Emerson FB3000 RTU Instruction Manual
D301851X012
May 2022
32
Installation
Figure 2-26: COM4 Configured as RS-485 (2-wire) and Connected to Multiple 4088B Transmitters
1
Enable AC termination using switches on last multi-dropped 4088B transmitter
2
RS-485 bus; twisted pair required
3
Up to ten 4088B transmitters allowed per port; FB3000 only provides power for a
maximum of four transmitters. Any other transmitters require an external power supply.
When communicating with more than six 4088Bs at 9600 baud, update times exceed once
a second.
4
Connect cable shields to suitable Instrument Earth connection point
Содержание FB3000
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