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Grundfos Hydro Multi-E User Manual

Grundfos Hydro Multi-E
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Signal range
[V, mA]
Resulting setpoint [%]
0 100
0-10 V 0 V 10 V
0-20 mA 0 mA 20 mA
4-20 mA 4 mA 20 mA
The reading is a percentage of the external setpoint range.
Motor load
Signal range
[V, mA]
Motor load [%]
0 100
0-10 V 0 V 10 V
0-20 mA 0 mA 20 mA
4-20 mA 4 mA 20 mA
The reading is a percentage of the range between 0 and 200 % of
the maximum permissible load at the actual speed.
Motor current
Signal range
[V, mA]
Motor current [%]
0 100 200
0-10 V 0 V 5 V 10 V
0-20 mA 0 mA 10 mA 20 mA
4-20 mA 4 mA 12 mA 20 mA
The reading is a percentage of the range between 0 % and 200 %
of the rated current.
Limit 1 exceeded and Limit 2 exceeded
Signal range
[V, mA]
Limit-exceeded function
Output not active Output active
0-10 V 0 V 10 V
0-20 mA 0 mA 20 mA
4-20 mA 4 mA 20 mA
This function is typically used for monitoring of secondary
parameters in the system. If the limit is exceeded, an output, a
warning or an alarm is activated.
Flow rate
Signal range
[V, mA]
Flow rate [%]
0 100 200
0-10 V 0 V 5 V 10 V
0-20 mA 0 mA 10 mA 20 mA
4-20 mA 4 mA 12 mA 20 mA
The reading is a percentage of the range between 0 and 200 % of
the nominal flow.
Factory settings
See section Factory settings.
Related information
21.6 Factory settings
11.7
External setpoint function
You can influence the setpoint with an external signal via
one of the analog inputs
one of the Pt100/1000 inputs if an advanced functional module
(FM 300) is fitted,
Before you can enable the function, you must set one of
the analog inputs or Pt100/1000 inputs to External
setpoint function.
See sections Analog inputs and Pt100/1000 inputs.
Example with constant pressure with linear influence
Actual setpoint: actual input signal × (setpoint - sensor min.) +
sensor min.
At a sensor min. of 0 bar, a setpoint of 2 bar and an external
setpoint of 60 %, the actual setpoint is 0.6 × (2 - 0) + 0 = 1.2 bar.
100
0
100 %
0
1.2
2
[bar]
0
3.5 V0.5
5 V0
10 V0
20 mA0
20 mA4
-50 204
SP
S
min
SP
a
A
B
S
max
°C
TM064165
Example of setpoint influence with sensor feedback
Pos. Description
A Actual input signal (60 %)
B External setpoint signal
S
max
Sensor max.
SP Setpoint
SP
a
Actual setpoint
S
min
Sensor min.
Example with constant curve with linear influence
Actual setpoint: actual input signal × (setpoint - user-set minimum
speed) + user-set minimum speed.
At a user-set minimum speed of 25 %, and a setpoint of 85 % and
an external setpoint of 60 %, the actual setpoint is 0.60 × (85 - 25) +
25 = 61 %.
30
English (GB)

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Grundfos Hydro Multi-E Specifications

General IconGeneral
Product NameGrundfos Hydro Multi-E
CategoryWater Pump
Pump TypeMulti-stage centrifugal pump
Number of Pumps2-4
Pressure RangeUp to 16 bar
Motor PowerUp to 22 kW per pump
Shaft SealMechanical Seal
Control TypeElectronic
Pump ModelCRE
Power Supply3 x 380-480 V, 50/60 Hz
Max Head160 m
ApprovalsCE
CommunicationModbus, BACnet
Housing MaterialStainless steel
Impeller MaterialComposite
Connection SizeDN32
Motor TypePermanent magnet motor

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