Operation Manual

DCF77N CLOCK
DCF77N Clock
The Elproma DCF77N clock is developed to guarantee the
exact time on LAN or stand-alone computer systems. The
DCF77N clock system receives the radio signal which is trans-
mitted by the DCF77 Atomic clock transmitter near Frankfurt in
Germany. The time signal is based on the vibration frequency
of the cesium atom. The accuracy is about 1 second in 300.000
years. The Elproma DCF77N clock receives this time signal
and check whether the time frame is correct or not.
Inside the DCF77N clock a system of 5 internal clocks en-
sure that the received time is the correct time. In this way
improper received time signals can never disturb your com-
puter time and the exact time is guaranteed. Even after 3 days
without power and not receiving the DCF signal, the accurate
time is guaranteed. From now on the accurate time is always
available for your operating system and application programs.
Special features include a low voltage alarm contact, a
switched mains and relay contact output controlled by a pro-
grammable 7 day timer and a 24V slave clock output. The
Elproma DCF77N clock has found its way in the market where
exact time is essential. Amongst the many applications you
will find: time registration systems, banking, stock exchange,
transportation companies, airlines, research, broadcasting.
ELPROMA Electronics www.elproma.nl [e-mail]