Emerson FB1100 - Communications

FB1100 Flow Computer Instruction Manual
D301752X012
November 2023
Introduction 7
Important
Use only batteries supplied with the flow computer or sold by Emerson Energy and
Transportation Solutions as spare parts for this flow computer. If you substitute a battery
you obtain elsewhere you will void your certification unless it is the identical part
from the same manufacturer as that supplied with the flow computer from Emerson.
Table 1-2. Power Options
Option
Usage
External DC Power Supply
5.7 Vdc to 30 Vdc external supply (Max power at 10 watts)
Lead Acid Battery Pack

6.0 Vdc

4.5Ah

Not suitable with ATEX or IECEx applications
Can be optionally charged by a 6-watt solar panel
Lithium Battery Pack

10 Vdc

41 Ah (approximate)

Not suitable with ATEX or IECEx applications

Required when using autonomous measurement
mode
In autonomous measurement mode allows operation for
one year
Communications
The flow computer includes three serial communication ports. The serial ports allow
communication using DNP3, Modbus, BSAP, and ROC protocols.
Table 1-3. Communication Ports
Port
Type
Usage
COM1

Serial communications

Software-selectable for RS-232, RS-
485 (2-wire), RS-485 (4-wire)
operation

4-wire
RS-232, RS-485 (2-wire), RS-485 (4-
wire) communication to host or
other devices. 4-wire used with
external radio.
Note: Under older standards RS-
485 (4-wire) is identified as RS-
422.
COM2

Serial communications

Software-selectable for RS-232, or
RS-485 (2-wire) operation

2-wire
RS-232 or RS-485 (2-wire)
communication to host or other
devices.