Grundfos CU 362 Instrucciones De Instalación Y Funcionamiento página 7

4. Installation preparation
Before installation, check the following:
• Do the specifications of the Dedicated Controls system
correspond to the order?
• Are all visible parts intact?
4.1 Mechanical installation
This section describes the mechanical installation of the Dedicated
Controls control cabinet and also provides general advice about
how to position sensors in order to achieve stable measured values.
4.1.1 Dedicated Controls
The control cabinets incorporate a CU 362 control unit connected to
one or two IO 351B modules. An optional IO 113 sensor module
can be connected to each pump.
Example of Dedicated Controls control cabinet
The CU 362 is the "brain" of the system and must be incorporated
in all systems. The units in the system can be combined in different
ways according to the user's needs.
The control system controls the pumps by means of contactors and
IO 351B modules. Contactors, cables and other high-voltage
components should be positioned as far away as possible from the
control system and the signal cables.
The control system is operated via a user-friendly control panel on
the CU 362 or via a PC. Wireless remote control is available
throughout the world, using a PC or mobile phone. The control
system can be integrated into a user's existing SCADA system.
A specially developed PC program can be used to configure and
subsequently monitor and maintain the system.
The control system can communicate in many different ways, for
example with a SCADA system. Grundfos offers various fieldbus
CIM communication modules that can be fitted in the CU 362. The
type of protocol and line carrier being used must be taken into
consideration when selecting the correct module.
4.1.2 Sensors
The Dedicated Controls system requires correctly measured values
in order to give an accurate indication of the pit status. It is therefore
important to position and install sensors according to the
manufacturer's instructions.
General requirements
The sensors must always be correctly sized for the range they are
to measure. If the sensor is too small, it will be saturated. If it is too
big, the resolution of the sensor signal will be too poor.
4.2 Electrical installation
The electrical connection should be carried out by an authorised
person in accordance with local regulations.
WARNING
Electric shock
Death or serious personal injury
‐
Before making any electrical connections, make sure
that the power supply has been switched off and that it
cannot be accidentally switched on.
The following sections are intended as a supplement to the wiring
diagram supplied with the Dedicated Controls control cabinet.
4.2.1 Terminal blocks
Terminal block for the mains supply
• Connect the mains supply cable.
• Connect the supply cables for each pump and the mixer, if
installed. The mixer is optional.
Control signals
The system is controlled by various sensors, modules and relays
connected to these inputs and outputs:
• AI (analog input)
• DI (digital input)
• AO (analog output)
• DO (digital output).
Terminal block for the IO 351B
Input type Input type
10 DI1 15 GND
21 GND (AO) 22 AO5
30 PTC1 32 PTC2
35 GND (PTC) 36 PTC4
40 PTC6 41 GND (PTC)
53 24 V 55 GND
60 AI2 82 DO4, NO
86 DO6, NO 88 DO7, NO
83 DO4, C 85 DO5, C
83 DO4, C 85 DO5, C
Terminal block for the CU 362
Input type Input type
10 DI1 11 GND
13 GND 14 DI3
50 +24 V 51 AI1
54 AI2 57 AI3
70 DO5, C 71 DO6, NO
73 DO6, C 74 DO7, NO
For the connection of the IO 113 module, see installation
and operating instructions for IO 113.
In the following sections, two examples are shown:
• Two pumps with analog level sensor and safety float switches.
• Two pumps with five float switches. Special application that
requires special wiring in the control cabinet.
Input type
18 AO4
26 AO6
34 PTC3
38 PTC5
47 GND (AO)
57 AI1
84 DO5, NO
89 DO7, C
87 DO6, C
87 DO6, C
Input type
12 DI2
47 +24 V
53 +24 V
58 GND
72 DO6, C
75 DO7, C
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