Each Origin2000 or Onyx 2 system comes with two standard 9-pin serial ports. These ports can support either RS-232 or RS-422 interface devices. Figure B-1 shows the location and pinouts for a serial port. Optional additional serial ports are also available.

Figure B-1. Serial Port Location and Pinouts

This connector departs from traditional Silicon Graphics usage:

Table B-1 shows the correspondence between this connector and the SP connector.

The RS-232 standard recommends the use of cables no longer than 50 feet (15.2 meters). (This standard should also be applied for an RS-422 connector.) Longer runs increases the possibility of line noise which can affect data transmission and cause errors. For cable runs longer than 50 feet (15.2 meters), use an appropriate extender device.

Figure B-2 shows pin numbering for the Origin200 serial port.

Figure B-2. Origin200 Serial Port Pinout Assignments

Table B-2 shows the connector pin assignments for the serial ports in RS-232 mode.

The OCTANE workstation serial ports can operate in RS-232 electrical levels with a standard PC pinout; the range of supported baud rates is 300 baud to 460K baud. Figure B-3 shows pin numbering.

Figure B-3. OCTANE Serial Port

Table B-3 shows cable pinout assignments for the serial ports.

For information on operating the serial ports with Macintosh style electrical levels and a Macintosh-compatible pinout or with ANSI/SMPTE 207M electrical levels and pinout, or for information on connecting a dumb terminal, see the OCTANE Workstation Owner's Guide.