Seiko Time Creation QT-7810/QT-78102 Yearly Programmable Timer

Manufacturer: Seiko Time Creation Inc.
Model: QT-7810/QT-78102

Overview

The SEIKO QT-7800 Series is a high-precision quartz master clock with a yearly programmable timer. It supports up to 1,000 program steps and 8 contact signal outputs for controlling devices. You can set programs via computer software and import them using USB memory.
Master Clock Function (QT-7810X, QT-7820X, QT-7830X): Connect up to 30 secondary clocks per circuit (if each clock draws 12 mA).
External Synchronization: A 30-sec. polarized signal input automatically corrects time loss or gain. RS-422 input ensures constant synchronization with the time signal.
GNSS Time Correction: When connected to a GNSS receiver (GNS-300), the clock regularly corrects the time.
Time Server: Sync secondary clocks, computers, and other devices on the network with the QT-7800 Series time.

Specification

Functions
Secondary clock circuits	1 circuit
Master Clock
Crystal oscillator frequency	4.194304 MHz
Time accuracy	Weekly rate less than ±0.7 seconds (+5°C~+35°C); 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)
Time display (Monitor clock)	30-second interval hand movement
Time setting (Master clock)	Setting year, month, date, hour and minute and resetting seconds to ‘00’
Time setting (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 signal	DC 24 V; 30-sec. polarized signal; Pulse width of 0.5 sec.; Nb=contact
Max. number of secondary clocks	30 units (12mA/unit, 30 units/circuit)
Maximum driving capacity	360mA (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 by CPU
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 to 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 reused 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
Input Power Supply	QT-78X02: AC 220V ±10%, 50/60Hz
Power consumption	30W
Power failure backup	Program: Retention of programs in EEPROM for approx. 10 years
	Master clock: Approx. 5 years
	Secondary clock drive: 30 hours (auto-adjustment after recovery)
Operational temperature range	-10°C to +50°C
Outer dimensions	W420 x H354 x D110 (mm)
Weight	Approx. 8kg
Enclosure	Front panel: ABS and steel, pearl gray with slight gloss
Enclosure	Rear panel: Steel, pearl gray with 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 (EIA Standard)

Remarks

EIA compliant（Options）
E354
Outer dimensions: W480×H354 (mm) (when mounted to the main body)
Weight: Approx. 2 kg
Casing finish: stainless steel with coating finish (pearl gray with a slight gloss)
E442
Outer dimensions: W480×H442 (mm) (when mounted to the main body)
Weight: Approx. 2.5 kg
Casing finish: stainless steel with coating finish (pearl gray with a slight gloss)