Emerson FB1200 - Connecting a Device to COM2 or COM3 Using RS-485 (with Optional I;O)

Emerson FB1200 Flow Computer Instruction Manual
D301782X012
March 2019
Installation 47
Figure 2-33: Connecting a Device to COM2 or COM3 Using RS-485 (with optional I/O)
1
RS-485 port (COM2) on FB device
2
RS-485 port (COM3) on FB device
3
RS-485 port on external device
Note
COM3 does not have its own GND terminal. Use either GND terminal on the COM1 terminal block.