Networking requirements

Please note, this page gives answers to Mount Kelvin DALI, which may not be applicable to Mount Kelvin Mesh. Please see the Mesh documentation for information about the new product.

Mount Kelvin DALI consists of three parts: The DALI bus, a Room Control Unit to convert signals between IP and DALI bus as well as a cloud backend.

Each Mount Kelvin Room Control Unit needs a working Internet connection via Ethernet as well as power. This means an ethernet connection is required in each room, usually in the electrical cabinet of the room.

Networking components like switches are never offered as part of a Mount Kelvin project proposal, customer networking contractor must acquire and install these separately. All Mount Kelvin Room Control Units require outbound connectivity to the Internet. Notably, the network connection must be installed and fully functional prior to starting commissioning.

The Room Control Units acquire IP addresses via DHCP, no manual IP assignment is needed. All Room Control Units in a single installation must be placed in a single network, which does not filter mDNS traffic.

In a typical network no firewall changes are necessary, but if a firewall with outbound communications restrictions is present, the following ports must be open:

Direction Port Protocol Purpose
Outbound 443 TCP HTTPS to cloud backend, system updates
Outbound 29648 TCP Logging service for maintenance
Outbound 123 UDP NTP time synchronization
Outbound 53 UDP DNS (Domain Name Service)

No inbound connections are needed.

The connection between the Room Control Units and cloud backend is built upon websockets. Monitoring of Room Control Unit connection status is handled by monitoring the websocket state. In addition to the socket to the command&control backend, a separate fleet management system monitors the Room Control Units.

The bandwith requirements of the Room Control Units are relatively low, a few hundred MB / month. A more critical consideration is network latency, but this aspect is only relevant when using the mobile or web application to control the system and during commissioning. During normal operation the switches and sensors in the rooms are used as the primary control mechanism and the network connection is mostly used for status reporting and monitoring. Temporary spikes in network usage may be observed during updates of the Room Control software, which can amount to 1-2Gb/Room Control Unit.

The Mount Kelvin Room Control Units do not support PoE, a separate power supply is provided with the Room Control Unit for DIN rail installation.

Other devices, such as building automation systems may be present in the same network as Mount Kelvin Room Control Units, however we do recommend separating staff and guest networks to ensure that a resonable amount of bandwidth remains available for room control.