Master Clock Class B

1. Automatically receives Beidou (expandable to LTE-4G) time source signals; can provide time to secondary servers and other network devices.
2. Built-in temperature-compensated crystal oscillator, expandable to oven-controlled crystal oscillator based on user requirements.
3. Interface method: Standard RS-422/485.
4. Vacuum fluorescent display (VFD) shows clock source information, signal strength, time and date, data validity, and error status.
5. One time service and communication network port: 10/100M Base-TX Ethernet interface, supports NTP protocol, Transmission Control Protocol/Internet Protocol.
6. Eight RS-485 time service interfaces, supports Modbus protocol.
7. Features fault alarm function and allows querying alarm information on the display screen.
8. Standard timing accuracy: ≤±1S/year.
9. Self-timing accuracy: ≤±0.001S/day.
10. Synchronization error: ≤1~10ms.
11. Expandable redundant main/backup power supply: AC220V ±20% 50HZ±10%.
12. Power consumption: ≤200W.
13. Ambient temperature: -10℃ to +65℃  ;   
14. Relative humidity: 30% to 95%.
15. Mean time between failures (MTBF) ≥80,000 hours.
16. Can support up to: ≤3,000 subsidiary clocks.
17. Can connect to: ≤3,000 secondary master clocks.
18. Cooling method: Natural air cooling.
19. Adopts 2U, 19-inch standard rack-mounted installation.