Siemens CM 1242-5 Communication moduleProduct Overview The CM 1242 5 is a communication module designed to connect SIMATIC S7 1200 controllers to PROFIBUS DP networks as a slave module. This module enables seamless integration of S7 1200 systems into existing PROFIBUS infrastructures, providing reliable data transmission and communication capabilities. Key Features PROFIBUS DP Communication Connects SIMATIC S7 1200 to PROFIBUS as DP slave module Supports transmission rates from 9. 6 kbit