Grundfos MAGNA3 Bedienungsanleitung Seite 5

SeTTInGS
Analog input
Function of analog input
One of the following two options
can be used for analog input setup.
External sensor feedback
These functions are designed for
the connection of an external
p
sensor feedback.
Dif. pressure
Contant temperature
Heat energy monitor
Dif. temperature
Controller settings (Kp and Ti)
From factory, the analog input function is tailored to a generic heating
Building
Management system with a predefined pipe length and sensor position in the system.
System/PLC
we recommend to use the wizard under "Assist setup, analog input"
if these predefined settings are not applicable.
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(option 1)
From factory, the internal temperature
sensor is used for feedback.
Is automatically activated if an external
temperature sensor is installed
External signal input
(option 2)
The pump receives a signal (0-10 V or 4-20mA)
which influences the setpoint of the pump.
Can be used in the following control modes:
Contant curve
Building
Management
System/PLC
Contant pressure
Poportional pressure
For monotoring the The signal input is an influence on the given setpoint
resulting setpoint, view (manually set by the user). The outcome from these two
the status menu, under factors is the resulting setpoint.
pump performance.
The locally chosen setpoint is used as the 100% reference
according to the influence which the signal input provides.
Example: If the setpoint is set at 4m and the signal input gives
a maximum value (10V or 20mA), the resulting setpoint will be
4 m. If the signal input is reduced by 50%, the resulting setpoint
will change accordingly, in a linear manner between the
minimum and the manually entered setpoint.
For more information regarding setpoint influence,
please see next page.
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