Grundfos Control MPC Serie Manual De Instrucciones página 77

11. Taking the product out of operation
Switch off the main switch to take the system out of operation.
WARNING
Electric shock
Death or serious personal injury
- Do not touch the conductors in front of the main
switch as they are still energised.
- Lock the main switch with a padlock to ensure that
the power supply cannot be accidentally switched
on.
12. Technical data
12.1 Temperature
Ambient temperature: 0-40 °C.
12.2 Relative humidity
Maximum 95 %.
12.3 Electrical data
Supply voltage
See the nameplate of the system.
Backup fuse
See the wiring diagram supplied with the system.
Digital inputs
Open-circuit voltage: 24 VDC
Closed-circuit current: 5 mA, DC
Frequency range: 0-4 Hz
All digital inputs are supplied with PELV voltage
(Protective Extra-Low Voltage).
Analog inputs
Input current and voltage:
Tolerance:
Repetitive accuracy:
Input resistance, current:
Input resistance, voltage, CU 352:
Input resistance, voltage, IO 351:
Supply to sensor:
All analog inputs are supplied with PELV voltage
(Protective Extra-Low Voltage).
Digital outputs (relay outputs)
Maximum contact load: 240 VAC, 2 A
Minimum contact load: 5 VDC, 10 mA
All digital outputs are potential-free relay contacts.
Some outputs have a common C terminal. For further
information, see the wiring diagram supplied with the
system.
0-20 mA
4-20 mA
0-10 V
± 3.3 % of full scale
± 1 % of full scale
< 250 Ω
50 kΩ ± 10 %
> 50 kΩ ± 10 %
24 V, maximum 50 mA,
short-circuit protected
Inputs for PTC sensor/thermal switch
For PTC sensors to DIN 44082. Thermal switches can also be
connected.
Open-circuit voltage: 12 VDC ± 15 %
Closed-circuit current: 2.6 mA, DC
Inputs for PTC sensors are electrically separated
from the other inputs and outputs of the system.
12.4 Measuring parameters
12.4.1 Transmitter types
The transmitter types in the table below can be used for the
measurement of values in the system.
Abbreviation Transmitter
DPT Differential-pressure transmitter
DTT Differential-temperature transmitter
FT Flow transmitter
LT Level transmitter
PT Pressure transmitter
TT Temperature transmitter
12.4.2 Parameter list
The table below shows which measured values CU 352 can
receive via its analog inputs. Figures
values can be measured.
Number Parameter
1 Flow rate
2 Outlet pressure
3 Differential pressure, external
4 Inlet pressure
5 Differential pressure, pump
6 Differential pressure, inlet
7 Differential pressure, outlet
8 Tank level, outlet side
9 Tank level, inlet side
10 Return-pipe temperature, external
11 Flow-pipe temperature
12 Return-pipe temperature
13 Differential temperature
14 External pressure
15 Series 2000, differential pressure
16 Series 2000, flow rate
17 System pressure
Not shown Ambient temperature*
Not shown 0-100 % signal**
* The ambient temperature is typically the temperature in the
room where Control MPC is located.
** A 0-100 % signal from an external controller. It can for
instance be a 0-10 V signal.
145 to 148 show where the
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