How can I calculate the power supply to be used for the supplementary supply of Millenium access control devices?

Carolina Bachenheimer-Schaefer
29.08.2017 12:04

For system sizing (number and type of supplementary 10 - 32V DC/12 - 24VAC power supplies to use), bear in mind that each Millenium access control device draws a peak power of 1W. ABB recommends using a dedicated power supply/transformer to power the electric lock (not the same one used for the access control devices range), as the power draw of the electric lock is not usually known beforehand and can invalidate the correct sizing of the power supply for the access control devices, causing outages and malfunctions. Where installation requirements should necessitate the use of a common power supply/transformer (for example one in each room for applications such as hotels), it is essential to consider the maximum possible power draw of the electric lock and subtract this from the available power provided by the power supply/transformer: the residual power must be sufficient to power all access control devices running on that power supply/transformer.

Tags: KNX, Room Control
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