Schneider Electric TM251MESE Modicon M251 Dual Ethernet Programmable Logic Controller

The Schneider Electric TM251MESE is a Modicon M251 programmable logic controller with two independent Ethernet ports (Ethernet 1 and Ethernet 2), supporting up to 7 local or 14 remote I/O expansion modules. Powered by 24 V DC with a 50 A inrush current and 32.6-40.4 W consumption, it suits applications needing network segregation — one Ethernet port for machine control, the other for plant-level supervision.

Technical Specifications

Certifications & Standards

• CE
• cULus
• UKCA
• DNV-GL
• ABS
• LR
• ANSI/ISA 12-12-01
• CSA C22.2 No 142
• CSA C22.2 No 213
• IEC 61131-2:2007
• Marine specification
• UL 508

Selection Notes

Choose the TM251MESE over a CANopen-equipped variant when the machine needs two separate Ethernet networks instead of a fieldbus — Ethernet 1 handles EtherNet/IP and Modbus TCP device control while Ethernet 2 can be dedicated to plant supervision or a second protocol stack, avoiding network congestion on a single port. Its 7 local / 14 remote expansion-module ceiling matches the CANopen variant, so the choice comes down to fieldbus versus dual-Ethernet architecture.