7
BKJ2 MODEL
MARINE MASTER-SLAVE CLOCK
DIRECTION
YANTAI HOROLOGY RESEARCH INSTITUTE
SHANDONG
7
BKJ2 MODEL
MARINE MASTER-SLAVE CLOCK
DIRECTION
YANTAI HOROLOGY RESEARCH INSTITUTE
SHANDONG
8
CONTENT
1
、
SUMMARIZATION ..................................................................................... 9
2
、
MASTER TECHONOLOGIC PARAMETER ............................................. 10
3
、
WORK ELEMENT .................................................................................... 10
4
、
PANEL INTRODUCTION ......................................................................... 12
5
、
METHOD OF FIXING, SPAN AND ADJUSTING ...................................... 12
6
、
OPERATION ............................................................................................ 13
7
、
OPERATION OF KEY AND SWITCH....................................................... 13
8
、
ITEMS AND METHOD IN NATURAL MAINTENANCE ............................ 14
9
、
REQUST IN TRANSPORTATION AND STORAGE ................................. 14
10
、
REGARDABLE ITEM ............................................................................. 14
9
1
、
、
、
、
SUMMARIZATION
BKJ2 MODEL MARINE MASTER-SLAVE CLOCK produced in YANTAI HOROLOGY
RESEARCH INSTITUTE SHANDONG specially suit for large ship, as one time service system.
This system consists of one master and more than ten slave clocks, which are connected by signal
cables and power cables. It provides the local time and Greenwich Mean Time (or any desired time)
in parallel.
This system consists of a master clock and slave clocks. Master clock can accept standard
time signal that comes from standard time accepted and managed units, check it’s precision, check
the slave clocks at the same time.
The equipments of this system are controlled by a single piece micro-processor, automatically
and operated easily.
Standard time accepting units provide exact time signal to time system, transmit to master
clock through RS422, adjust the precision of master clock, then keep the systems running without
error.
In the master clock, its central unit (a micro-processor) and many VLSIC chips form the control
unit. It is easy to operate and able to adjust all slave clockwise or counter clockwise, with the high
reliability, it can work at different conditions. A master clock can display by finger and LED method
and realize all functions through adjusting keyboard.
The mater clock can accept standard time signal, adjust it’s precision, keep running without
error. It can transmit signal to slave clocks, adjust them. Slave clocks can run independently. For
special movements, which have feedback function, when communication with the master clock is
ok, the slave clock contrast information to which come from the master clock, run after the master
clock automatically, keep running in parallel. If not connected with the master clock, you adjust time
through keyboard. It is a checked not absolute directed relation between slave clocks and the
master click.
In the power supply of master clock, a AC power detecting circuit is designed, when AC failure
is detected, the circuit drives one relay to switch over from AC power supply to DC 24V power
supply automatically. After AC power recovery, it switches over from DC 24V to AC power supply
automatically.
10
2
、
、
、
、
MASTER TECHONOLOGIC PARAMETER
1. mater clock frequency stabilization: 1
×
10
-7
2. slave clock frequency stabilization: 1
×
10
-6
3. work time: work continually
4. master clock work voltage
：
AC220V
±
10% 50/60Hz
±
5%
DC24V
±
25% Electrical wires are insulated.
work electrical current: 0.5A
5. slave clock work voltage: 24V
work electrical current: about 30mA
6. transmitting distance
≥
300 meter
3
、
、
、
、
WORK ELEMENT
FIGURE 1. SHOWS THE WIRE-DRAWING OF SYSTEM CONSTITUTION
FIGURE 1 SYSTEM CONSTITUTION
1. MASTER CLOCK (FIGURE 2. SHOWS IT)
Controlled by 89C51 single chip, the master clock memory data, operate coding, produce
pulse-signal, transmit to slave clocks through RS422 interface, check slave clocks. At the same
time, master clock accepts standard time from standard time accept units and check the precision
itself.
STANDARD TIME ACCEPT UNIT
MATER CLOCK
SLAVR CLOCK
11
high stabilization
crustal unit
interface
CPU
interface
export interface
slave clock
slave clock
logger
logger
power
standard time
accept unit interface
FIGURE 2 MASTER CLOCK CONSTITUTION
2. SLAVE CLOCK
FIGURE 3 SLAVE ELEMENT
Slave clocks rely on quartz crystal oscillator in itself, through RS422 interface, connect with
cable of master clock directly. Accepting standard time signal from master clock, slave clocks check
their precision, clear up the error automatically, display the uniform time. When they can’t accept
standard time signal, slave clocks can work depending on it’s precision.
