The Siemens 6ES7277-0AA22-0XA0 is an EM 277 PROFIBUS-DP slave communication module for the SIMATIC S7-200 series. It connects an S7-200 CPU as a DP slave to a PROFIBUS network, enabling data exchange with a PROFIBUS-DP master. This module is not compatible with S7-200 SMART controllers.
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