Emerson FB2100 Flow Computer Instruction Manual
D301783X012
March 2019
Installation
31
Important
If you increase the number of history points/averages beyond any of the maximum limits in
Table 2-
4
,
the flow computer cannot operate in low power mode and automatically runs in standard power
mode.
Standard Power Mode
When serial communication is active (other than to a remote 4088B MVT) the FB2100 operates in
standard power mode. The unit also uses standard power mode when:
▪
The HMI module display is ON
▪
Wi-Fi is active
▪
Modbus Master communication is active
▪
Power control zone enabled
Table 2-5. Typical Power Usage
–
Standard Power Mode at room temperature
Description
Power Usage
(mW) at
12Vdc
Power Usage
(mW) at
24Vdc
Base flow computer with integral multivariable DP and pressure
sensor and temperature measurement for a single meter run
240
290
Base flow computer with temperature measurement (no integral
sensor) communicating to remote 4088B (externally powered)
for a single meter run
220
268
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
260
313
Base flow computer with temperature measurement, integral
static pressure sensor and pulsed input for a single meter run
276
330
Additional Load Options:
Display and backlight active
159
188
FBxWifi active
191
202
FBxWifi and display active
233
245
DO active (1 Hz, 50:50 duty cycle, no load)
20
23
PI active (10 KHz, 50:50 duty cycle, square wave)
14
15
