Grundfos Control MPC 2000 Series, Installation And Operating Instructions Manual

Page: 48 / 528

English (GB)
48
8.7.29 Functions of digital inputs (4.3.7.1)
Fig. 77 Functions of digital inputs
Description
A function can be related to the digital inputs.
Setting range
You can select one function in each display:
See the relevant sections for further information about the
functions.
Generally, a closed contact activates the function selected.
Setting via the operating panel
• Settings > Secondary functions > Stop function > Go to setting
of digital input.
Factory setting
8.7.30 Analog inputs (4.3.8)
Fig. 78 Analog inputs
Description
Each analog input can be activated and related to a certain
function.
As standard, the system has three analog inputs and six inputs
via bus (GENIbus). 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.
Example
AI1 (CU 352) [51]:
Setting via the operating panel
• Settings > Secondary functions > Stop function > Go to setting
of analog input.
Function Contact activated
Not used
Min. duty =
Operating mode
"Min."
Max. duty =
Operating mode
"Max."
User-defined duty =
Operating mode
"User-defined"
External fault = External fault
Dry-running protection = Water shortage
Flow switch = Flow
Resetting of alarm = Alarms are reset
Emergency run =
Operating mode
"Emergency run"
Fault, pilot pump = Fault
Alternative setpoint 2-7 =
The setpoint is
selected
Reduced operation =
Activation of
"Reduced operation"
Stop pump 1-6
=
Forces the pump to
stop
Stop pilot pump
In the display, you can only select pumps defined in
the system.
Digital input Function
DI1 (CU 352) [10]
External start/stop. Open contact = stop.
Note: Input No 1 cannot be changed.
DI2 (CU 352) [12]
Monitoring of water shortage (dry-running
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.
If two sensors are to be redundant, each must have a
separate analog input.
AI1: Analog input No 1
(CU 352): CU 352
[51]:
Terminal No 51