Modicon M251 Plc Page 7 Modicon M251 logic controllers

7 Presentation (continued) Modicon M251 logic controllers I/O extensions with Modicon TM3 expansion modules I/O extensions with Modicon TM3 modules Modicon TM3 expansion modules Modicon M251 logic controllers have no embedded I/O, yet can still take Modicon TM3 expansion modules for connecting sensors and actuators locally: v digital I/O modules for creating configurations with up to 488 digital I/O v analog I/O modules for creating configurations with up to 114 analog I/O, to receive signals from, for example, position, temperature, and speed sensors and also capable of controlling variable speed drives or any other device with a current or voltage input v Expert modules for controlling TeSys motor-starters, connected with RJ45 cables to simplify wiring of the control section v Functional safety modules that simplify wiring and can be configured in SoMachine In addition, the Modicon TM3 expansion system offers flexibility due to the option to remotely locate some of the Modicon TM3 modules in the enclosure or another cabinet, up to 5 meters (16.404 ft.) away, using a bus expansion system. The Modicon TM3 expansion system is common to the whole range of Modicon M221, M241, and M251 logic controllers, meaning that applications can be upgraded without changing extension. 2 1 5 4 Local I/O < 7 modules max. > 2 3 6 4 Remote I/O < 7 modules max. > 7 24 V c 1 M251 logic controller 2 Modicon TM3 digital I/O modules 3 Modicon TM3 analog I/O modules (1) 4 Modicon TM3 Expert module for controlling TeSys motor-starters 5 Modicon TM3 functional safety modules 6 Modicon TM3 bus expansion modules (transmitter and receiver) 7 Modicon TM3 bus expansion cable (1) Compatibility of expansion module offers: The majority of Modicon TM2 expansion modules can be used with M251 logic controllers. Nonetheless, inserting a Modicon TM2 expansion module in a configuration can increase the expansion module execution times by as much as a few milliseconds. The compatibility of Modicon TM2 expansion modules with M251 logic controllers is described in detail on page 26. 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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