Rockwell Automation Publication 2080-UM002N-EN-E - November 2022 53
Chapter 4 Wire Your Controller
IMPORTANT • Do not connect the GND pin of the serial port to Earth/Chassis Ground.
The GND pin of the serial port is the DC common for the Serial Port
Communication signals and is not intended for Shield Ground.
• If the length of the serial cable is more than 3 meters, use an isolated
serial port, catalog number 2080-SERIALISOL.
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