Discovering time distribution

Principle

Synchronisation of a network of clocks in one or more buildings without connecting the clocks with cables.

Transmission of a complete time message (time and date) over a two-wire line.

Electrical impulses sent out every minute to slave clocks by the master clock over a distribution line.

Technology

The master clock sends a time code via an 869 MHz radio transmitter

Specification of the message content and its transmission via the AFNOR NF S 87 500 standard

Reversed 24 Volt minute impulse system

Advantages

• The slave clocks capture the time message and are synchronised automatically. If there is any interference, they will continue to work on their own time base.
• The signal has a range of around 100 to 200 metres
• Getting rid of cables means major savings can be made in the installation and provides great freedom of location.

• Around 100 slave clocks are connected on the same 2-wire line.
• The AFNOR code does not generate any interference and is not affected by other electrical interference.
• Standalone operation of the slave clocks for 1 hour if the signal is disconnected.
• The system is ideally-suited to digital clock networks.

• Power reserve on the master clock to reset the slave clocks automatically in case of a power cut.
• The most economical system for small time distribution systems.

Installation locations

Multi-premise installation, renovation, extension of a clock network, etc.

Large buildings such as airports, train stations, etc.

Small installations