Connecting To Com2 And Com3; Connecting - Emerson FB1100 Instruction Manual

Emerson FB1100 Flow Computer Instruction Manual
D301752X012
July 2017
2.13.2

Connecting to COM2 and COM3

COM2 and COM3 operate identically. Each can be configured for either RS-232 or RS-485
communication.
When connecting COM2 or COM3 to an RS-232 port on another device (a PC or another
controller/flow computer) use a cable with configurations as shown in
Figure 2-29: Connecting a Device to COM2 or COM3 Using RS-232

COM2 does not have its own GND terminal. Use either GND terminal on the COM1 terminal
block.

COM3 does not have its own GND terminal. Use either GND terminal on the COM1 terminal
block.
38
Figure 2-29:
RS-232 Port
(COM2) on
FB device
RS-232 Port
on external device
RS-232 Port
on external device
RS-232 Port
(COM3) on
FB device
Installation