System Description; Cim 200 Modbus; Cim 260 Cellular Modbus; Cim 500 Modbus Tcp - Grundfos CIU 202 Functional Profile And User Manual

3. System description

The system diagrams provide an overview of the different
technologies and how to connect CIU XX2 to the Grundfos
AUTO pump, that you connect to a Modbus network.
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The CIU XX2 unit is a communication interface in a system
consisting of up to four Grundfos DP, EF, SL1, SLV or SEG
AUTO wastewater pumps installed in one or more pump
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pits. The pumps connect to CIU XX2 running communication over
a separate pair of wires.
Each pump has an integrated pressure sensor that enables it to
monitor the water level in the pump pit according to a common
reference level and an intermittent operation scheme. By
monitoring the water level, the pump obtains enough information
to know when to start and stop pumping.
The CIU XX2 unit is not involved in the control of the water level,
starting and stopping of pumps, but merely provides the interface
necessary for the following:
• Configuration of the pump parameters required for the level
control.
• Online monitoring of pit and pump values.
• Individual, manual, control of each pump (forced start
andstop).
• Obtaining of measured and logged data that are valuable for
pump service and pit optimisation.
• CIU XX2 can communicate with Grundfos GO Remote. This is
not shown in the pictures and is not discussed further in this
manual.

3.1 CIM 200 Modbus

Communication can be established by using the Modbus RTU
connection in CIU 202.
CIU 202*
Modbus RTU
Sensor inputs
CIU 202* solution for Grundfos DP, EF, SL1, SLV and
Fig. 1
SEG AUTO pumps
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* CIU 202 is a combination of a CIU 902 unit and a CIM 200
module.

3.2 CIM 260 Cellular Modbus

You can establish remote communication via CIU 262 by using
one of the following options:
• Modbus RTU protocol via a call-up connection
• Modbus TCP protocol via a data connection
• SMS commands from a mobile phone.
Cellular
CIU 262*
Sensor inputs
CIU 262* solution for Grundfos DP, EF, SL1, SLV and
Fig. 2
SEG AUTO pumps
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* CIU 262 is a combination of a CIU 902 unit and a CIM 260
module.

3.3 CIM 500 Modbus TCP

You can establish communicationby using the Modbus TCP
ethernet connection in CIU 502*.
CIU 502*
Modbus TCP
Sensor inputs
CIU 502* solution for Grundfos DP, EF, SL1, SLV and
Fig. 3
SEG AUTO pumps
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* CIU 502 is a combination of a CIU 902 unit and a CIM 500
module.
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