Schneider Modicon M251 Distributed PLC TM251MESE/MESC Multi-Bus Controller

Modicon M251 Series

Schneider PLC Modicon M251 Full Series.

Item	Content
Power Supply	Rated DC24V wide input: 20.4VDC～28.8VDC(19~30VDC)；No AC power option, built-in DC24V sensor power terminal, power consumption:32.6~40.4W
Onboard Discrete I/O	CPU main body has no fixed onboard DI/DO; all I/O realized via external TM2/TM3 expansion modules; core model: TM251MESE / TM251MESCSchneider Electric
Max Total Discrete I/O	Max total 504 points DI+DO (local+remote full expansion configuration)
Max Analog I/O	Max total 120~128 channels AI+AO via TM3 analog expansion modules
Max Expansion Quantity	1. Local I/O(TM2/TM3): Max 7 pcs local expansion modules 2. Remote I/O via TM3XREC1: Extra max 7 pcs remote TM3 modules, total max 14 TM3 I/O modules 3. TM4 communication bus module: Max 3 pcs local bus expansion
Built-in Communication Interfaces	• Universal standard: Mini-B USB2.0(program download)+RS232/RS485 Modbus RTU • TM251MESE: Dual RJ45 Ethernet Switch(Modbus TCP/EtherNet/IP,10/100Mbps) • TM251MESC: Dual Ethernet + Built-in CANopen Master bus(max 64 CANopen slave nodes) Expandable via TM4 modules: Profinet, EtherCAT etc.Schneider Electric
Memory Parameter	Program memory:8MB; System RAM:64MB; Built-in Flash 128MB; External SD card slot(max 32GB for data log/backup)
Operating Temperature	Standard: 0℃ ~ +55℃
Protection Grade	IP20, standard DIN rail mounting
Programming Software	EcoStruxure Machine Expert (IEC61131-3: LD/FBD/ST/SFC/IL)