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CONNECTING VESR9XX SERIAL SERVERS TO SERIAL DEVICES
VESR9xx Serial Servers can be configured to connect to serial devices using RS-232,
RS-422, RS-485 2-wire and RS-485 4-wire.
RS-232
connections support eight signal lines plus Signal Ground. Signals are single
ended and referenced to Ground. Default communications parameters are 9600, 8,
N, 1 and no flow control implemented.
RS-422
connections support two signal pairs: TDA (-), TDB (+), RDA (-), RDB (+) and
GND. The data lines are differential pairs (A & B) in which the B line is positive
relative to the A line in the idle (mark) state. Ground provides a common mode
reference.
RS-485
connections support 2-wire or 4-wire operation.
When configured for
4-wire operation
the connection supports two signal pairs: TDA
(-), TDB (+), RDA (-), RDB (+) and GND. This makes full-duplex operation possible. The
data lines are differential pairs (A & B) in which the B line is positive relative to the A
line in the idle (mark) state. Ground provides a common mode reference.
When configured for
2-wire operation
the connection supports one signal pair: Data
A (-) and Data B (+) signal channels using half-duplex operation. The data lines are
differential with the Data B line positive relative to Data A in the idle (mark) state.
Ground provides a common mode reference.
Содержание VESR901
Страница 1: ...VESR9xx Serial servers...
Страница 51: ...51 APPENDIX C DIMENSIONAL DIAGRAMS Dimensional Diagram of a VESR901 Serial Server...
Страница 52: ...52 Dimensional Diagram of a VESR902D Serial Server...
Страница 53: ...53 Dimensional Diagram of a VESR902T Serial Server...
Страница 54: ...54 Dimensional Diagram of a VERR92x Serial Server...
Страница 56: ...56 Terminal RS 422 485 4 Wire RS 485 2 Wire A TDA Data A B TDB Data B C RDA D RDB E GND GND...