| Range Of Product |
Modicon M251 |
| Product Or Component Type |
Logic controller |
| [Us] Rated Supply Voltage |
24 V DC |
| Nb Of I/O Expansion Module |
7 local
14 remote |
| 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 |
8 MB program
64 MB system memory RAM |
| Data Backed Up |
128 MB built-in flash memory backup of user programs |
| Data Storage Equipment |
<= 16 GB SD card optional) |
| Battery Type |
BR2032 lithium non-rechargeable 4 year(s) |
| Backup Time |
2 years 77 °F (25 °C) |
| Execution Time For 1 Kinstr |
0.3 ms event and periodic task
0.7 ms other instruction |
| Execution Time Per Instruction |
0.022 µs |
| Application Structure |
3 cyclic master tasks + 1 freewheeling task
8 event tasks
4 cyclic master tasks
8 external event tasks |
| Realtime Clock |
With |
| Clock Drift |
<= 60 s/month 77 °F (25 °C) |
| Integrated Connection Type |
USB port mini B USB 2.0
Non isolated serial link serial RJ45 RS232/RS485
Dual-port Ethernet RJ45
CANopen J1939 SUB-D 9 |
| 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 9.84 ft (3 m) USB |
| Communication Port Protocol |
USB port USB - SoMachine-Network
Non isolated serial link Modbus master/slave - RTU/ASCII or SoMachine-Network |
| Port Ethernet |
Ethernet 10BASE-T/100BASE-TX - 2 copper cable |
| Web Services |
Web server |
| Communication Service |
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
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 |
| Canopen Feature Profile |
DR 303-1
DS 301 V4.02 |
| Number Of Slave |
63 CANopen |
| Local Signalling |
PWR 1 LED green)
RUN 1 LED green)
Module error (ERR) 1 LED red)
I/O error (I/O) 1 LED red)
SD card access (SD) 1 LED green)
BAT 1 LED red)
Ethernet port activity 1 LED green)
SL 1 LED green)
Bus fault on TM4 (TM4) 1 LED red)
CANopen run 1 LED green)
CANopen error 1 LED green) |
| Electrical Connection |
removable screw terminal block power supply pitch 5.08 mm) |
| Insulation |
Non-insulated between supply and internal logic
Between supply and ground 500 V AC |
| Marking |
CE |
| Surge Withstand |
1 kV shielded cable common mode EN/IEC 61000-4-5
1 kV power lines common mode EN/IEC 61000-4-5
0.5 kV power lines differential mode EN/IEC 61000-4-5 |
| 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 |
3.74 in (95 mm) |
| Width |
2.13 in (54 mm) |
| Product Weight |
0.49 lb(US) (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 1604
UL 508 |
| Product Certifications |
CULus
CSA |
| Resist Electrostatic Dischrg |
8 kV in air EN/IEC 61000-4-2
4 kV on contact EN/IEC 61000-4-2 |
| Resist To Electromagn 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 GHz...3 GHz EN/IEC 61000-4-3 |
| Resistance To Fast Transients |
2 kV EN/IEC 61000-4-4 power lines)
1 kV EN/IEC 61000-4-4 Ethernet line)
1 kV EN/IEC 61000-4-4 serial link) |
| Resist To Conductd Disturbs |
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 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)230…1000 MHz EN/IEC 55011 |
| Immunity To Microbreaks |
10 ms |
| Ambient Air Temp For Op |
14…95 °F (-10…35 °C) vertical installation)
14…131 °F (-10…55 °C) horizontal installation) |
| Ambient Air Temp 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 |
