Control high-performing buildings with DESIGO PXC4 and PXC5 controllers

Your turn with PXC4 and PXC5.

Control high-performing buildings with the Desigo PXC controllers
Browse the Desigo PXC range

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A new era

Take the next step in building automation control

The new Desigo PXC4 and PXC5 controllers allow you to transform buildings into high-performing buildings. Discover how you can enter a new era of automation control. It’s your turn!

Tackle your challenges with a new generation of controllers

There are many challenges for high-performing buildings that can be mastered with the help of the new Desigo PXC4 and PXC5 controllers. These buildings need to intelligently connect field devices, enable quick and easy engineering, be both open and secure at the same time, and provide all the information necessary to optimally manage a building. This calls for a new generation of controllers. It’s time for Desigo PXC4 and Desigo PXC5 controllers – the first of a new range of building automation controllers that expand and strengthen the Desigo system.

System benefits

Features and functionalities for high energy efficiency

The Desigo PXC4 and PXC5 controllers bring a broad range of new functionalities.
Portfolio at a glance

Discover the Desigo PXC4 and PXC5 controllers

The new generation of Desigo automation controllers consists of the Desigo PXC4 for HVAC plants and the Desigo PXC5 for system functions and integration. Both offer a wide range of benefits for automating small to medium-sized buildings.

Desigo PXC4 BACnet controller

The Desigo PXC4 controller is designed as a compact device with 16 onboard I/Os that can be expanded to a maximum of 40 IOs with additional TX-I/O modules. TX-I/O modules can be directly connected or installed on another location by island bus. The PXC4 has an integrated power supply for up to 4 TX-I/O modules and an RS485 port used for Modbus RTU. You can add as many devices as you like, either on RTU or TCP, up to a limit of 40 Modbus data points. The hardware is ready for future connection of KNX devices by simply installing a firmware update. 

Desigo PXC4 Small BACnet controller

Introducing Desigo PXC4 Small, the smallest family member in the next generation of automation for efficient control of HVAC plants. This cost-effective controller with plenty of I/Os is the optimal solution for small plants needs. It's the right choice for you if 3rd party integration is not required.

Desigo PXC5

The PXC5 is a freely programmable controller used for BACnet system-level functions like alarm routing, system-wide scheduling and trending, and device supervision. It also comes with a web interface for generic datapoint commanding. Two RS485 ports can be configured as either BACnet MS/TP or Modbus RTU, and Modbus TCP devices can also be integrated. Integration of up to 500 Modbus data points is included. The hardware is ready for future connection of KNX and Mbus devices by simply installing a firmware update.

Desigo TX-I/O modules

TX-I/O modules for signaling, measuring, metering, switching and positioning can be seamlessly connected to controllers for ultimate flexibility.


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Desigo Engineering Framework

Engineer high-performing buildings

A single framework for maximum efficiency

It’s the perfect match for the Desigo PXC4 and PXC5 controllers: The Desigo Engineering Framework enables you to realize high-performing buildings. It allows to plan, engineer, install, commission, and operate highly reliable and efficient building automation systems.

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Digital offerings that get you up to speed

Get the most out of the Desigo PXC4 and PXC5 controllers with our free digital offerings in various formats.

Watch these short tutorial videos and learn how to gain efficiency on the engineering of your building automation system.

Our Webinars give you the information that you need on the key features and benefits of our building automation technologies. Register for free and enjoy the recordings.

Are you interested in learning how to work with your Desigo PXC4 and PXC5 controllers comfortably in your office? Then don’t hesitate to watch our training videos online. Here you’ll find recorded lectures and demonstration videos. 

In our training program, you’ll learn how to safely and efficiently work with Siemens products and prepare you for a subsequent certification as a Siemens system partner. Advanced trainings provide you with all the knowledge you need, to stay successful as a professional.


We are looking forward to your attendance!

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For additional information simply contact your local Siemens department by e-mail:


Now it's your turn!

Discuss your project with a certified partner of Siemens.

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Or learn how to join the partner network yourself.

Explore the Desigo portfolio

Combine your PXC controllers with the systems for room automation and building operations to improve the efficiency of your site at all levels.
Downloads & Support

Downloads, tools, and global customer support

Download presentations, brochures, data sheets, and the license-free engineering tools of the Desigo PXC controllers here.


The direct way to your Desigo controller contact

The availability of certain controllers may vary depending on your region. Do you have questions about our Desigo controller portfolio, or do you want to discuss specific challenges with our experts? Contact our regional offices – we’re looking forward to hearing from you!