UltraPort Serial Adaptors User Guide
Connector box and cable pinouts Page 125
Chapter 3 Cabling information
DB25 connector box
Note
The UltraPort connector box cable needs to be secured or supported in case
of sudden contact or excessive weight on the cables. Please ensure that
adequate caution is taken to avoid possible damage to the UltraPort card or
Host system. This can be accomplished by securing the cable to a rack or to
the back of the server.
DB25 Pin EIA-232 EIA-422 EIA-485
1 & Shell C-GND C-GND C-GND
2TXD TXD- TXD-/RXD-
3RXD RXD+ RXD+
4RTS RTS- NC
5CTS CTS+ NC
6DSR RXD- RXD-
7S-GND S-GND S-GND
8DCD CTS- NC
20 DTR TXD+ TXD+/RXD+
22 RI RTS+ NC