| Supply | Serial)serial link supply 5 V, <200 mA |
| Transmission rate | 1.2...115.2 kbit/s (115.2 kbit/s by default) 49.2 ft (15 m) RS485, 1.2...115.2 kbit/s (115.2 kbit/s by default) 9.8 ft (3 m) RS232, 480 Mbit/s USB |
| Communication port protocol | USB port USB - SoMachine-Network, Non isolated serial link Modbus master/slave - RTU/ASCII or SoMachine-Network |
| Local signalling | 1 LED (green) for PWR, 1 LED (green) for RUN, 1 LED (red) for module error (ERR), 1 LED (green) for SD card access (SD), 1 LED (red) for BAT, 1 LED (green) for SL1, 1 LED (green) for SL2, 1 LED per channel (green) for I/O state |
| Electrical connection | removable screw terminal block for inputs, removable screw terminal block for outputs, terminal block, 3 for connecting the 24 V DC power supply, connector, 4 for analogue inputs, Mini B USB 2.0 connector for a programming terminal |
| Maximum cable distance between devices | Shielded cable <32.8 ft (10 m) fast input, Unshielded cable <98.4 ft (30 m) output, Unshielded cable <98.4 ft (30 m) digital input, Unshielded cable <3.3 ft (1 m) analog input |
| Insulation | Between input and internal logic 500 V AC, Non-insulated between analogue input and internal logic, Non-insulated between analogue inputs, Between supply and ground 1500 V AC, Between sensor power supply and ground 500 V AC, Between input and ground 500 V AC, Between output and ground 1500 V AC, Between supply and internal logic 2300 V AC, Between sensor power supply and internal logic 500 V AC, Between output and internal logic 2300 V AC, Between Ethernet terminal and internal logic 500 V AC, Between supply and sensor power supply 2300 V AC |
| Marking | CE |
| Sensor power supply | 24 V DC 250 mA supplied by the controller |
| Mounting support | Top hat type TH35-15 rail IEC 60715, Top hat type TH35-7.5 rail IEC 60715, plate or panel with fixing kit |
| Height | 3.5 in (90 mm) |
| Depth | 2.8 in (70 mm) |
| Width | 3.7 in (95 mm) |
| Net Weight | 0.763 lb(US) (0.346 kg) |
Environment 20
| Standards | IEC 61131-2, UL 508, CAN/CSA C22.2 No. 213, IACS E10, ANSI/ISA 12-12-01 |
|---|---|
| Product Certifications | RCM, ABS, LR, DNV-GL, EAC, cULus, CE, UKCA, cULus HazLoc |
| Environmental characteristic | Ordinary and hazardous location |
| Resistance to electrostatic discharge | 8 kV in air IEC 61000-4-2, 4 kV on contact IEC 61000-4-2 |
| Resistance to electromagnetic fields | 9.1 V/m (10 V/m) 80 MHz...1 GHz IEC 61000-4-3, 2.7 V/m (3 V/m) 1.4 GHz...2 GHz IEC 61000-4-3, 0.9 V/m (1 V/m) 2...2.7 GHz IEC 61000-4-3 |
| Resistance to magnetic fields | 98.4 A/m (30 A/m) 50/60 Hz IEC 61000-4-8 |
| Resistance to fast transients | 2 kV IEC 61000-4-4 power lines), 2 kV IEC 61000-4-4 relay output), 1 kV IEC 61000-4-4 I/O), 1 kV IEC 61000-4-4 Ethernet line), 1 kV IEC 61000-4-4 serial link) |
| Surge withstand | 2 kV power lines (AC) common mode IEC 61000-4-5, 2 kV relay output common mode IEC 61000-4-5, 1 kV I/O common mode IEC 61000-4-5, 1 kV shielded cable common mode IEC 61000-4-5, 0.5 kV power lines (DC) differential mode IEC 61000-4-5, 1 kV power lines (AC) differential mode IEC 61000-4-5, 1 kV relay output differential mode IEC 61000-4-5, 0.5 kV power lines (DC) common mode IEC 61000-4-5 |
| Resistance to conducted disturbances | 10 V 0.15...80 MHz IEC 61000-4-6, 3 V 0.1...80 MHz Marine specification (LR, ABS, DNV, GL), 10 V spot frequency (2, 3, 4, 6.2, 8.2, 12.6, 16.5, 18.8, 22, 25 MHz) Marine specification (LR, ABS, DNV, GL) |
| Electromagnetic emission | Conducted emissions 79 dBμV/m QP/66 dBμV/m AV power lines (AC))0.15…0.5 MHz IEC 55011, Conducted emissions 73 dBμV/m QP/60 dBμV/m AV power lines (AC))0.5…300 MHz IEC 55011, Conducted emissions 120...69 dBµV/m QP power lines)10…150 kHz IEC 55011, Conducted emissions 63 dBμV/m QP power lines)1.5…30 MHz IEC 55011, Radiated emissions 40 dBμV/m QP class A 10 m)30…230 MHz IEC 55011, Conducted emissions 79...63 dBμV/m QP power lines)150…1500 kHz IEC 55011, Radiated emissions 47 dBμV/m QP class A 10 m)200…1000 MHz IEC 55011 |
| Immunity to microbreaks | 10 ms |
| Ambient air temperature for operation | 14…131 °F (-10…55 °C) horizontal installation), 14…95 °F (-10…35 °C) vertical installation) |
| Ambient Air Temperature for Storage | -13…158 °F (-25…70 °C) |
| Relative humidity | 10…95 %, without condensation in operation), 10…95 %, without condensation in storage) |
| IP degree of protection | IP20 with protective cover in place |
| Pollution degree | <= 2 |
| Operating altitude | 0...6561.68 ft (0...2000 m) |
| Storage altitude | 0…9842.5 ft (0…3000 m) |
| Vibration resistance | 3.5 mm 5…8.4 Hz symmetrical rail, 3.5 mm 5…8.4 Hz panel mounting, 1 gn 8.4…150 Hz symmetrical rail, 1 gn 8.4…150 Hz panel mounting |
| Shock resistance | 98 m/s² 11 ms |
Show all 100 specifications ↓ Show less ↑13 more values in Identification, Contractual warranty, Logistics.
Identification 7
| Part number | TM221C16R |
|---|---|
| Brand | Schneider Electric |
| Condition | New, factory sealed |
| Source | Schneider Electric and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 3606480648694 |
Contractual warranty 1
| Warranty (in months) | 18 |
|---|
Logistics 5
| Country of origin | TW |
|---|---|
| Shipping weight | 0.346 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 30 Oct 2026
Documents
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Certifications
Certifications and standards
- cULus
- CE
- UKCA
- EAC
- IEC 61131-2
- UL 508
- CAN/CSA C22.2 No. 213
- IACS E10
- ANSI/ISA 12-12-01
Quick answers
Questions about the TM221C16R
Which supply voltage is TM221C16R rated for?
The rated operational voltage of TM221C16R is 100–240 V AC.
What is the HS code of TM221C16R for customs?
The tariff (HS) code on file for TM221C16R is 853710.
What is the EAN of TM221C16R?
The EAN (GTIN) of TM221C16R is 3606480648694.
Where does TM221C16R ship from, and how fast?
TM221C16R ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
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Series
Schneider Electric Modicon M221
- Brand
- Schneider Electric
- Series
- Modicon M221
