Grundfos CU 323 Series - Electrical Installation and Connections

English (GB)
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2.3 Electrical installation
2.3.1 EMC-correct installation
CU 323 is normally mounted in a panel which also
contains contactors and other power equipment.
To ensure faultless function, install the electronic
modules in an EMC-correct way:
• Ensure sufficient earth connection between
CU 323 and the frame. See fig. 2.
• Use screened cables for internal GENIbus.
Connect the screen to the cable clamp in front of
the terminals A1, Y1 and B1. See fig. 3.
• Use screened cables for CIM modules.
Connect the screen to the cable clamp in front of
the CIM module terminals. See fig. 3.
Fig. 3 Cable screens for external and internal
GENIbus connections fixed with cable
clamps
• Use screened signal conductors for digital and
analog inputs.
2.3.2 GENIbus connection to E-pumps
CU 323 can communicate with one or more E-pumps
via internal GENIbus.
Fig. 4 GENIbus connection to E-pumps
Connection with variable frequency drive via Modbus
(RS485):
2.3.3 Fieldbus communication interface modules
(CIM)
CU 323 can be connected to an external
communication network via an add-on fieldbus CIM
module.
A CIM module is a communication interface module.
These CIM modules are available:
• CIM 050 RS-485 GENI
• CIM 110 LON
• CIM 150 Profibus
• CIM 200 Modbus RTU
• CIM 250 GSM/GPRS
• CIM 300 BACnet MS/TP
• CIM 500 Modbus TCP, Profinet or BACnet IP.
The CIM modules must be ordered separately.
The installation of the CIM module is described in the
Hydro Multi-B service instructions available in
Grundfos Product Center. Copy the link below to see
the document online:
http://net.grundfos.com/qr/i/97916525.
TM04 9275 3810
Remove any isolating plastic tape between
the screen and the sheath before
mounting the cable in the cable clamp.
Do not twist the screen ends as this will
destroy the screening effect at high
frequencies.
Terminals for CIM module
TM04 9276 3810
GENIbus terminal Description
A Positive
YCommon
B Negative
CU 323
E-pump