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Autonomous Clocks/Stand-alone Clocks

• Quartz Clock: Autonomous clocks which require manual setting at start-up, without automatic summer/winter time changeover.
• Radio-controlled Clock: Autonomous, precise clocks which are synchronized by the German DCF77 time signal transmitter within an approx. 1 500 km radius of Frankfurt am Main. Fully automatic clock hand movement control (of analog clocks) and summer/winter time changeover.

Attention! Radio reception may be limited in buildings due to structural reasons, and should be checked prior to the purchase and start-up of autonomous, radio-controlled clocks. Based on our many years of experience, we therefore always recommend the use of a highly stable master and slave clock system such as NIS-TELNU.

System Clocks with Master Clock

• Pulse Slave Clock: A system clock which is controlled by a master clock with 12/24 V alternating polarity minute pulses. All slave clocks must be connected with the correct pole orientation. Clocks with a date display must be manually set at start-up or after correcting a fault. As a rule, analog clocks with a second hand require an additional twist pair cable with a second impulse from the master clock or an integrated synchronized second movement.
• NIS-TELNU Clock: The intelligent slave clock direct from the inventors of the TELNU System, which is controlled via a TELNU master clock with serial time telegram (seconds, minutes, hours, day, month, weekday and year) without additional cable (operating voltage and data transmission via twist pair cable). All analog clocks (including those with date display and/or second hand) and digital clocks can be operated with this system. Fully automatic clock hand adjustment via electronic clock hand movement control with summer/winter time changeover.

The clock system is automatically set at start-up and after correction of faults such as cable breaks or short circuits. It is not only the significant, one-time cost saving at start-up that "counts". The long-term, reliable technology also provides security and cuts operating costs.