*GNS-300 is available separately
SEIKO QC-5500 Series is a high-precision quartz master clock
equipped with a wide variety of functions that meet the needs of
the users, such as synchronization output via RS-422 and daylight
saving time setting. Models operating on AC 110 V (QC-55X01) and
AC 220 V (QC-55X02) are available.
By connecting the GNSS Receiver (GNS-300) for exclusive use with
QC-5500 Series, the internal clock can be adjusted automatically
on a regular basis.
How to Drive Secondary Clocks
Accuracy and Synchronization of Secondary Clocks
The role of the secondary clock in a time-keeping system is to accurately reproduce the
time signal supplied by the master clock. The master clock and secondary clocks are
connected electrically , and the Crystal oscillator frequency of 32.768kHz or 4.194304
MHz/sec. from the master clock is reduced in several stages by the frequency diving LSI
and finally transmitted to the secondary clock as a 1-sec. or a 30-sec. polarized signal of
±24V DC. The secondary clock converts this electrical signal into mechanical energy and,
with the same precision as the master clock, simultaneously displays the correct time.
(1) Master clock function (QC-5510X, QC-5520X and QC-5530X)
Up to 30 secondary clocks can be connected to each channel
(if the current consumption of each secondary clock is 12mA).
(2) External synchronization function
By connecting with an external master clock generating 30-sec
polarized signal output, the loss/gain of the clock is corrected
(3) Time correction function
By connecting with the GNSS Receiver (GNS-300), the time
correction is made automatically.