Owner`s manual

Connector Configurations Page A-7
AM-6000 Computer Owner's Manual, Rev. 00
RS-232 RJ-45 TO DB-25 CABLES FOR TERMINALS AND PRINTERS
The following table shows the signal-to-pin orientation of each of the AM-6000's four on-board serial
I/O connectors. Note that this particular cable uses an RJ-45 to RJ-45 patch cord, and a DB-25
connector adapter to interface to the terminal or printer. The AM-359 serial I/O paddle cards can use an
identical cable when required.
Computer End RJ-45 Patch Cord
Terminal or Printer
DB-25 Adapter
SIGNAL PIN# DIRECTION PIN# DIRECTION PIN# SIGNAL
RXD 5
←
5
←
2 TXD
RTS 4
→
4
→
5 CTS
TXD 3
→
3
→
3 RXD
DTR 6
→
6
→
8 DCD
CTS 2
←
2
←
20 DTR
GND 7
←
7
←
7 GND
DCD 8
←
8
←
4 RTS
Shld GND 1
←
1
←
1 Shld GND
Table A-5: RS-232 RJ-45 to DB-25 Connector Signals
The patch cords should be internally twisted-pair cable with RJ-45 connectors on both ends. The pin
assignments are straight through (pin-for-pin) with no swapped ends.
Alpha Micro also offers a pre-made cable featuring an RJ-45 connector on one end and a standard
female DB-9 connector on the other end. For more information on RJ-45 cable adapters and types, refer
to the AM-359 product installation instructions (PDI-00359-00). The AM-359 PDI has details on the
cables and adapters available from Alpha Micro to interconnect just about any serial device to these
ports.