Wall-Mount Type QT-7800 Series (2 circuits)
January 26, 2021
Electronic Starting System (PS-1300)
February 14, 2021
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Wall-Mount Type QT-7800 Series (3 circuits)



Secondary clock circuits : 3 circuits

Master Clock

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 24 V; 30-sec. polarized signal; Pulse width of 0.5 sec.; No-contact
  • Max. number of secondary clocks to drive – 90 units(12mA/unit, 30 units/circuit)
  • Maximum driving capacity – 1,080mA(360mA/circuit)
  • Backup power – DC 24V; Built-in sealed Ni-Cd Ni-MH rechargeable battery
  • Battery protection : Overdischarge prevention circuit
  • Signal voltage detection : Signal voltage stopper(stops output when secondary clock driving voltage lowers)

External synchronization input ;DC24V, 30-sec. polarized signal, Every hour (Synchronizable loss/gain range: Less than 15 seconds)

External synchronization output ; RS-422

Time server

  • LAN interface: 10BASE-T, 100BASE-Tx
  • Protocol: SNTPv3, SNTPv4

Yearly Programmable Timer

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 125V 16A, AC 277V 10A, DC 30V 10A
  • Maximum allowable voltage … AC 277V, DC 30V
  • Maximum allowable current … 16A (AC 125V), 10A (DC 30V)
  • Minimum applicable load … DC 5V 100mA

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


  • 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 110V±10%, 50/60Hz
  • QT-78X02 : AC 220V±10%, 50/60Hz

Power consumption : 55W

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×H442×D110 (mm)

Weight : Approx. 10kg


  • Front panel – ABS and steel, pearl gray with a slight gloss
  • Rear panel – Steel, pearl gray with a slight gloss


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


  • GNSS Receiver GNS-300
  • Rack mounting fittings (in accordance with EIA Standard)
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