Ethernet time service explosion-proof clock, explosion-proof electronic clock

1、 Explosion proof electronic clock function
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The electronic clock based on wired time service (network NTP, RS485) or wireless time service (CDMA, 4g-lte or WiFi) can obtain the time of the public network time server and transfer it to multiple electronic hours in RS485 mode
Clock to synchronize the time of each terminal

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Without any key adjustment, the power on can realize the automatic time setting function
The travel time accuracy can be maintained within the error range of 20ms, and the time is set once every 1 minute
There is no cumulative error, which can keep the travel time of the national electronic clock one
To;
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Built in punctuality module, the punctuality ability can reach ＜ 2 minutes / year after losing contact with the network;
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Display contents sometimes, minutes and seconds;
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The server IP address can be set through the supporting upper computer software;
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According to the requirements of users, the power supply can be provided by the network or external power supply

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Embedded installation is convenient, construction is simple, operation is simple, maintenance free;
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High display accuracy, long sight distance, multiple colors of display parts, eye-catching and clear display, black screen in case of fault will not mislead users

2、 Key technical points
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Time synchronization mode
  (1) time service based on NTP network
According to the synchronous travel time of the Ethernet (NTP), the electronic clock synchronizes the local time and the travel time of the timekeeping RTC (clock) circuit every 5 minutes, and uses the timekeeping time within 5 minutes, so as to maintain high accuracy

  (2) high punctuality accuracy, plus or minus 3
5ppm, annual deviation of 2 minutes
The time keeping circuit has a built-in temperature crystal oscillator circuit to compensate for the temperature deviation due to different seasons, so as to adjust the oscillation cycle of the crystal oscillator, so as to make the frequency of the crystal oscillator more accurate, so as to ensure more accurate time

  (3) NTP time service server ensures time accuracy according to CDMA and gps/bd time sources

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The server IP address can be set through the supporting upper computer software;
3、 Main technical indicators of the product
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Communication interface: RJ45, NTP protocol
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Hour, minute and second display size: 0
8 inch
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Automatic timing:
  The synchronization accuracy is 20ms in LAN and 2 seconds in Wan;
  Synchronization frequency: 1 time / minute;
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Temperature:
  Operating temperature range: -10 ℃ ~+75 ℃
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Punctuality accuracy: less than 2 minutes / year
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Working environment:
  Atmospheric pressure: 86kpa~106kpa
  Working environment temperature: -30 ℃ ~+55 ℃
  Storage capacity: -40 ℃ ~+85 ℃
  Relative humidity: 30%~95% (non condensing)
  Cooling: natural air cooling
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Transportation:
  It is suitable for class III road transportation and class 9 earthquake resistance
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Power supply:
  AC: 220v± 20%, 50Hz± 5Hz
  Power consumption: 2
5W
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Display endurance:
  4 hours
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Installation method:
  It can be wall mounted or hoisted through the mounting bracket, and can also be customized according to the site environment
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Reliability:
  System life ≥ 25 years
  Mean time between failures ≥ 45000h
  Mean time to repair ≤ 0
5h
  The system operates normally for more than 40000 hours without manual intervention;
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Dimension (unit: mm): 360&\120; 170x70