Description
Schneide TM251MESE
It is a Schneider Electric Modicon M251 series programmable logic controller (PLC), which adopts modular design. The main body has no built-in I/O points and needs to be expanded through modules to realize its functions.

Hardware Features
- 
Network Interfaces - Equipped with two Ethernet ports:
- Ethernet1_1/1_2: Supports 100Mbps switching function, enabling distributed network connectivity.
- Ethernet2: Supports field bus protocols such as Modbus TCP.
 
- Additional Mini-B USB port (for firmware updates) and SD card slot (up to 16GB capacity).
 
- Equipped with two Ethernet ports:
- 
Expandability - Compatible with TM3/TM2 series I/O modules (right-side expansion) and TM4 series modules (left-side expansion), supporting digital, analog, and high-speed counter modules.
 
- 
Physical Specifications - Dimensions: 95mm (H) × 54mm (W).
- Operating voltage: DC 24V, power consumption ≤5W.
- Environmental adaptability: Operating temperature -20℃~60℃, IP20 protection rating (main unit).
 
Functions and Protocols
- Programming and Storage: Complies with IEC 61131-3 standards, with program capacity up to 8K steps and expandable storage via SD card.
- Communication Protocols:
- Modbus TCP (Master/Slave), FTP Client/Server, SQL Client, etc.
- Supports up to 16 EtherNet/IP target connections and 8 Web server connections.
 
- Safety Certifications: Meets UL508, CE, CSA standards, and electromagnetic compatibility (EN 61000-4-3).
Application Scenarios
Primarily used for distributed network control, device interconnection, and industrial automation systems requiring high flexibility, such as production line control and data acquisition.
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