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3. System description
3.1 Modbus
The system diagrams give an overview of the different
technologies and how to connect the module or unit to the
Grundfos Booster that you connect to a Modbus network.
Note that the Hydro MPC and Control MPC are available in two
variants: with a CU 351 or a CU 352 control unit. They have
different CIM/CIU connections, as described below.
CIM solution
The Communication Interface Module (CIM) is an add-on
communication module that you install into the back of these
control units:
• CU 352 Hydro MPC
• CU 323 Hydro Multi-B
• CU 354 DDD.
You can fit it inside the terminal box of the master pump in a
Hydro Multi-E model H and later booster system.
You can also fit it in the master pump of the twin pump types
TPED and MAGNA3-D.
In this setup, the booster system will supply power to CIM 200.
See fig. 1.
CIU solution
The Communication Interface Unit (CIU) is a unit incorporating a
power supply module and a CIM Modbus module. You can mount
it either on a DIN rail or on a wall. See fig. 2.
You use CIU 200 with the older products:
• CU 351 MPC
• Multi-E model G.
Further, you must fit CU 351 MPC with an add-on module for the
external GENIbus connection to connect to the CIU unit.
3.2 CIM 200 Modbus RTU
Fig. 1 Example of a CIM 200 solution. The module is
installed inside the CU 352 controller
Fig. 2 Example of a CIU 200 solution for Hydro Multi-E model G
Fig. 3 Example of a CIM 200 solution for Hydro Multi-E
model H and later. Pumps connected via built-in radio
communication (Grundfos Glowpan)
The example for Multi-E model H and later is identical for TPED
model H and later and MAGNA3-D. In all cases, mount the CIM
module in the master pump placed to the left.
For the purpose of redundancy, you can mount a second CIM
module in pump 2 for TPED and Multi-E (not MAGNA3-D). In that
case, all writings from the Modbus master must be send to both
CIM modules.
QFlow rate.
SELV Separated or Safety Extra-Low Voltage.
SELV-E
Separated or Safety Extra-Low Voltage with
earth connection.
SIM Subscriber Identity Module. SIM card.
SMA
SubMiniature version A. Coaxial radio signal
cable connection standard.
SMTP Simple Mail Transfer Protocol.
SNTP
Simple Network Time Protocol. Used for clock
synchronisation between computer systems.
TCP
Transmission Control Protocol. Protocol for
Internet communication and Industrial Ethernet
communication.
TCP/IP
Transmission Control Protocol/Internet Protocol.
Protocol for Internet communication.
Transmission
speed
Bits transferred per second, bits/s.
URL
Uniform Resource Locator. The IP address used
to connect to a server.
UTC
Coordinated Universal Time. The primary time
standard by which the world regulates clocks
and time.
UTF-8
Unicode Transformation Format. Character
encoding.
VPN
Virtual Private Network.
A network using the Internet to connect nodes.
These systems use encryption and other
security mechanisms to ensure that only
authorised users can access the network and
that the data cannot be intercepted.
TM04 2297 3913TM04 2608 3913TM07 0146 4317
Hydro MPC
(CU 352)
CIM 200
Sub-
GENIbus
RS-485
1 2 345 67
8
9
CIU 200
GENIbus
RS-485
Modbus RTU
RS-485
CRE with
Hydro Multi-E
add-on
Sub-GENIbus
RS-485
1 2 345 67
8
9
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