There are “ADV” and “REV” methods in slave clock. They can chase time automatically, when
accepting standard time signal, adjust fingers to standard time in short time with the shortest
distance. When it run solely, you can adjust time through keyboard.
POWER
CIRCUIT
CRSTAL
OSCILLATOR
SINGAL
CHIP
MOVEMENT
MASTER
CLOCK
SIGNAL、POWER CABLE
12
4
、
、
、
、
PANEL INTRODUCTION
FRONT PANEL IN BKJ2 MODEL MARINE MASTER-SLAVE CLOCK
3. local (slave clock) finger clock
4. standard (master clock) finger clock
5. standard (master clock) time display window
6. local (slave clock) time display window
7. master clock power
8. slave clock power
9. total power
10. key to adjust master clock time
11. key to adjust slave clock time
12. key to stop second
5
、
、
、
、
METHOD OF FIXING, SPAN AND ADJUSTING
1. fixing
（
1
）
The fixing manner of master clock is hanged or flush type. Fix the clock using fore M4 screws.
（
2
）
The method of BKJ2/-B2
、
B6
、
B9
、
B12 etc slave clocks are same to master clock. Fix them
using three or four screws. Refer to drawing when fixing.
（
3
）
BKJ2/-B3(4) slave clock are inlay type. Fix in the commodious plane, refer to the drawing when
fixing.
13
2. the method of connected with exterior
（
1
）
master clock:
Connect with antenna by Q9 BNC connector plugs, connect with slave clock by four-wire cable.
“T+” in export of master clock correspond with that in slave clock. “T-” ,
“
24V
”
,
“
VSS
”
are same.
Master clock has many exports, try your best to distribute averagely. Require: Connect exactly
according to the marks.
（
2
）
parallel connect all slave clocks through four-wire cable. Require: Connected wire must be
absolutely right, especially power cable must be connected rightly.
6
、
、
、
、
OPERATION
（
1
）
First, check the antenna or cable is OK or NOT, and the cable between master clock with slave
clock is correct or not.
（
2
）
Power cable of AC220V Connect correctly, DC24V also, power switch is set to “OFF”.
（
3
）
Turn on total power switch , at this time neon light should be bright. Two time display windows
show info. Slave click begin to work.
（
4
）
At this time, if two fingers of master clock and slave clock are not on “12” o’clock, they will run
there automatically.
Adjust right key, check the communication of slave clocks.
7
、
、
、
、
OPERATION OF KEY AND SWITCH
1. key in master clock
Key in mater clock can be used to adjust time of master clock.
Press the “HOUR”
、
“MIN” key, hour
、
minute should be adjusted, press once, the amount of
hour and minute will increase or decrease one correspondingly. Press the “+/-” key, can
change the amount of the hour and minute increasing or decreasing. Press the “SEC” key,
second will reset to work from original position.
2. key in slave clock
Key in slave clock can be used to adjust time of slave clock.. The function of the “HOUR”
、
“MIN”
、
“+/-” key are same to which in master clock..
3. power switch in master clock
Power supply in master clock is DC24V. It is provided by two pieces of circuits, one comes from
14
DC24V in alternating current module, the other comes from DC24V provided by storage battery.
4. power switch in slave clock
Power supply in slave clock is same to what in master clock. It is also provided by two pieces of
circuits, one comes from DC24V in alternating current module, the other comes from DC24V
provided by storage battery.
8
、
、
、
、
ITEMS AND METHOD IN NATURAL MAINTENANCE
Keep the equipment in the system dry and clean.
9
、
、
、
、
REQUST IN TRANSPORTATION AND STORAGE
Conveyance manner: Road or railway
Note: Convey carefully, not knock.
require of storage in Short time: Dampproof and dustproof
10
、
、
、
、
REGARDABLE ITEM
Warning: Cable between equipment in the system must be correct, especially power cable
must be conformed to be right, otherwise the equipment will be destr
oyed.