English (GB)
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5.2 Analog control
Control MP 204 with IO 112 (filling application)
The application is controlled by an analog level sensor.
The pump is started when the minimum water level is reached.
The pump is stopped when the maximum water level is reached.
The pump can be protected using an electrode relay for
dry-running protection.
If the water level continues to rise, the IO 112 will generate
an alarm which is available on the GENIbus.
Fig. 7 Example, analog control in filling application
Control MP 204 with IO 112 (draining application)
The analog level sensor is used to start the pump when drainage
of water is required, for example in a pit or dewatering system.
The pump is started when the maximum water level is reached.
The pump is stopped when the minimum water level is reached.
The pump can be protected using an electrode relay for
dry-running protection.
If the water level continues to drop, the IO 112 will generate
an alarm which is available on the GENIbus.
Fig. 8 Example, analog control in draining application
6. Installation
Before installation, check the following:
• Do the specifications of the Control MP 204 correspond to
the order?
• Are all visible parts intact?
The Control MP 204 is operated either manually or via remote
access from Grundfos Remote Management (optional).
See section 7.2 Operation.
6.1 Mechanical installation
This section describes the mechanical installation of the
Control MP 204 and also provides general advice about how to
position sensors in order to achieve stable, measured values.
The control cabinet is designed for indoor use, either mounted on
a wall or directly on the floor.
6.1.1 Sensors
To ensure correct and reliable operation of the Control MP 204,
it is important to position and install sensors according to the
manufacturer's instructions.
6.1.2 Configuration by PC Tool and PC Tool Link
For the physical connection between the PC and the Control
MP 204, a Grundfos PC Tool Link is used. This converts the
RS-485 used by the Control MP 204 to USB used by the PC.
The PC Tool Link also provides a galvanic separation between
the PC and the Control MP 204.
Fig. 9 Configuration by PC Tool Water Utility
Load the PC Tool Water Utility and configure the Control MP 204
direct on line, or upload a prepared configuration file to the
MP 204 and/or IO 112.
TM04 9373 4010TM04 9374 4010
Pump
Level sensor
Control MP 204
Buffer tank
Pump
Level sensor
Control MP 204
Dry running
Warning
Installation and operation must comply with local
regulations and accepted codes of good practice.
If the Control MP 204 is to be used outdoors,
the control cabinet must be located in a separate
cabinet which is suitable for outdoor use.
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.
TM04 9375 4010
MP 204
PET1 T2 G1 A1 G2 A2 K1 K2 R1 R2
P1 P2 P3 P4 P5
AYB
ON DIP
12345678910
IO 112
Reset
15
90
75
60
45
30
120
100
80
60
40
20
600
500
400
300
200
100
%C Pulse
o
AI PT CNT
D1 D2 D3 D4 D5 D6 D7 D8
AB
PC
PC Tool link
USB cable
RS-485 cable
MP 204
IO 112
