Serial Communication Issues

NI CompactRIO Device Drivers Help

Edition Date: December 2017

Part Number: 373197L-01

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The following topics explain some serial communication issues, including duplex architectures, termination methods, bias resistors, and types of connecting equipment.

Duplex Architectures

Full Duplex

Half Duplex

RS485 Termination

Bias Resistors

RS232 DTE versus DCE

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