Measurement-computing Serial488A Manual de usuario Pagina 27

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2.17
RS-232 Signal Levels Selected - Serial488A/OEM
Shorting Plug
J106
J105
RS-232
RS-422
2.8.2 Serial Signal Descriptions
The
Serial488A
is equipped with a standard DB-25S connector on its
rear panel and requires a standard DB-25P mating connector. The
Serial488A
's connector is configured as DCE type equipment for RS-232
communications, which means the
Serial488A
always transmits data on
Pin 3 and receives data on Pin 2. The following list describes the RS-232
and RS-422 signals provided on the
Serial488A
. Note: since the
Serial488/512K
does not support RS-422 communication, the pins labeled
+TxD and +RxD are not used. Any reference to RS-422 communication
does not apply to the
Serial488/512K
.
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