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, with 512 MB capacity, is available for: v application backup v program transfer v data logging v irmware updating Communication modules (1) 2 communication module models are available: v The TM4ES4 Ethernet switch module v The TM4PDPS1 Profibus DP slave 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). 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 PROFIBUS DP slave module v The TM4PDPS1 communication module can be used to configure a Master connection on the PROFIBUS DP bus. (1) For the rules for combining ModiconTM4 communication modules and Modicon M251 logic controllers, see page 12. M251 logic controller Communication modules Industrial SD memory card 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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