Grundfos CUE Series User Manual

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12. Priority of settings
The CUE can be controlled in various ways at the same time.
If two or more operating modes are active at the same time,
the operating mode with the highest priority will be in force.
12.1 Control without bus signal, local operating mode
Example: If an external signal has activated the operating mode
Max., it will only be possible to stop the pump.
12.2 Control with bus signal, remote-controlled
operating mode
Example: If the bus signal has activated the operating mode
Max., it will only be possible to stop the pump.
13. External control signals
13.1 Digital inputs
The overview shows functions in connection with closed contact.
The same function must not be selected for more than one input.
See fig. 21.
13.2 External setpoint
The setpoint can be remote-set by connecting an analog signal
transmitter to the setpoint input (terminal 53).
Open loop
In control mode Open loop (constant curve), the actual setpoint
can be set externally within the range from the min. curve to the
setpoint set via the CUE menu. See fig. 56.
Fig. 56 Relation between the actual setpoint and the external
setpoint signal in control mode Open loop
The On/Off button has the highest priority. In "off"
condition, pump operation is not possible.
Priority CUE menu External signal
1Stop
2Max.
3 Stop
4
Max.
5 Min. Min.
6 Normal Normal
Priority CUE menu External signal Bus signal
1Stop
2Max.
3 Stop Stop
4
Max.
5
Min.
6
Normal
Terminal Type Function
18 DI 1 • Start/stop of pump
19 DI 2
•Min. (min. curve)
•Max. (max. curve)
• Ext. fault (external fault)
• Flow switch
•Alarm reset
• Dry running (from external sensor)
• Not active.
32 DI 3
•Min. (min. curve)
•Max. (max. curve)
• Ext. fault (external fault)
• Flow switch
•Alarm reset
• Dry running (from external sensor)
• Not active.
On/On/
Off
33 DI 4
• Min. (min. curve)
• Max. (max. curve)
• Ext. fault (external fault)
• Flow switch
•Alarm reset
• Dry running (from external sensor)
• Accumulated flow (pulse flow)
• Not active.
Terminal Type Function
53 AI 1 • External setpoint (0-10 V)
TM03 8856 2607
Terminal Type Function
Setpoint
Max. curve
Setpoint, CUE menu
Min. curve
Ext. setpoint signal
Actual setpoint
010 V
Actual
setpoint
range
Grundfos.bk Page 39 Friday, July 30, 2010 10:10 PM

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