B: Connections and Pinouts
UDS1100 User Guide
72
Figure B-3. DB25 Female Interface RS422 (4 wire mode)
Figure B-4. DB25 Female Interface RS485 (2 wire mode)
Modem Cable
When attaching the DB25 of the UDS to the DB9 com port on a PC, use a
standard straight-through serial cable (Lantronix Part No. 500-163). The figure
below shows the pinouts for a DB25 to DB9 straight-through cable, often referred
to as a "Modem Cable".
To configure the UDS using the DB9 serial port, you need only pin out the TXD,
RXD, and GND signals.
*Optional power connection for non-POE unit.
