Analog Inputs (4.3.8); Analog Inputs (4.3.8.1 - 4.3.8.7) - Grundfos Control DDD Montage- Und Betriebsanleitung

8.7.28 Analog inputs (4.3.8)

Fig. 79 Analog inputs
Description
Each analog input of CU 354 and IO 351B can be activated and
related to a certain function.
As standard, the system has five analog inputs.
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 354) [51]:
AI1: Analog input No 1
(CU 354): CU 354
[51]: Terminal No 51
Setting via operating panel
• Settings > Secondary functions > Analog inputs.
42

8.7.29 Analog inputs (4.3.8.1 - 4.3.8.7)

Fig. 80 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 "Discharge pressure"
• measuring range of the sensor or 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 operating panel
• Settings > Secondary functions > Analog inputs.
If an analog input is deactivated, the display will only
show the top part, that is the setting of the analog
input.
If the input is activated, the middle part, "Measured
input value", will be 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 354 will return to the display for setting
of analog inputs.
Factory setting
Analog input Function
AI1 (CU 354) [51] Discharge pressure
AI3 (CU 354) [57] Flow rate 1-3