Communication Time System Solutions
Basic Features
The central master clock receives the standard time signal from GPS / Beidou / GLONASS, and is transmitted to the child clock through the interface extension unit, and is provided to other users by the NTP server and the interface extension unit to realize the time synchronization of the whole system.At the same time, the whole system is state monitored through the monitoring computer, and the state information can be provided to the upper monitoring system.
Main Features
System application in today's advanced information technology, absorb the industrial control concept, follow the principle of advanced and practical, consider scalability and compatibility, innovation center monitoring, redundant backup, power protection, fault diagnosis, automatic alarm and other key technologies, realize the high accuracy of system time synchronization and high reliability.At the same time, the appearance design of the equipment and the site decoration style coordinate with each other, to achieve the perfect combination of function and perception.
Technical Parameters
The system adopts two layers of center master clock and subclock architecture, and RS422 / 485 communication.The system, through the original core technology groups such as PPS push-back compensation, high-precision RS422 / 485 time synchronization, output intelligent judgment, parallel non-disturbance redundancy, time closed-loop feedback and whole-system fault detection, solves the accuracy and stability problems of the regional clock synchronization system, and makes the clock synchronization technology ahead of the international level.The system is mainly used in regional clock synchronization, such as railway stations, bus stations, power plants, standard plants, TV stations, school stations, hospitals, intelligent buildings, sports factories and other occasions.
System Parameters
| 1) System Architecture: | Two layers |
2) Communication protocol: | Dedicated RS422/RS485 and NTP protocols |
3) Communication distance: | ≤1200m (over 1200m add repeater) |
4) Number of secondary master clocks: | Can bring pointer sub-clocks and digital sub-clocks 320 faces |
5)System synchronization error: | Sub clock≤10ms, NTP server≤2ms |
Device parameters
| GPS/Beidou/GLONASS Signal Receiving Unit | |
| 1) Operating temperature: | -30℃～+65℃ |
2) Relative Humidity: | ≤95% |
3) Frequency stability: | 10-12～10-9 |
| 10-12～10-9 | |
4) Sync Error: | GPS≤50ns, Beidou≤100ns, GLONASS≤30ns |
5) Signal transmission distance: | ≤1200m |
6) Interface: | Standard RS422/485 |
7) Antenna feeder length: | 5～100m (standard 30m) |
8) Power supply: | AC220V±15% 50Hz±5% |
| 9）power dissipation： | ≤20W |
| 10）MTBF： | ≥85,000 hours |
| 11）antenna： | dustproof, waterproof, anti-corrosion and lightning protection |
Secondary Master Clock | |
1) Self-timer precision: | ±0.01s/d |
2) Working temperature: | -10℃～+65℃ |
3) Relative Humidity: | ≤95% |
4) Interface: | Standard RS422/RS485/RS232/NTP |
5) Number of standard output ports: | 2 |
6) The number of sub-clocks that can be built: | ≤320 sides |
7) Power: | AC220V±15% 50Hz±5% |
8) Power consumption: | ≤20W |
| 9) MTBF: | ≥85,000 hours |
| NTP server | |
| 1) Operating temperature: | -10℃～+65℃ |
| 2) Relative Humidity: | ≤95% |
| 3) Sync Error: | ≤2ms |
| 4) Output interface: | 10BaseT/100BaseT Ethernet interface |
| 5) Number of output ports: | 1 to 4 |
| 6) Client capacity: | 8000 times/sec |
| 7) Protocol: | SNTP/NTP V2, V3, V4, etc. |
| 8) Management port: | remote management via ethernet interface |
| 9) Power supply: | AC220V±15% 50Hz±5% |
| 10) Power consumption: | ≤10W |
Analog Clocks | |
1) Self-precision: | ±0.05s/d |
2) Output torque: | 800～1200g.cm |
3) Working temperature: | -35℃～+70℃ |
4) Relative Humidity: | ≤95% |
5) Working voltage: | AC220V±15% 50Hz±5% |
| 6) MTBF: | ≥85,000 hours |
Digital Clock | |
| 1) Self-precision: | ±0.05s/d |
| 2) Working temperature: | -35℃～+70℃ |
| 3) Relative Humidity: | ≤95% |
| 4) Working voltage: | AC220V±15% 50Hz±5% |
| 5) LED luminous intensity: | ≥1000mcd |
| 6) MTBF: | ≥85,000 hours |