Grundfos CUE Series Product Guide

Functions
Grundfos CUE
28
Predefined ramps (setting via PC Tool)
The ramp-up and ramp-down time can be remote-set
from the default setting to a predefined setting by
means of PC Tool.
For further information, see page 25.
Predefined setpoints (setting via PC Tool)
One to seven predefined setpoints can be selected via
digit
al inputs configured for this purpose.
For further information, see Predefined setpoints on
page 19.
Signal relays
The two relay outputs can be independently set to these
indications:
• ready
•alarm
•operation
• pump running
• warning
• relubricate
• external control (setting via PC Tool)
• limit exceeded (setting via PC Tool).
Ready
The pump is ready to run or running.
Warning
There is a warning.
Alarm
There is an alarm.
Operation
The pump is running or has been stopped by a stop
funct
ion.
Pump running
The pump is running.
Relubricate
Lubrication time is exceeded.
External relay control (setting via PC Tool)
This function offers information, warning or alarm when
a signal is given via GENIbus.
Limit exceeded (set
ting via PC Tool)
This function offers information, warning or alarm when
a low or high limit is exceeded.
Analog inputs
As standard, the CUE offers these analog inputs:
• one analog input for external setpoint
• one analog input for sensor 1.
External setpoint
The setpoint can be influenced by connecting an analog
signa
l to the setpoint input.
For further information, see page 17.
Sensor 1
The sensor 1 is default used for control in closed loop.
In closed loop, the feedback signal is kept at a given
setp
oint by a PID controller.
In open loop, sensor 1 can be used for monitoring.
Analog output
The analog output (0-20 mA) can be set via the PC Tool
to one of these indications:
• feedback value
• speed
• frequency
• motor current
• external setpoint input
• limit exceeded.
The analog output is default set to not active.
Feedback value
The output signal is a function of the actual feedback
value.
Speed
The output signal is a function of the actual pump
speed.
Frequency
The output signal is a function of the actual frequency.
Motor current
The output signal is a function of the actual motor cur-
rent.
External setpoint input
The output signal is a function of the external setpoint
inpu
t.
Limit exceeded
The output signal indicates whether the limit is
exceed
ed:
• Minimum output = limit is not exceeded.
• Maximum output = limit is exceeded.
Default setting is NOT ACTIVE.

Grundfos CUE Series Specifications

General

Category	DC Drives
Output Voltage	24 V DC
Control Signal	0-10 V, 4-20 mA
Communication	Modbus RTU
Protection Features	Overvoltage, overcurrent, overtemperature, short circuit
Humidity	5% to 95% (non-condensing)
Enclosure class	IP20
Enclosure Rating	IP20