Modicon M251

Logic controller

24 V DC

7 with local I/O architecture
14 with remote I/O architecture

20.4...28.8 V

<= 50 A

32.6...40.4 W with max number of I/O expansion module

8 MB program
64 MB system memory RAM

128 MB built-in flash memory for backup of user programs

<= 32 GB SD card optional

BR2032 lithium non-rechargeable, battery life: 4 yr

2 years at 25 °C

0.3 ms event and periodic task
0.7 ms other instruction

0.022 µs

8 external event tasks
8 event tasks
4 cyclic master tasks
3 cyclic master tasks + 1 freewheeling task

With

<= 60 s/month at 25 °C

USB port with mini B USB 2.0 connector
Non isolated serial link "serial" with RJ45 connector; physical interface: RS232/RS485
Dual-port "Ethernet" with RJ45 connector
CANopen J1939 with SUB-D 9 connector

5 V at 200 mA serial link supply with "serial" marking

1.2...115.2 kbit/s (115.2 kbit/s by default) for bus length of 15 m - communication protocol: RS485
1.2...115.2 kbit/s (115.2 kbit/s by default) for bus length of 3 m - communication protocol: RS232
480 Mbit/s for bus length of 3 m - communication protocol: USB

USB port - USB protocol ; transmission frame: SoMachine-Network
Non isolated serial link - Modbus protocol ; transmission frame: RTU/ASCII or SoMachine-Network with master/slave method

"Ethernet" marking 10BASE-T/100BASE-TX - 2 port copper cable

Web server

DHCP client
Downloading
Ethernet/IP slave device
IEC VAR ACCESS
Modbus TCP client
Modbus TCP server
Modbus TCP slave device
Monitoring
NGVL
Programming
Updating firmware
SMS notifications
SNMP client/server
FTP client/server
SQL client
Send and receive email from the controller based on TCP/UDP library
Web server (WebVisu & XWeb system)
OPC UA server
DNS client

8 Modbus server
8 Modbus client
16 Ethernet/IP target
4 FTP server
10 web server
8 SoMachine protocol

DS 301 V4.02
DR 303-1

<= 63 CANopen

1 LED green for SD card access (SD)
1 LED red for BAT
1 LED green for SL
1 LED red for I/O error (I/O)
1 LED red for bus fault on TM4 (TM4)
1 LED green for Ethernet port activity
1 LED green for CANopen run
1 LED green for CANopen error
1 LED red for module error (ERR)
1 LED green for PWR
1 LED green for RUN

Removable screw terminal block for power supply with pitch 5.08 mm adjustment

Non-insulated between supply and internal logic
Between supply and ground at 500 V AC

CE

1 kV (shielded cable) with common mode protection conforming to EN/IEC 61000-4-5
1 kV (power lines) with common mode protection conforming to EN/IEC 61000-4-5
0.5 kV (power lines) with differential mode protection conforming to EN/IEC 61000-4-5

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

95 mm

54 mm

0.22 kg

CSA C22.2 No 142
ANSI/ISA 12-12-01
UL 1604
CSA C22.2 No 213
EN/IEC 61131-2 : 2007
Marine specification (LR, ABS, DNV, GL)
UL 508

cULus
CSA

4 kV (on contact) conforming to EN/IEC 61000-4-2
8 kV (in air) conforming to EN/IEC 61000-4-2

10 V/m (80 MHz...1 GHz) conforming to EN/IEC 61000-4-3
3 V/m (1.4 GHz...2 GHz) conforming to EN/IEC 61000-4-3
1 V/m (2 GHz...3 GHz) conforming to EN/IEC 61000-4-3

1 kV (Ethernet line) conforming to EN/IEC 61000-4-4
1 kV (serial link) conforming to EN/IEC 61000-4-4
2 kV (power lines) conforming to EN/IEC 61000-4-4

10 V (0.15...80 MHz) conforming to EN/IEC 61000-4-6
3 V (0.1...80 MHz) conforming to 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)) conforming to Marine specification (LR, ABS, DNV, GL)

Conducted emissions - test level: 120...69 dBµV/m QP (power lines) at 10...150 kHz conforming to EN/IEC 55011
Conducted emissions - test level: 63 dBμV/m QP (power lines) at 1.5...30 MHz conforming to EN/IEC 55011
Radiated emissions - test level: 40 dBμV/m QP class A (10 m) at 30...230 MHz conforming to EN/IEC 55011
Conducted emissions - test level: 79...63 dBμV/m QP (power lines) at 150...1500 kHz conforming to EN/IEC 55011
Radiated emissions - test level: 47 dBμV/m QP class A (10 m) at 230...1000 MHz conforming to EN/IEC 55011

10 ms

-10...55 °C horizontal installation
-10...35 °C vertical installation

-25...70 °C

10...95 % without condensation in operation
10...95 % without condensation in storage

IP20 with protective cover in place

2

0...2000 m

0...3000 m

3.5 mm at 5...8.4 Hz on symmetrical rail
3 gn at 8.4...150 Hz on symmetrical rail
3.5 mm at 5...8.4 Hz on panel mounting
3 gn at 8.4...150 Hz on panel mounting

15 gn during 11 ms