Introduction to KNX

KNX is a network communications protocol for intelligent buildings, both commercial and residential. Types of equipment that use the KNX protocol include lighting, security systems, energy management, and heating, ventilating and air conditioning (HVAC). As a worldwide standard managed by the KNX Association, it is the successor to, and the convergence of three previous standards: European Home Systems Protocol (EHS), BatiBUS, and European Installation Bus (EIB). Supported by more than 300 vendors, KNX is a worldwide standard, conforming to EN 50090 and ISO/IEC 14543.

Our Commitment to KNX

As a member of the KNX Association, we strive to support the development of interoperable systems for home and building control, and to offer a standards-compliant KNX driver on our protocol gateways. All EIS data types are supported, allowing communication to any kind of KNX device in the installation. The FieldServer also includes a KNX Device Emulation program to allow third party devices to be recognized as KNX devices for complete connectivity and efficiency.

KNX Interoperability

In larger facilities, it is necessary to connect KNX-based networks to devices and management systems that utilize other protocols. For example, a facility manager may wish to integrate his KNX-based room controller system with the building’s larger BACnet/IP based management system. Or a device vendor that offers Modbus based devices may wish to present their device as a KNX device so that it can participate as a true peer in a KNX-based control network. Or the facility manager may wish to connect a KNX-based device network to a cloud service for remote monitoring using XML.

The FieldServer protocol gateways and converters can connect KNX devices networks to various management systems and non-KNX devices to KNX networks. integrators and installers use our gateways for their flexibility, reliability, and ease-of-use, while OEMs often incorporate the FieldServer protocol gateway technology into their devices in lieu of doing their own protocol development.


FieldServer protocol gateway and router products from Sierra Monitor can connect KNX devices to management systems based on other protocols and non-KNX devices to KNX networks. The products are configured with the KNX driver and the KNX-specific hardware option along with the other required protocol drivers. Buyers usually order one of the hardware platforms below with the KNX driver and specify the other drivers they want loaded on it.

KNX Converters and Gateways for Integrators

Integrators value the flexibility and ease-of-use offered by the FieldServer protocol gateways because it allows them to complete their integration projects quickly and with low risk. The following products are available to integrators:

KNX Converters and Gateways for OEMs

OEMs embed the FieldServer protocol gateways with their products as it enables them to become “multi-protocol" aware (without increasing R&D costs), so they can bid on different project specifications. The following products are available to OEMs:

Protocol Drivers

KNX protocol converters and gateways are ordered with the following protocol driver:

The gateway is also ordered with one or more of the following protocols depending on what other control networks are being connected to the KNX network: