Measurement-computing Serial488A Manuel d'utilisateur télécharger pdf (Page 27)

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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Measurement-computing Serial488A Manuel d'utilisateur Page 27