The B&R 3IF661.9 Communication Module is an interface module used to connect a B&R 2005 PLC to a PROFIBUS DP network as a slave.

PROFIBUS DP (Decentralized Peripherals) is a widely used communication protocol for industrial automation applications.

It allows devices to exchange data with a central controller. The RS485 interface on the 3IF661.9 module enables serial communication between the PLC and other devices on the PROFIBUS network.

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