Hardware required for network connection:

CIU 900 + CIM 500
Product number CIU 900: 99448387
Product number CIM 500: 98301408

These communication interfaces are based on standard BACnet object types and take direct data access via the network into account. The BACnet functional profile has been specifically created and optimised for the exchange of data between pump systems and the building automation system.

With a rotary switch, you can also change the protocol, e.g. to Modbus TCP.

An integrated webserver allows the Ethernet parameters to be set easily.

The CIU 900 is an external module for integrating the CIM, for wall or top hat rail assembly. These are equipped with an integrated 24 - 240 V AC/DC power supply unit.

Basic information on Grundfos Gateways for BACnet IP networks

Quick Guide for the CIM/CIU

Common error code for all Grundfos products

The PC Tool CIM/CIU is intended for system integrators and Grundfos service personnel. It shows the data content (functional profile) of a Grundfos product, which is connected to your PC via a CIM, CIU or softCIM.

PC Tool CIM/CIU


The CIM 500 firmware can be updated via the integrated webserver.

Current CIM 500 firmware

BACnet IP

CUE