YEARLY PROGRAMMABLE TIMER (GNSS Synchronization) Wall-Mount Type QT-78101

QT-78101

*GNS-300 is available separately

SEIKO QT-78101 is a high-precision quartz master clock equipped with a yearly programmable timer function. It is so high-quality as well as high-capacity as to allow up to 1,000 steps of programs to be set and have 8 channels of contact signal outputs to control various devices, offering the customers a wide varieties of functions to meet their requirements. In addition, the programs can be set easily using computer application software, and they can be imported into the Yearly Programmable Timer by using USB memory.

(1) Master clock function (QT-78101)

Up to 30 secondary clocks can be connected to each secondary clock circuit (if the current consumption of each secondary clock is 12 mA).

(2) External synchronization function

By connecting a 30-sec. polarized signal with the external synchronization input, the loss/gain of the clock is corrected automatically. Besides, by inputting a serial time signal (RS-422), the clock is kept in constant sync with the input time.

(3) Time correction with GNSS (when connected with an optional GNSS receiver GNS-300)

By connecting a GNSS receiver (GNS-300), the time is automatically corrected on a regular basis. 

(4) Time server function

It can bring the time of secondary clocks, computers, and other devices on the network into sync with the time of QT-78101.

SPECIFICATIONS   Model No. QT-78101

Number of secondary clock circuits:  1 circuit

Crystal oscillator frequency:  4.194304 MHz

Time accuracy:  Weekly rate of less than ±0.7 seconds ( ＋ 5℃～＋ 35℃ ) ; 0 seconds after time correction

Time display

Master clock:  Hour, minute, seconds and date; Year, month, date and day-of-week; Digital 24 hour indication (not displayed during power failure)

Monitor clock:  30-second interval hand movement

Time setting
Master clock:  Setting year, month, date, hour and minute and resetting seconds to “00”
Monitor clock:  60X speed quick advance of hands by APC system

Daylight saving time:  Set by program imported via USB memory
Leap second adjustment:  Setting by operation switches * Leap second adjustment is made automatically.

Driving of secondary clock
Driving signal:  DC 24V 30-sec. polarized signal ; Pulse width of 0.5-sec. ; No-contact
Max. number of secondary clocks to drive:  30 units, 12mA / unit ; 30 units / circuit
Maximum driving capacity:  360mA, 360mA / circuit
Backup power:  DC 24V ; Built-in sealed Ni-Cd rechargeable battery
Battery protection: Overdischarge prevention circuit
Signal voltage detection: Signal voltage stopper function (stops output when secondary clock driving voltage lowers)

External synchronization input:  30-sec. polarized signal, Every hour (Synchronizable loss/gain range: Less than 15 seconds)
RS-422
External synchronization output:   RS-422
Time server:   LAN interface: 10BASE-T, 100BASE-Tx Protocol: SNTPv3, SNTPv4

Control system:   Control by CPU
Output circuit:   8 independent channels; Contact output (make contact)
Switching of output operation:   Manual switching available for each channel (auto, stop and manual)

Load capacity (per circuit):

Resistance load : AC 125 V 16 A, AC 277 V 10 A, DC 30 V 10 A / Maximum allowable voltage : AC 277 V, DC 30 V 

Maximum allowable current : 16 A (AC 125 V), 10 A (DC 30 V) / Minimum applicable load : DC 5 V 100 mA

Output type
Time signal:  Minimum unit of designated time setting : 1 minute / Minimum unit of duration setting : 1 second / Rise time : Selection from 0, -3, -10 and -30 seconds
“Keep”:  Minimum unit of designated time setting : 1 minute / Minimum unit of duration setting : 1 second / Settable range : 1 minute~2 years

Program setting:  Set on PC and imported via USB memory
Program review:  Indicated on LCD digital display by switch operation

Program
Yearly program:  Designating up to 99 weekly programs for Basic, Period, National Holiday, and Special Day settings.
Programmable period : 2 years including this year (Basic setting can be used repeatedly)
Weekly program:  Maximum number of weekly programs engaged : 99
Programmable period : 1 week (can be used repeatedly)

Maximum number of programs engaged: 1,000 steps (total steps in 8 channels)

Input power supply:  QT-78X01:AC 110 V±10%, 50/60 Hz,QT-78X02:AC 220V±10%, 50/60 Hz

Power consumption:  30 W

Power failure backup
Program:  Retention of programs in EEPROM for approx. 10 years
Master clock:  Approx. 5 years (no indication on digital display, counting by internal clock only)
Secondary clock drive:  30 hours (in case of power failure of more than 30 hours, hands are adjusted automatically after recovery.)

Operational temperature range:  -10℃～＋ 50℃

Outer dimensions:  W420×H354×D110mm

Weight Approx.:  8 kg

Enclosure:  Front panel: ABS and steel, pearl gray with a slight gloss / Rear panel: Steel, pearl gray with a slight gloss

Accessories:  Plastic foot, 4 pcs; Miniature fuse; Instruction manual; Mounting hole drilling template;
Insulated crimp terminal; USB memory; and application software

Options:  GNSS Receiver GNS-300; Rack mounting fittings (in accordance with EIA Standard)