Modicon M251 Plc Page 5 Modicon M251 logic controllers

5 Presentation (continued) Modicon M251 logic controllers Options for Modicon M251 logic controllers Options for Modicon M251 controllers Memory card The TMASD1 industrial SD memory card, 256 MB capacity, is available for: v application backup v program transfer v data logging v irmware update Communication modules (1) 2 communication module models are dedicated to Modicon M251 logic controllers: v the TM4ES4 Ethernet switch module v the TM4PDPS1 slave Profibus DP module Modicon TM4 communication modules are assembled by simple interlocking on the left-hand side of the controllers and a bus expansion connector is used to distribute data and the power supply. Up to 3 communication modules can be added on the left of M251 logic controllers. See page 12. b Ethernet switch module v The TM4ES4 module is a 4-port Ethernet interface (10/100 Mbps, MDI/MDIX) with the following protocols: Ethernet Modbus TCP (Client/Server), EtherNet/IP (Adapter/Originator), UDP, TCP, SNMP and SoMachine. v Clipped onto the left-hand side of a Modicon M251 controller, it consists of an autonomous switch with 4 ports, supplied by the Modicon M251 controller. b Slave PROFIBUS DP module v The TM4PDPS1 communication module can be used to configure a Master connection on the PROFIBUS DP bus. (1) For rules for combining Modicon TM4 communication modules and Modicon M251 logic controllers, see page 12. M251 logic controller Communication modules Industrial SD memory card Profibus Ethernet Ethernet 1 Ethernet 2

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