Advantech BB-VESR9 Series, Руководство пользователя

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VESR9xx Serial Servers
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SERIAL INTERFACE MODES
The four serial interface modes of operation are:
RS-232
- Point-to-point serial communications connection used by PC
COM ports and many other systems. Capable of baud rates up to 115.2k
baud over short distances, typically 15m (50 ft). Typically uses DB9
connectors but, a terminal block is also used on Model VESR901.
RS-422 - Point-to-point communications using a Transmit pair and a
Receive pair. RS-422 can operate at higher speeds and longer distances
than RS-232. Typically uses two shielded twisted pairs and screw
terminals but, a DB9 connector is also used on Model VESR901.
RS-485 2-wire - Similar speed and distance specifications as RS-422
but allows multi-drop connections. Typically uses one shielded twisted
pair and screw terminals but, a DB9 connector is also used on Model
VESR901.
RS-485 4-wire - Similar speed and distance specifications as RS-422
but allows full-duplex connections. Typically uses two shielded twisted
pairs and screw terminals but, a DB9 connector is also used on Model
VESR901.
Select the appropriate serial interface mode for the type of connection
between the serial server's serial port and the device connected to it.
Note: Refer to the Appendix D for connector and pin-out details.
SERIAL SERVER NAME
Serial Server Name is a unique name assigned to the serial server. It
must be a valid hostname as defined by RFC-952 and RFC-1123. The
rules are:
• It must consist only of the characters "A" to "Z", "a" to "z", "0" to
"9" or "-"
• It can start or end with a letter or a number, but it must not start
or end with a "-".
• It must not consist of all numeric values.