3: Installation and Hardware
XPress™ DR+ Industrial Device Server User Guide
22
9-Pin RS-232 to Serial RJ45 Cable (P/N 500-103-R)
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 RS-232 DTE device. Lantronix offers a comprehensive list of cables and adapters to
simplify device connectivity to the XPress DR+ unit. See
C: Lantronix Cables and Adapters
full listing.
Figure 3-6. Lantronix P/N 500-103-R RJ45-DB9F Serial Cable Pinout
8 CTS (In)
1 RTS (Out)
1 DCD (In)
2 DTR (Out)
6 DSR (In)
3 TXD
2 RXD (In)
4 Signal Ground
5 Signal Ground 5 Signal Ground
3 TXD (Out)
6 RXD
4 DTR (Out)
7 DSR (In )
7 RTS (Out)
8 CTS (In)
DTE, 9-Pin
XPress DR+
Female
Serial RJ45
Ethernet Interface
The XPress DR+ includes a two-port unmanaged Ethernet switch with a future option to migrate
to a managed solution.
The internal IEEE 802.3-compliant Ethernet switch is non-blocking, using a 1K MAC address
lookup table with store-and-forward architecture. The XPress DR+ supports auto-negotiation for
10Base-T or 100Base-TX in full and half-duplex modes, as well as automatic MDI/MDIX
crossover, allowing use of both straight-through and crossed Ethernet cables.
Table 3-4. Ethernet Interface Signals
Pin
Direction Name Function
TX+ Out
1
Transmit Data +
TX-
Out
2
Transmit Data -
RX+ In
3
Differential Ethernet Receive Data +
RX- In
6
Differential Ethernet Receive Data -