Filter
Top Products
Serial port switches on the Base I/O boardFigure 4-32:
10. Make sure that SW12 is set to the down position or Port 0 will not function.
Note
Ordinarily SW12 should never be adjusted. It is used by the factory for testing purposes. If it
was somehow set to the top, be sure to return it to its factory-set position, which is the down
position.
11. To enable line termination for a serial port, set the appropriate port switch on SW10
to the bottom position.
12. Replace the Base I/O board in the card cage.
13. Consult the following table, which shows the correct termination block wiring for
each mode and port. The first column lists the port number; the first row lists the
communications mode. The table cell at which the desired port and the desired
mode intersect contains the appropriate wiring for that configuration.
Operation and maintenance
4
Operation and maintenance
115