Overview
The document provides a detailed description of the Grundfos CIM/CIU communication interfaces, which are designed for complete control of pump systems through data communication via various open and interoperable networks. These interfaces support networks such as Profibus DP, Modbus RTU, LONWorks, BACnet MS/TP®, PROFINET IO, Modbus TCP, GSM/GPRS, BACnet IP, and Grundfos Remote Management.

CIM/CIU Concept
The CIM (Communication Interface Module) and CIU (Communication Interface Unit) are integral to the Grundfos fieldbus concept, offering ease of installation, user-friendliness, and cost-effectiveness. CIM modules are add-ons for communication with specific pump models, while CIU units are used for products with a GENIbus interface and include an integrated power supply.

Applications
CIM modules are used with E-pumps, Multi-E, Dedicated Controls, MAGNA3, CU 352 Hydro MPC, and CU 323 Hydro Multi-B. CIU units are suitable for CUE frequency drives, E-pumps with MGE model F/G, and MP204 motor protection. A variant with an additional IO board (CIU 251) is available for GSM/GPRS interfaces.

Benefits
The use of open and interoperable data bus networks allows for optimal integration of data communication and field devices into management systems, reducing time spent on reporting and data collection, and minimizing service visits. This leads to efficient maintenance scheduling and reduced emergencies.

Supported Products and Protocols
The document lists various CIM/CIU models and their compatibility with different networks and products, such as:

• CIM 050 for GENIbus
• CIM 060 for radio communication to Grundfos GO Remote
• CIM/CIU 150 for Profibus DP
• CIM/CIU 200 for Modbus RTU
• CIM/CIU 250 for GSM/GPRS networks
• CIM/CIU 300 for BACnet MS/TP networks
• CIM/CIU 500 for PROFINET IO/Modbus TCP/BACnet IP

Accessories
Available accessories include RJ45 plugs, antennas for CIM/CIU 250/270, CIM 250 battery, GENIbus cable, and Robustel routers for wireless communication.

Conclusion
The Grundfos CIM/CIU communication interfaces provide a comprehensive solution for integrating pump systems into various network protocols, enhancing control, efficiency, and maintenance of pump operations.