Emerson FB1200 Instruction Manual page 47

Emerson FB1200 Flow Computer Instruction Manual
D301782X012
July 2017
When connecting COM1 to another device using RS-485, use a cable with configurations as shown
in Figure 2-29:
Figure 2-29: Connecting a Device to COM1 Using RS-485
Note: Cable for units with optional I/O shown on top; cable for units without optional I/O shown
below.
RS-485 Port
(COM1)
on FB device
RS-485 Port
on external device
RS-485 Port
(COM1)
on FB device
RS-485 Port
on external device
Regardless of the interface standard (RS-232, RS-422, or RS-485) you must use FBxConnect to
configure the port for proper usage.
Installation 41