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© Sealevel Systems, Inc. R91001 Manual | SL9211 11/2022
Serial Communications
Connect to a variety of serial peripherals via the Relio R9’s software configurable RS-232/422/485 ports.
The serial port interfaces are available on DB-9 male connectors. Serial 1 and Serial 2 ports are located on
the front of the enclosure, and Serial 3 and Serial 4 ports are located on the right side of the enclosure.