Range of product

Modicon M251

Product or component type

Logic controller

[Us] rated supply voltage

24 V DC

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

50 A

Power consumption in W

32.6…40.4 W (with max number of I/O expansion module)

Memory capacity

64 MB for system memory RAM

Data backed up

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

Data storage equipment

<= 16 GB SD card (optional)

Battery type

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

Backup time

2 years at 25 °C

Execution time for 1 KInstruction

0.3 ms for event and periodic task 0.7 ms for other instruction

Application structure

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

Realtime clock

With

Clock drift

<= 60 s/month at 25 °C

Integrated connection type

USB port with mini B USB 2.0 connector Non isolated serial link serial with RJ45 connector and RS232/RS485 interface Dual-port Ethernet 1 with RJ45 connector Ethernet port Ethernet 2 with RJ45 connector

Supply

(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 bus length of 3 m for USB

Communication port protocol

USB port: USB - SoMachine-Network Non isolated serial link: Modbus master/slave - RTU/ASCII or SoMachine-Network

Port Ethernet

Ethernet 1 marking 10BASE-T/100BASE-TX - 2 copper cable Ethernet 2 marking 10BASE-T/100BASE-TX - 1 copper cable

Web services

Web server

Communication service

Downloading IEC VAR ACCESS Modbus TCP client Modbus TCP server Modbus TCP slave device Monitoring NGVL Programming Updating firmware SMS notifications DHCP client (Eth1) DHCP server (Eth2) Ethernet/IP originator (Eth2) Ethernet/IP target (Eth1, Eth2) Ethernet/IP scanner (Eth2) Modbus TCP I/O Scanner and Messaging (Eth2) FDR FTP client/server SNMP 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

Maximum number of connections

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

Number of slave

16 EtherNet/IP: 64 Modbus TCP:

Cycle time

10 ms 16 EtherNet/IP 64 ms 64 Modbus TCP

Local signalling

1 LED (green) for PWR 1 LED (green) for RUN 1 LED (red) for module error (ERR) 1 LED (red) for I/O error (I/O) 1 LED (green) for SD card access (SD) 1 LED (red) for BAT 1 LED (green) for SL 1 LED (red) for bus fault on TM4 (TM4) 1 LED (green) for Ethernet activity (ETH1) 1 LED (green) for Ethernet activity (ETH2)

Electrical connection

removable screw terminal blockpower supply (pitch 5.08 mm)

Insulation

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

Marking

CE

Surge withstand

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

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

height

90 mm

Depth

95 mm

Width

54 mm

Net weight

0.22 kg

Standards

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

product certifications

cULus CE UKCA DNV-GL ABS LR

Resistance to electrostatic discharge

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

Resistance to electromagnetic fields

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

Resistance to fast transients

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

Resistance to conducted disturbances

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)

Electromagnetic emission

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

Immunity to microbreaks

10 ms

Ambient air temperature for operation

-10…35 °C (vertical installation) -10…55 °C (horizontal installation)

Ambient air temperature for storage

-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...2000 m

Storage altitude

0…3000 m

Vibration resistance

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

Shock resistance

15 gn for 11 ms

Unit Type of Package 1

PCE

Number of Units in Package 1

1

Package 1 Height

10.511 cm

Package 1 Width

11.725 cm

Package 1 Length

17.063 cm

Package 1 Weight

371.0 g

Unit Type of Package 2

S03

Number of Units in Package 2

10

Package 2 Height

30 cm

Package 2 Width

30 cm

Package 2 Length

40 cm

Package 2 Weight

4.651 kg

Unit Type of Package 3

P06

Number of Units in Package 3

80

Package 3 Height

75.0 cm

Package 3 Width

40.0 cm

Package 3 Length

80.0 cm

Package 3 Weight

48 kg

Warranty

18 months