Advantech BB-VESR9 Series, User Manual, Page: 17 / 59

VESR9xx Serial Servers
11
CONNECTING THE VESR901
The
VESR901 has one serial connection that supports RS-232, RS-422
and RS-485 (2- and 4-wire). The unit has two connectors: a DB9M
connector and a 5-position terminal block.
If you select RS-232 mode when you configure the serial server, you
must connect the serial device to the serial server via a serial cable. The
VESR901 is a DTE. If the serial device is a DTE, use a null modem
(crossover) cable. If the serial device is a DCE, use a straight-through
cable.
If you select RS-422 mode, RS-485 2-wire mode, or RS-485 4-wire
mode when you configure the serial server, you must connect the serial
device appropriately, via the 5-position terminal block.
Note: Refer to Appendix D for connector pinout information.
VESR901 Connections