Grundfos Control MPC Montage- Und Betriebsanleitung Seite 50

Factory settings
Digital input Function
External start/stop. Open contact = stop.
DI1 (CU 352) [10]
Note: Input No. 1 cannot be changed.
Monitoring of water shortage (dry-running
DI2 (CU 352) [12] protection). Open contact = water shortage (if
the system is supplied with this option).
Monitoring of water shortage requires a pressure or level
switch connected to the system.
8.6.30 Analog inputs (4.3.8)
Analog inputs
Description
Each analog input can be activated and related to a certain
function.
As standard, the system has three analog inputs. If the system
incorporates an IO 351B module (option), the number of analog
inputs is 5.
All analog inputs are shown so that their physical position in the
system can be identified. A redundant primary sensor can be fitted
as backup for the primary sensor in order to increase reliability and
prevent stop of operation.
If two sensors are to be redundant, each must have a
separate analog input.
Example
AI1 (CU 352) [51]:
AI1: Analog input No. 1
(CU 352): CU 352
[51]: Terminal No. 51
Setting via the operating panel
• Settings > Secondary functions > Stop function > Go to
setting of analog input.
50
8.6.31 Analog inputs (4.3.8.1 - 4.3.8.7)
Analog inputs
Description
In the menu, you can set Analog inputs. Each display is divided
into three parts:
• Setting of input signal, for instance 4-20 mA
• Measured input value, for instance Outlet pressure
• Measuring range of the sensor/signal transmitter, for instance
0-16 bar.
Setting range
You can set the following parameters in each display:
• Not used
• Range of input signal, 0-20 mA, 4-20 mA, 0-10 V
• Measured input value
• Sensor range.
Setting via the operating panel
• Settings > Secondary functions > Stop function > Go to
setting of analog input.
If an analog input is deactivated, the display only shows
the top part, that is the setting of the analog input.
If the input is activated, the middle part, Measured input
value is shown. This makes it possible to relate a function
to the analog input in another display. When the analog
input has been related to a function, CU 352 will return to
the display for setting of analog inputs.
Factory settings
Pressure boosting
Analog input Function
AI1 (CU 352) [51] Outlet pressure
Heating and cooling
Analog input Function
AI1 (CU 352) [51] These are selected in the startup wizard.