Grundfos CME Installation And Operating Instrictions

27
English (US)
13.2 Digital input
By means of the R100, one of the following functions can be
selected for the digital input:
• Normal duty
•Min. curve
•Max. curve
• External fault
• Flow switch
• Dry running.
Functional diagram: Input for digital function
14. External setpoint signal
The setpoint can be remote-set by connecting an analogue signal
transmitter to the input for the setpoint signal (terminal 4).
Fig. 38 Actual setpoint as a product (multiplied value) of
setpoint and external setpoint
Select the actual external signal, 0-10 V, 0-20 mA, 4-20 mA, via
the R100. See section 10.3.3 External setpoint on page 17.
If control mode uncontrolled is selected by means of the R100,
the pump can be controlled by any controller.
In control mode controlled, the setpoint can be set externally
within the range from the lower value of the sensor measuring
range to the setpoint set on the pump or by means of the R100.
Fig. 39 Relation between the actual setpoint and the external
setpoint signal in control mode controlled
Example: At a sensor
min
value of 0 psi, a setpoint set of 50 psi
and an external setpoint of 80 % (an 8V analog signal to Terminal
4 if using an analog signal of 0-10 V), the actual setpoint will be
as follows:
In control mode uncontrolled, the setpoint can be set externally
within the range from the min. curve to the setpoint set on the
pump or by means of the R100. Typically the setpoint is set to
100 % when the control mode is uncontrolled
(see section 10.5 Typical display settings for analog-input E-
pumps on page 24).
Fig. 40 Relation between the actual setpoint and the external
setpoint signal in control mode uncontrolled
Digital function
(terminals 1 and 9) (terminals 9 and 10) (terminals 9 and 11)
Normal duty
Min. curve
Max. curve
External fault
Flow switch
Dry running
TM03 8601 2007
Q
H
Q
H
Q
H
Q
H
5 s
delay
Q
H
5 s
5 s
delay
Q
H
Setpoint
External setpoint
Actual setpoint
TM02 8988 1304
Actual
setpoint
= (setpoint - sensor
min
) x %
external setpoint
+ sensor
min
= (50 - 0) x 80 % + 0
=40 psi
TM02 8988 1304
0 10 V
0 20 mA
4 20 mA
Actual setpoint
Sensor
max
Setpoint set by means of
control panel, R100 or PC Tool
E-products
Sensor
min
External setpoint signal
Actual
setpoint
0 10 V
0 20 mA
4 20 mA
Actual setpoint
Max
curve
Setpoint set by means of
control panel, R100 or PC Tool
E-products
Min
curve
External setpoint signal
Actual
setpoint

Grundfos CME Specifications

General

Liquid temperature range	0 °C to +60 °C
Maximum operating pressure	10 bar
Series	CME
Frequency	50/60 Hz
Max Pressure	10 bar
Pump Type	Centrifugal
Material	Stainless steel
Applications	pressure boosting, irrigation
Pumped liquid	Clean water
Approvals	CE
Max Liquid Temperature	60°C
Power Supply	1-phase or 3-phase