Emerson FB1200 Quick Start Manual page 22

Flow computer
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FB1200 Flow Computer Quick Start Guide
D301786X012
November 2023
1
RS-485 (2-wire) port (COM3) on FB device
2
RS-485 (2-wire) port on external device
COM3 (Unit does not have optional I/O):
COM3 does not have its own GND terminal. Use either GND terminal on the COM1
terminal block.
1
RS-232 port on external device
2
RS-232-port (COM3) on FB device
20

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