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QC-6A

High accuracy

Highly stabilized quartz oscillator guarantees

remarkable precision for the whole system.

Large capacity

Up to 50 secondary clocks can be linked to the master

clock.

Flexible voltage transformer

No more voltage fluctuation thanks to a new power

supply circuit.

Built-in battery

Back-up power supply for the master clock.

Automatic re-adjustment

Even during power failure, all the secondary clocks are

driven by the optional battry unit B-450(stand-by

battery unit B-450 for secondary clocks optionally

available).

Accuracy and Synchronization of

Secondary Clocks

How to Drive 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 quartz oscillation frequency of 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 30-sec. polarized signal of ±24 V 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.

AC/DC operation

Operates on either AC or DC power supply.

Neutral position

Negative position

30sec. 30sec. 30sec.

Positive position

＋24V

−24V

MASTER CLOCK

CONTENTS SPECIFICATIONS

Accuracy

Within ±0.2 sec./day (＋5℃∼＋35℃)

Monitor

Analogue clock with second inidication

(Red LED)

Output

A : 30-sec. polarized for secondary clocks

B : 1-min. non-polarized for peripheral equipment

C : 1-sec. non-polarized for peripheral equipment

Output signals

A＋B : 600mA

C : 10mA

Output capacity

A, B, C : 500ms

Pulse length

A, B : DC12V

C : Open collector

Output voltage

Power Supply

AC input

100∼250V±10%

Voltage selector“H”and“L”

DC input

22∼35V

Ripple : less than 1 V peak to peak, Max. 2A

Protector

Fuse provided

Built-in Battery

Guaranteed

duration

Battery

Indication of

power failure

During a power failure, the monitor clock, all

secondary clocks and LED lamp will stop.

They will be corrected automatically after

power is resumed.

Approx. 10∼12 hours

Ni-Cd

LED lamp off

Correction

of Time

Method

Automatic pulse control

Speed

30 times faster than nomal

Setting the Time

Manual

0 second setting swith provided

Dimensions

300(W)×320(H)×115 ( D ) mm

Weight

5.0kg

1 2 3 4 5 6 7 8 9 10 11 12

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