Emerson FB1200 - Page 48

Emerson FB1200 Flow Computer Instruction Manual
D301782X012
March 2019
42 Installation
Figure 2-28: Connecting a Device to COM1 Using RS-232
1
RS-232 port (COM1) on FB device
2
RS-232 port on external device
When connecting COM1 to another device using RS-422, use wiring as shown in Figure 2-29.
Note
The upper portion of Figure 2-29 shows wiring for units with optional I/O; the lower portion shows
wiring for units without optional I/O.