Emerson FB3000 RTU Instruction Manual
D301851X012
May 2022
Installation
29
Connecting to COM3
COM3 can be configured for RS-485 (2-wire) communication. When connecting COM3 to an RS-
485 port on another device (such as a Rosemount 4088B transmitter), use a cable with
configurations as shown in
Figure 2-23
:
Figure 2-23: COM3 Configured as RS-485 (2-wire) and Connected to a 4088B Transmitter
1
Enable AC termination using switches
2
RS-485 bus; twisted pair required
3
Connect cable shields to suitable Instrument Earth connection point
Summary of Contents for FB3000
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