Emerson FB3000 Instruction Manual page 38

Emerson FB3000 RTU Instruction Manual
D301851X012
October 2022
When connecting COM1 to another device using RS-485 (2-wire), use a cable with configurations
as shown in
Figure 2-22. COM1 Configured as RS-485 (2-wire)
1
2
Regardless of the interface standard – RS-232, RS-485 (4-wire), or RS-485 (2-wire) – you must use
FBxConnect to configure the port for proper usage.
28
Figure 2-22:
RS-485 (2-wire) port on device
Connect cable shields to suitable Instrument Earth connection point
Installation