Emerson Rosemount 700XA Reference Manual page 168

Operation and maintenance
June 2022
10. To learn the location of a switch on the Base I/O board, consult
Figure 5-55: Serial port switches on the base I/O board
11. Make sure that SW12 is set to the down position or Port 0 will not function.
168
Figure 5-54: RS-485 (half duplex/two-wire) switches
Therefore, if you want to set Port 1 to RS-232 mode, you would set channel 2 on
SW13 to the down position.
Reference Manual
2-3-9000-744
Figure 5-55:
Emerson.com/Rosemount