Hardware required for network connection:

CIU 900 + CIM 500 + cable 3m
Product number CIU 900: 99448387
Product number CIM 500: 98301408
Product number Cable 3m: 98589048

Note: Large DDA XL pumps require a CIU box (use of E-Box not possible).

The following cable can be used for the databus communication between the DDA dosing pump and a CIU box. Genibus connecting cable, 3 m, M12 (98589048).

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.

Learn more about the CIU in the Grundfos Product Center

Learn more about the CIM in the Grundfos Product Center

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


Modbus TCP

DDA XL Dosing