ABB VortexMaster FSV430 Commissioning And Safety Instruction page 34

Low flow cut-off
20 mA
4 mA
1
Fig. 37: Behavior of the current output
1 Low flow
The current output behaves as shown in the figure.
Above the low flow, the current curve proceeds as a straight
line in accordance with the flow rate.
— Flow rate = 0, current output = 4 mA
— Flow rate = Q , current output = 20 mA
max
If the low flow cut-off is activated, flow rates below the low
flow are set to 0 and the current output set to 4 mA.
34 CI/FSV/FSS/430/450-EN Rev. G | VortexMaster FSV430, FSV450 SwirlMaster FSS430, FSS450
Analog input 4 ... 20 mA
Only for devices with HART communication.
A remote transmitter with current output 4 ... 20 mA can be
connected to the analog input:
— Pressure transmitter e.g. ABB model 261 / 266
— Temperature transmitter
— Gas analyzer for the net methane content of biogas
— Density meter or mass meter for a density signal
The analog input can be configured using the relevant
Q
max
software:
G11770
— Input for the pressure measurement for pressure
compensation for the flow measurement of gases and
vapor.
— Input for the return temperature measurement for energy
measurement.
— Input for the net methane content of biogas.
— Input for the density measurement for calculation of the
mass flow.
Analog input 4 ... 20 mA
Terminals
Operating voltage
Input current
Equivalent resistance
1
+
-
5
Fig. 38: Connection of transmitters at the analog input (example)
1 Terminal points in separate cable junction box 2 VortexMaster
FSV430, FSV450 SwirlMaster FSS430, FSS450 3 Power supply
VortexMaster FSV430, FSV450 SwirlMaster FSS430, FSS450
4 Remote transmitter 5Power supply of remote transmitter
ANALOG INPUT+ / ANALOG INPUT-
16 ... 30 V DC
3.8 ... 20.5 mA
90 Ω
4
P/N :
USE WIRING RATED
5ºC MIN. ABOVE MAX.
AMBIENT TEMPERATURE
TEST PWR/COMM
EXT. +
–
METER +
2
+
-
+ +
ANALOG INPUT
USE WIRING RATED PWR / COMM.
–
–
5ºC MIN ABOVE MAX
AMBIENT TEMPERATURE
3
TEST
P/N:XXXXXXXXXXXX
EXT
METER+
DIGITAL NAMUR-NO NAMUR-YES DIGITAL
OUTPUT+ OUTPUT–
1 4
2 3
G11772-01