RS-232↔IEEE 488 INTERFACE CONVERTER
3.8.1RS-232/RS-422 SIGNAL LEVEL SELECTION
The interface converter’s factory default signal levels are compatible with RS-232. To select RS-422 levels, carefully remove the 8-position shorting plug with a small flat blade screwdriver from J106. Install the DIP jumper into J205 making certain that all of the pins on the shorting plug are inserted correctly.
Shorting Plug
RS-422 RS-232
Figure 3-15. Selecting RS-232 or RS-422 Signal Levels.
3.8.2SERIAL SIGNAL DESCRIPTIONS
The interface converter is equipped with a standard DB25 female connector on its rear panel and requires a standard DB25 male mating connector. The interface converter’s connector is configured as DCE type equipment for RS-232 communications, which means the interface converter always trans- mits data on Pin 3 and receives the data on Pin 2. The following lists and describes the RS-232 and RS-422 signals provided on the interface converter.
