When connecting COM2 to an RS-485 (2-wire) port on another device use a cable with
configurations as shown in
Figure 2-25. COM2 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.
Installation
Figure
RS-485 (2-wire) port on device
Connect cable shields to suitable Instrument Earth connection point
Emerson FB3000 RTU Instruction Manual
2-25:
D301851X012
October 2022
31