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Industrial Automation


  • $631.00

Logic controller, M221, 24 I/O, transistor NPN, Ethernet

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range of product

Modicon M221

product or component type    

Logic controller

[Us] rated supply voltage

24 V DC

discrete input number

14, discrete input 4 fast input conforming to IEC 61131-2 Type 1

analogue input number

2 at 0...10 V

discrete output type


discrete output number

10 transistor 2 fast output

discrete output voltage

24 V DC

discrete output current

0.5 A

discrete I/O number


maximum number of I/O expansion module    

7 for transistor output
7 for relay output

supply voltage limits

20.4…28.8 V

inrush current

35 A

maximum power consumption in W

14 W at 24 V (with max number of I/O expansion module)
4.8 W at 24 V (without I/O expansion module)

power supply output current

0.52 A 5 V for expansion bus
0.2 A 24 V for expansion bus

discrete input logic

Sink or source (positive/negative)

discrete input voltage

24 V

discrete input voltage type


analogue input resolution

10 bits

LSB value

10 mV

conversion time

1 ms per channel + 1 controller cycle time for analogue input analogue input

permitted overload on inputs

+/- 30 V DC for 5 min (maximum) for analogue input
+/- 13 V DC (permanent) for analog input

voltage state 1 guaranteed

>= 15 V for input

voltage state 0 guaranteed

<= 5 V for input

discrete input current

7 mA for discrete input
5 mA for fast input

input impedance

3.4 kOhm for discrete input
100 kOhm for analog input
4.9 kOhm for fast input

response time

35 µs turn-off, I2...I5 terminal(s) for input
5 µs turn-on, I0, I1, I6, I7 terminal(s) for fast input
35 µs turn-on, other terminals terminal(s) for input
5 µs turn-off, I0, I1, I6, I7 terminal(s) for fast input
100 µs turn-off, other terminals terminal(s) for input
5 µs turn-on, turn-off, Q0...Q1 terminal(s) for output
50 µs turn-on, turn-off, Q2...Q3 terminal(s) for output
300 µs turn-on, turn-off, other terminals terminal(s) for output

configurable filtering time

0 ms for input
3 ms for input
12 ms for input

discrete output logic

Negative logic (sink)

maximum current per output common

5 A

output frequency

100 kHz for fast output (PWM/PLS mode) at Q0...Q1
5 kHz for output at Q2...Q3
0.1 kHz for output at Q4...Q9

absolute accuracy error

+/- 1 % of full scale for analogue input

maximum leakage current

0.1 mA for transistor output

maximum voltage drop

<1 V

mechanical durability

20000000 cycles for transistor output

maximum tungsten load

<12 W for output and fast output

protection type

Without protection

memory capacity

256 kB for user application and data RAM with 10000 instructions
256 kB for internal variables RAM

data backed up

256 kB built-in flash memory for backup of application and data

data storage equipment

2 GB SD card (optional)

battery type

BR2032 lithium non-rechargeable, battery life: 4 year(s)

backup time

1 year at 25 °C (by interruption of the power supply)

execution time for 1 KInstruction

0.3 ms for an 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

255 %TM timers
512 %KW constant words
255 %C counters
512 %M memory bits
8000 %MW memory words

realtime clock


clock drift

<= 30 s/month at 25 °C

regulation loop

Adjustable PID regulator up to 14 simultaneous loops

positioning functions

Position PTO 2 axe(s)pulse/direction mode (100 kHz)
Position PTO 1 axe(s)CW/CCW mode (100 kHz)

function available

Frequency generator

counting input number

4 fast input (HSC mode) at 100 kHz 32 bits

counter function


integrated connection type

USB port with mini B USB 2.0 connector
Non-isolated serial link serial 1 with RJ45 connector and RS232/RS485 interface
Ethernet with RJ45 connector


(serial)serial link supply: 5 V, <200 mA

transmission rate

1.2...115.2 kbit/s (115.2 kbit/s by default) for bus length of 15 m for RS485
1.2...115.2 kbit/s (115.2 kbit/s by default) for bus length of 3 m for RS232
480 Mbit/s for 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 port with 100 m copper cable

communication service

Ethernet/IP adapter
Modbus TCP client
Modbus TCP slave device
Modbus TCP server
DHCP client

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 per channel (green) for I/O state
1 LED (green) for SL
Ethernet network activity (green) for ACT
Ethernet network link (yellow) for Link (Link Status)

electrical connection

removable screw terminal block for inputs
removable screw terminal block for outputs
terminal block, 3 terminal(s) for connecting the 24 V DC power supply
connector, 4 terminal(s) for analogue inputs
Mini B USB 2.0 connector for a programming terminal

maximum cable distance between devices

Shielded cable: <10 m for fast input
Unshielded cable: <30 m for output
Unshielded cable: <30 m for digital input
Unshielded cable: <1 m for analogue input
Shielded cable: <3 m for fast output


Between input and internal logic at 500 V AC
Between fast input and internal logic at 500 V AC
Non-insulated between inputs
Between output and internal logic at 500 V AC
Non-insulated between the analogue input and internal logic
Non-insulated between analogue inputs



mounting support

Top hat type TH35-15 rail conforming to IEC 60715
Top hat type TH35-7.5 rail conforming to IEC 60715
plate or panel with fixing kit


90 mm


70 mm


110 mm

net weight

0.57 kg