LON systems are primarily used in large real estate complex.

Time system using the LON-technology is characterized by integrating the time control with the network used for e.g. control of lighting, energy, door locks, break period signalling and alarm functions within a building. This means that all units within a network are connected on the same pair of wires.

Westerstrand LON-System comprises a master clock or a time central, analogue and digital time indicating clocks.

The master - WDP-LON - operates as time base for the entire LonWorks-net and provides this with correct time every minute or more frequent if prefered. WDP-LON receives status reports from the connected clocks, and via the master unit one can check clocks reporting faulty status. The identity of the clock as well as status are shown in the display of the master. When the time indicating LON-clocks are connected to a LonWorks-net, they are automatically set to correct time. The analogue clocks report their status to the network.

Westerstrand have developed an intelligent electro-mechanical movement with integrated LPT-10 transceiver. This movement is used for a series of analogue clocks available in a variety of sizes and types. Using LPT-10, i.e. free topology with internal power feeding, has numerous advantages. One of them is that power feeding and data transmission is combined on the same pair of wires.(Digital LON-clocks also require mains supply 230V AC, beside the connection to the network.)

The movement automatically detects the position of the hands, and also facilitates a number of control functions ensuring faultless operation. Should the message fail for any reason, the clock automatically takes over its own operation provided that it has received correct time at least once. Using a variable, it is possible to enter the period of time allowed for the clock to run without receiving data from the network. When this preset time has run out, the clock will automatically be set to 12.00 o’clock and stop.

Digital clocks are automatically set to correct time within 2 minutes after connection.