Emerson FB2100 Flow Computer Instruction Manual
D301783X012
March 2019
30
Installation
2.9
Power Modes
To keep power consumption to a minimum, especially for remote sites, the FB2100 can run in two
different power modes
–
Low Power Mode (4 MHz or 8 CPU MHz clock speed) or Standard Power
Mode (60 MHz CPU clock speed).
Low Power Mode
The FB2100 normally runs in low power mode for typical metering applications. The radio Power
Control function (configurable in FBxConnect) switches the flow computer into standard power
mode at specific times when serial communications are required, then it reverts to low power
mode when the communication period is over. A serial connection to a remote 4088B MVT can
occur in low power mode.
The local display (HMI module) with FBxWifi uses additional power. You can configure it in
FBxConnect to shut down after a period of inactivity.
Table 2-4. Typical Power Usage
–
Low Power Mode at Room Temperature
Description
Power Usage
(mW) at 12Vdc
Base flow computer with integral multivariable DP and pressure sensor and
temperature measurement, single DO available, for a single meter run
Historical configuration supports maximum of:
▪
4 averages
▪
12 Station 1 history points (Group 4)
▪
10 User Periodic history points (Group 1)
55
Base flow computer with integral multivariable DP and pressure sensor and
temperature measurement, 2 digital and 2 analog channels available for a
single meter run
Historical configuration supports maximum of:
▪
4 averages
▪
12 Station 1 history points (Group 4)
▪
10 User Periodic history points (Group 1)
67
Additional Load Options:
Display and backlight active
340
FBxWifi active
379
FBxWifi and display active
398
DO active (1 Hz, 50:50 duty cycle, no load)
12
PI active (10 KHz, 50:50 duty cycle, square wave)
12
