Lantronix XPress-DR Plus Quick Start Manual - page 4
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W W W . L A N T R O N I X . C O M
Q u i c k S t a r t G u i d e
XPress-DR+
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PINOUTS CONTINUED…
PINOUTS CONTINUED
Note:
Termination resistors (R = 120 Ohm) are used to match impedance of a node to
the impedance of the transmission (TX) line.Termination resistors should be placed only
at the extreme ends of the TX data lines, and no more than two terminations should be
placed in any single segment of an RS-485 network.The terminator resistors may not be
needed for your application.
9-Pin RS-232 to Serial RJ45
The included Lantronix P/N (500-103) RJ45-DB9F serial cable assumes you are
connecting a typical PC Com port to the XPress-DR+ serial port. This cable is
pinned to provide full serial line control to an RS232 DTE device. Lantronix offers
a comprehensive list of cables and adapters to simplify device connectivity to
the XPress-DR+. See the User Guide for a full listing.
Screw Terminal Serial Connectors
Serial Screw Terminal Pinout for RS422 (4-Wire)
Serial Screw Terminal Pinout for RS485 (2-Wire)
Serial Screw Terminal Pinout for RS485 (2-Wire)
9-Pin RS-232 to Serial RJ45 Pinout Table