34 CI/FSV/FSS/430/450-EN Rev. G | VortexMaster FSV430, FSV450 SwirlMaster FSS430, FSS450
Low flow cut-off
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
max
, current output = 20 mA
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.
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
software:
— 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 ANALOG INPUT+ / ANALOG INPUT-
Operating voltage 16 ... 30 V DC
Input current 3.8 ... 20.5 mA
Equivalent resistance 90 Ω
G11772-01
EXT.
METER +
P/N :
USE WIRING RATED
5ºC MIN. ABOVE MAX.
AMBIENT TEMPERATURE
+
–
TEST PWR/COMM
+
–
1
23
4
USE WIRING RATED
5ºC MIN ABOVE MAX
AMBIENT TEMPERATURE
P/N:XXXXXXXXXXXX
DIGITAL
OUTPUT+
DIGITAL
OUTPUT–
PWR / COMM.
TEST
EXT
METER+
+
–
ANALOG INPUT
NAMUR-YES
NAMUR-NO
+
-
+
-
5
3
2
4
1
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
G11770
20 mA
4mA
Q
max
1
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