Hardware required for network connection:

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

The CIM500 interface offers easy integration into both new and existing systems, as the Modbus TCP protocol is a standard protocol supported by numerous control and automation systems.
With a rotary switch, you can easily change the protocol to PROFINET IO, Bacnet Ip and Ethernet IP.
An integrated webserver allows easy Ethernet parameter changes to configure the CIM500 to the wider system.

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 Modbus TCP networks

Quick Guide for the CIM/CIU

Common error code for all Grundfos products

The PC-Tool Water Utility is intended for system integrators and Grundfos service personnel. It can be used for both on-site service and off-site preparatory, inspection and management works.

PC Tool Water Utility


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

With the "Grundfos GO Remote" app, you can use your smartphone or tablet to parameterise Grundfos pumps and controllers, save settings and create commissioning logs.
The app can be connected to the device via Bluetooth if it is supported or via a Grundfos MI 301 (98046408). The free smartphone app is available for download in the app stores below:

Modbus TCP

MP 204