3
2.4 System diagram
The Grundfos MP 204 is an electronic motor protector.
The MP 204 is connected to a Grundfos pump.
The system diagram gives an overview of how to connect the
CIU 250 to the Grundfos MP 204 via GENIbus.
The CIU 250 solution is a box with a power supply module and
a CIM 250 module. The CIU 250 can either be mounted on a
DIN rail or on a wall. See fig.
.
Remote communication via the CIU 250 can be established by
using one of the following options:
• Modbus RTU protocol via a GSM connection
• Modbus TCP protocol via a GPRS connection
• SMS commands from a mobile phone.
Infrared remote communication can also be established with the
hand-held Grundfos R100 remote control. This is out of the scope
of this manual.
Fig. 1
CIU 250 solution for the MP 204 connected to a pump
SELV
Separated or Safety Extra-Low Voltage.
SELV-E
Separated or Safety Extra-Low Voltage
with Earth connection.
SIM
SIM card, Subscriber Identity Module.
SMA
SubMiniature version A.
Coaxial radio signal connection
standard.
TCP/IP
Transmission Control Protocol/Internet
Protocol. Protocol suitable for internet
communication.
Transmission speed
Bits transferred per second.
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.
TM
04
74
44
06
10
Grundfos MP 204 with pump
GSM/GPRS
CIU
R100
Pump
MP 204
motor
protector
GENIbus
RS-485