The DDC4000 is a modular building automation controller from Kieback & Peter, purpose-built for HVAC and ventilation management in commercial and industrial facilities. Running on embedded Linux with a 32-bit processor, it combines direct digital control (DDC) logic with multi-protocol communication to orchestrate heating, cooling, air handling, and lighting systems from a single hardware platform.

How many protocols can the DDC4000 handle simultaneously?

The controller natively supports BACnet/IP, BACnet MS/TP (RS485), and LON communication. Through dedicated gateway modules, it also bridges KNX, DALI, and M-Bus networks — allowing the DDC4000 to function as a central protocol translator across heterogeneous building systems without external middleware.

What is the maximum system size?

Each DDC4000 can control up to 12 ventilation or air handling units and manage up to 600 field devices (sensors and actuators). Two CAN-based expansion buses extend I/O capacity: the Field Bus F supports up to 63 modules over distances up to 2000 m, while the Cabinet Bus S handles up to 16 modules within a control panel. For larger installations, multiple DDC4000 controllers can be networked together.

Can the DDC4000 be accessed remotely?

Yes. The built-in Ethernet interface provides full web-based access via standard browsers — no additional software required. An optional GSM modem enables wireless connectivity for sites without Ethernet infrastructure, making the controller suitable for remote plant rooms, rooftop AHUs, and distributed building networks.

What certifications does it hold?

The DDC4000 is certified as a BACnet Building Controller (B-BC) under BTL testing, is AMEV AS-B listed for German public-sector building automation projects, and carries LON certification. Kieback & Peter manufactures the hardware in Germany under ISO 9001, 14001, 27001, and 50001 management systems.