Emerson Rosemount 700XA Reference Manual page 135

July 2020
Procedure
1. Start MON2020 and connect to the GC.
2. Select I/O Cards from the Tools menu.
The I/O Cards window displays.
3. Identify the appropriate card slot under the Label column and then select Communications module - RS422/485 from the
appropriate Card Type drop-down list.
Figure 92: MON2020 I/O Cards
4. Click OK.
5. Turn off the GC.
6. Install the RS485/RS422 serial port card into the appropriate expansion slot in the GC's card cage.
7. Replace the card cage cover, local operator interface (LOI) board, and enclosure cover. Start the GC.
Configuring the optional RS485 serial port to function as an RS422 serial port
See Table 8 for the correct jumper settings to configure the optional RS485 serial port to function as an RS422 serial port:
Table 8: Configuring the Serial Connections for RS485/RS422 Serial Communications
Jumpers
J3
J5
J4
J6
TB1 wire terminals
A
B
Y
Z
Rosemount 700XA
RS485 (half duplex/2-wire)
Half
Half
Termination IN
In
In
RS485 (half duplex/2-wire)
RxTx+
RxTx-
NC
NC
RS422 (full duplex/4-wire)
Full
Full
Termination OUT
Out
Out
RS422 (full duplex/4-wire)
Rx+
Rx-
Tx+
Tx-
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