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What is the maximum numbers of IO modules supported with M221 controller

With use of TM3 bus extension modules: TM3XTRA1 – TM3 bus extension transmitter module and   TM3XREC1 - TM3 bus extension receiver
modules maximum 14 numbers of I/O modules ( Digital,Analog, Expert) supported .
Without use of TM3 bus extension modules, 7 numbers of I/O modules (Digital, Analog, Expert) supported
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