Grundfos NBE Series - 7.7.1 Setting two sensors for differential measurement; 7.8 Grundfos Direct Sensor

Unit
Parameter Available units
Pressure bar, m, kPa, psi, ft
Level cm, m, ft, in
Pump flow
m
3
/h, l/s, yd
3
/h, gpm
Liquid temperature °C, °F
Other parameter %
Electrical signal
Available signal types:
• 0.5 - 3.5 V
• 0-5 V
• 0-10 V
• 0-20 mA
• 4-20 mA.
Sensor range, minimum value
Set the minimum value of the connected sensor.
Sensor range, maximum value
Set the maximum value of the connected sensor.
7.7.1 Setting two sensors for differential measurement
Two analog sensors must be installed and connected electrically to
measure a parameter at two different locations in a system.
The pressure, temperature and flow parameters can be used for
differential measurement.
• Set the analog inputs according to the measured parameter:
Parameter
Sensor 1,
measured
parameter
Sensor 2,
measured
parameter
Pressure, option 1 Inlet pressure Discharge press.
Pressure, option 2 Press. 1, external Press. 2, external
Flow Pump flow Flow, external
Temperature Temperature 1 Temperature 2
If you want to use the Con. diff. press., Con. diff.
temp. or Const. flow rate control modes, you must
configure both sensors as Feedback sensor.
7.8 Grundfos Direct Sensor
Pump variant Grundfos Direct Sensor
NBE, NKE, NBSE, VLSE -
NBE, NKE, NBSE Series
2000; VLSE with
Delta ρ sensor
●
8)
8)
Not VLSE with Delta ρ sensor, as it is an analog sensor.
Grundfos Direct Sensor is a digital sensor that auto detects range
and unit.
Grundfos Direct Sensor always has the capability to also measure
the media temperature. The pump will automatically detect range
and unit of the temperature sensor.
For information about the functions and measured parameters of
each sensor, see the sections on the sensor, temperature and dry-
running protection.
Wiring example:
A B
C
D
DI3 AI224V 5V TX RX
TM086416
Designation
Color
A Brown
B Green
C White
D Yellow
Factory setting
See the section on factory settings.
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English (US)