Guest room management system based on DALI and EnOcean technologies.


Here you’ll find all the required information to have your 401-D properly planned, designed, and delivered.

In order to understand how to design a room equipped with a 401-D, please get acquainted with our hotel room planning guide, which covers the design principles and features.


System overview


Fleet manager

Configuration and commissioning of the 401-D are done with Mount Kelvin Fleet Manager.

We are currently updating the software and a new version will be available on 12/2021.


Mount Kelvin cloud

The glue between the buildings (and their RCUs) and fleet management tools. Additionally, it:

  • keeps configuration backups
  • serves as the endpoint for 3rd party integrations
  • pushes software updates to the RCUs automatically
  • stores sensor data

Planning tools

Project timeline


Can I use any DALI device on the market?

For LED drivers, all high-quality DALI drivers should work. For other devices, please use one of the supported DALI devices. Other devices like input units or relays are likely to work well even outside the supported devices, while motion and other sensors are not.

If you need to use an unsupported device, please let us know which one and your use case for it, and we’ll help you find the right solution.

Can I control all types of devices through BACnet or just HVAC systems?

The BACnet IP integration is built with AC units in mind and only exposes the room occupancy state in its current form. Adding support for other devices or use cases can be investigated. Please let us know what you need and we’ll get back to you.

Do I get notified of broken/missing devices?

Currently there is no facility for notifying users about missing devices.

Can I get operating time reports for lights and other devices?

The Mount Kelvin app includes light intensity level information on per-space granularity. Additional reports can be built at an additional cost. Please contact us to discuss your needs.

Can I set a timer-like schedule from the front desk on a specific device like a floor heat bathroom?

Timers can be set to activate scenes, which gives quite a lot of flexibility. There currently is no support for floor heating thermostats, but a thermostat could be installed behind relay control, which would enable/disable floor heating based on its internal temperature setting.

Can I use a fire alarm system to control lights in the room?

Supporting a fire alarm system to control the lights in the room is possible, given that the fire alarm device in the room can provide a signal to a DALI Input unit. We can then configure the DALI input unit to turn on the room lights when an alarm is triggered. We do not support resuming the old light state after the alarm is cleared automatically, however from an end user standpoint it is better to have the lights on when they return to the room after the alarm - during the night an alarm might have the system resume to a light-off state, which is inconvenient.

The fire alarm control requires some customization and testing with the fire alarm devices used at the site, therefore this configuration is available only for larger installations of >100 rooms.

Are there any limits to group assignments?

There are very few limits in the grouping, although the 64 device limit of DALI creates a degree of limitation.

Creating very large groups is fine, but having vary many can cause some odd effects when using push-dim (very many groups may cause some lights to lag behind).

Prefer large groups over many groups.

Can I disable the occupancy sensor if a scene is activated?

The occupancy sensor ‘On Movement’ event will not override a scene activated with a push-button or via the app. The ‘On Absence’ event will, but this is logical: Lights will turn off after a while even in spaces where a push button was used to turn them on, as long as the space remains empty for a while.

Can I control all lights separately if I want to?

Theoretically yes, if you map each device to its own group. In practice, this is not a good idea, any large site will have far too many luminaires for this to be practical.