Emerson Rosemount 700XA Reference Manual page 173

Reference Manual
2-3-9000-744
Install an optional RS-485/RS-422 serial port card
You can install an optional RS-485 board in one or both of the expansion in/out (I/O) slots
provided with the gas chromatograph's (GC's) card cage in the electronics enclosure. You
can configure this card to RS-422 (four wire) or RS-485 (two wire) mode.
RS-485 mode is the default setting. See Emerson.com/ROC800-Series.
Procedure
1. Start Rosemount MON2020 and connect to the GC.
2. Go to Tools → I/O Cards.
3. Identify the appropriate card slot under the Label column and then select
4. Click OK.
5. Turn off the GC.
6. Install the RS-485/RS-422 serial port card into the appropriate expansion slot in the
7. Replace the card cage cover, local operator interface (LOI) board, and enclosure
Configuring the optional RS-485 serial port to function as an
RS-422 serial port
See Table 5-3
to function as an RS-422 serial port:
Rosemount 700XA
The I/O Cards window displays.
Communications module - RS422/485 from the appropriate Card Type drop-down
list.
Figure 5-58: Rosemount MON2020 I/O Cards window
GC's card cage.
cover. Start the GC.
for the correct jumper settings to configure the optional RS-485 serial port
Operation and maintenance
June 2022
173