Emerson FB3000 - Page 47

FB3000 RTU Instruction Manual
D301851X012
November 2023
Installation 33
When connecting COM2 to an RS-485 (4-wire) port on another device use a cable with
configurations as shown in Figure 2-24:
Figure 2-24. Wiring COM2 on the CPU Module for RS-485 (4-wire)
1
RS-485 (4-wire) port on device
2
Connect cable shields to suitable Instrument Earth connection point