Schneider Electric PLC Modicon M221 Programmable Logic Controller

The Schneider electric plc Modicon M221 logic controller offers best-in-class performance. Available in brick or book format, it requires minimal installation and offers tremendous versatility. Connect a simple remote operator panel for instant maintenance and machine visualization.



Contact us


  • Simple navigation delivers a more efficient engineering process
  • All programming, visualization, and commissioning are handled in just one intuitive tool
  • Available as a free download
  • No training required


Range of Product Modicon M221
Product or Component Type Logic controller
[Us] rated supply voltage 24 V DC
Discrete input number 24, discrete input 4 fast input IEC 61131-2 Type 1
Analogue input number 2 0…10 V
Discrete output type Transistor
Discrete output number 16 transistor 2 fast output
Discrete output voltage 24 V DC
Discrete output current 0.5 A
Discrete I/O number 40
Maximum number of I/O expansion module 7 (local I/O-Architecture)
14 (remote I/O-Architecture)
Supply voltage limits 20.4…28.8 V
Inrush current 35 A
Maximum power consumption in W 17 W 24 V with max number of I/O expansion module)
4.9 W 24 V without I/O expansion module)
Power supply output current 0.52 A 5 V expansion bus
0.3 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
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
5 µs turn-on, turn-off, Q0…Q1 output
50 µs turn-on, turn-off, Q2…Q3 output
300 µs turn-on, turn-off, other terminals output
Configurable filtering time 0 ms input
3 ms input
12 ms input
Discrete output logic Positive logic (source)
Maximum current per output common 4 A
Output Frequency (sync to mains) 100 kHz fast output (PWM/PLS mode) Q0…Q1
5 kHz output Q2…Q3
0.1 kHz output Q4…Q15
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 1 A
Reset time 1 s automatic reset
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 lithium non-rechargeable 4 year(s)
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
255 %TM timers
255 %C counters
8000 %MW memory words
512 %M memory bits
Realtime clock With
Clock drift <= 30 s/month 77 °F (25 °C)
Regulation loop Adjustable PID regulator up to 14 simultaneous loops
Positioning functions PTO 2 pulse/direction 100 kHz)
PTO 1 CW/CCW 100 kHz)
Function Available PWM
Frequency generator
Counting input number 4 fast input (HSC mode) 100 kHz 32 bits
counter function A/B
Single phase
Integrated connection type USB port mini B USB 2.0
Non isolated serial link serial 1 RJ45 RS232/RS485
Ethernet RJ45
Supply Serial)serial link supply 5 V, <200 mA
Transmission rate 1.2…115.2 kbit/s (115.2 kbit/s by default) 49.21 ft (15 m) RS485
1.2…115.2 kbit/s (115.2 kbit/s by default) 9.84 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
Port Ethernet 10BASE-T/100BASE-TX 1 328.08 ft (100 m) copper cable
Communication Service Modbus TCP slave device
Ethernet/IP adapter
Modbus TCP server
Modbus TCP client
DHCP client
Local signalling For PWR 1 LED (green)
for RUN 1 LED (green)
for module error (ERR) 1 LED (red)
for SD card access (SD) 1 LED (green)
for BAT 1 LED (red)
for I/O state 1 LED per channel (green)
for SL 1 LED (green)
for ACT Ethernet network activity (green)
for Link (Link Status) Ethernet network link (yellow)
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 <32.81 ft (10 m) fast input
Unshielded cable <98.43 ft (30 m) output
Unshielded cable <98.43 ft (30 m) digital input
Unshielded cable <3.28 ft (1 m) analog input
Shielded cable <9.84 ft (3 m) fast output
Insulation Between input and internal logic 500 V AC
Between fast input and internal logic 500 V AC
Non-insulated between inputs
Between output and internal logic 500 V AC
Non-insulated between analogue input and internal logic
Non-insulated between analogue inputs
Marking CE
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 3.54 in (90 mm)
Depth 2.76 in (70 mm)
Width 6.30 in (160 mm)
Product Weight 1.01 lb(US) (0.456 kg)
Standards EN/IEC 60664-1
EN/IEC 61131-2
EN/IEC 61010-2-201
Product Certifications RCM
Environmental characteristic Ordinary and hazardous location
Resistance to electrostatic discharge 8 kV in air EN/IEC 61000-4-2
4 kV on contact EN/IEC 61000-4-2
Resistance to electromagnetic fields 9.14 V/m (10 V/m) 80 MHz…1 GHz EN/IEC 61000-4-3
2.74 V/m (3 V/m) 1.4 GHz…2 GHz EN/IEC 61000-4-3
0.91 V/m (1 V/m) 2…2.7 GHz EN/IEC 61000-4-3
Resistance to magnetic fields 98.43 A/m (30 A/m) 50/60 Hz EN/IEC 61000-4-8
Resistance to fast transients 2 kV EN/IEC 61000-4-4 power lines)
2 kV EN/IEC 61000-4-4 relay output)
1 kV EN/IEC 61000-4-4 I/O)
1 kV EN/IEC 61000-4-4 Ethernet line)
1 kV EN/IEC 61000-4-4 serial link)
Surge withstand 2 kV power lines (AC) common mode EN/IEC 61000-4-5
2 kV relay output common mode EN/IEC 61000-4-5
1 kV I/O common mode EN/IEC 61000-4-5
1 kV shielded cable common mode EN/IEC 61000-4-5
0.5 kV power lines (DC) differential mode EN/IEC 61000-4-5
1 kV power lines (AC) differential mode EN/IEC 61000-4-5
1 kV relay output differential mode EN/IEC 61000-4-5
0.5 kV power lines (DC) common mode EN/IEC 61000-4-5
Resistance to conducted disturbances 10 V 0.15…80 MHz EN/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 EN/IEC 55011
Conducted emissions 73 dBμV/m QP/60 dBμV/m AV power lines (AC))0.5…300 MHz EN/IEC 55011
Conducted emissions 120…69 dBµV/m QP power lines)10…150 kHz EN/IEC 55011
Conducted emissions 63 dBμV/m QP power lines)1.5…30 MHz EN/IEC 55011
Radiated emissions 40 dBμV/m QP class A 10 m)30…230 MHz EN/IEC 55011
Conducted emissions 79…63 dBμV/m QP power lines)150…1500 kHz EN/IEC 55011
Radiated emissions 47 dBμV/m QP class A 10 m)200…1000 MHz EN/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 0.00…9842.52 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 147 m/s² 11 ms