GPS Slave Clock

GPS synchronized clock system offers accurate time to all clocks in the system. The GPS clock synchronization system consists of a master clock and multiple slave clocks. The master clock communicates with all the salve clocks via wired/wireless medium in the system to provide them with an accurate time source. The objective of the GPS synchronized clock system is to make sure that all clocks in the system display the same time. Regardless of which part of the building you are in, the time shown by the clocks will be uniform and accurate.

GPS synchronized clock system is a cost-effective design to synchronize the clock to accurate time with respect to universal time coordinates. In GPS synchronized clock system, the master clock receives time from either an NTP server or GPS receiver, then the time is distributed to all slave clocks in the system and ensuring that all clocks stay synchronized and do not drift from their accurate time. GPS clocks continue to work during power outages, adjusting to re-acquire the precise GPS time once power is restored. In the case of non-availability of the GPS signal, the slave clocks have an inbuilt RTC ( Real-Time Clock) to continue showing the accurate time.GPS synchronized clock automatically adjusts for Daylight Saving Time ( DST ). The slave clock is wall/panel / tabletop mountable. The cabinet is made up of Mild Steel or Aluminium or Stainless steel as per customer requirements. The slave display can show either UTC time or local time. Slave clocks are available in 50mm, 100mm, 144mm & 300mm sizes.



  • High bright 7 segments LED displays to show GPS Time
  • 5 x 7 Dot Matrix LED displays day of the week
  • Accepts Time Signals like NTP, IRIG-B and RS485/RS232
  • Available in 50mm, 100mm, 144mm & 300mm sizes
  • Time updates with high stability oscillators option available
  • The input power supply can be customized
  • 10/100MBps NTP & SNTP Ethernet for time input
  • Power Over Ethernet option available
  • Display running with battery backup option available
  • Wireless display option available
  • It can show either UTC or Local time
  • Adjustable Time Zone, DST, 12/24Hrs in Ethernet Display
  • Rugged and Robust displays
  • Isolated and protected Interfaces.
  • Battery backup provided for the time update
  • Cabinets made up of MS/SS/Aluminium
  • The cabinet is powder coat finished
  • Wall / Panel / Tabletop mountable
  • Protection class – IP 20
  • Time signal Input status and GPS lock Status can be identified with colon LEDs
  • Front plate covered with Red color acrylic sheet
  • Event Loggers
  • Substation
  • Airport
  • Railway station
  • Bus stand
  • Industries
  • Hospital
  • Colleges & Schools
  • Malls
Power Supply
Standard 85 to 260V AC, 1φ, (47Hz to 63Hz) or 90V to 370V DC
Custom 36V to 72V DC (48V), 18V to 36V DC (24V)
Power Consumption <10W

Note:  Power Over Ethernet available for Ethernet display*

Input Signal
RS485/RS422 Input

String: Proprietary or NMEA**

Connector: Pluggable Terminal block


COM Method: Unicast

Connector: RJ45

Speed: 10/100Mbps


Carrier: 1kHz

Modulation Ratio: 3:1

Recommended Vin   : 1V-7V (p-p)

Connector: BNC Female


String: Proprietary or NMEA**

Connector : DB9 Female

Note:  RF-based Wireless slave clock will receive a signal from another unit which has Wireless Transmitter and GPS Antenna*

Display Type 7 Segment & 5×7 DOT Matrix Display
No of Digit 6 Digit or 8 Digit***
Time Display HH:MM: SS
Date Display* DD:MM: YY or DD:MM: YYYY***
Day Display* First 3 Characters. Ex: SUN .. SAT
Display Size 50mm/100mm/144mm/300mm
Color Bright Red
Operating Temp 0°to 50°C
Humidity 95% Non-Condensing
Enclosure Wall/Panel/Table Top Mountable
Protection Class IP20

Battery backup provided for RTC/TCXO may be used to meet high stability during free-running mode*.

Contact SANDS for the actual dimension of each model.

* Optional

** GPZDA & GPGGA combined string

*** Only for Date display