GPS Master Clock System

GPS Master Clock System

GPS Master Clock – Redundant GPS Master Clock System (MCS-GPSMC-1010) is a 3U Card rack type, 19” Rack mountable Redundant GPS Time Server. GPS Master Clock is to synchronize and maintain the timing and frequency requirement of power and process industry equipment using signal obtained from different external sources such as globally available satellite systems GPS, GLONASS, Galileo and IRIG and distributing the same through several types of interfaces.

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It will provide redundancy for Power, GPS receiver to increase the reliability and offering protection against the failure. The system is field-upgrade able and extremely flexible system, designed to handle time synchronization requirements today and in the future. It can provides nanosecond accuracy when external time references are not available. It has the storage facility to store the system log file. It can deliver IPv4 / IPv6 supported IEEE 1588 (PTP V2), NTP, SNTP, IRIG-B, PFC-Pulse, DCF77,BCD parallel data, Ethernet Fiber Optic & RS485/RS232 outputs. System can be configure and monitoring through Web-based application. Up to Three power supplies can be installed, increasing reliability and offering protection against the failure of power sources. Wide range of power supply either 90V-260V AC/DC or 18-36VDC or 36V-72VDC power supply model can be mixed and matched as required by the user, depending upon power supply options available at the installation site.


Power Supply
Standard 18V to 36V DC (24V)
Custom 36V to 72V DC (48V), 85 to 260V AC, 1φ, (47Hz to 63Hz) or 90V to 370V DC
Power Consumption <50W
Note: Redundant power supply input available*
GPS Receiver & Antenna
Configuration Single Antenna

Dual Antenna*

Timing Accuracy < 20nS RMS Accuracy
Output Impedance 50Ω
Frequency 1575.42 ±1.023MHz
Environmental All weather proof Antenna, IP67
Satellite tracking 12 Channels, C/A code
Coverage 360°Azimuth, 0°- 90°Elevation
User Interface
LCD Display 2×20 Alphanumeric
Keypad UP, Down & Enter
Alarm PFC contact for GPS Fail, Comparator Fail & Power Fail
Configuration port 10/100Mbps Ethernet
Operating Temp 0°to 50°C
Humidity 95% Non Condensing
Enclosure 3U, 19” Rack Mountable
Dimension 132mm (H) x 484mm (W) x 300mm (D) +5mm
Weight <6Kg
Protection Class IP20
RS232 Output*
Output Modbus, NMEA and standard formats
Number of Output 4Nos Max per card
Connector DB9, Female
RS485 Output*
Output IRIG-B,Modbus, NMEA and STD formats
Number of Output 8Nos Max per card
Connector Pluggable Terminal Block
BCD Output*
Recommended input voltage range 24V/0.2A  +10%
Number of Output 2Nos Max per card
Connector DB37, Female
Event Output (Pulse Output)*
User Configurable Pulse output PFC, 250V AC/DC, 0.2A
Connector Pluggable Terminal Block
Number of Output 8Nos Max per card
IRIG-B Output*
Amplitude Modulation (AM) Carrier           :1kHz
Format            :User Selectable
Modulation Ratio  :3:1
Unloaded Voltage  :0-5V (p-p)
Loaded Voltage    :0-3V (p-p) 150 ohm
Accuracy          :<3 us to PPS
Maximum Distance  :3km
Pulse Width Modulation (PWM/ TTL) Logic 0           :0V +250mV
Logic 1           :5V +250mV
Format            :User Selectable
Accuracy          :<200ns to PPS
Rise Time         :<15ns
Maximum Distance  :50m
Number of Output 4Nos Max per card
Connector BNC,75Ω, Female
Ethernet Output*
Protocol NTP, SNTP, SNMP** & PTP**
Speed 10/100MBps, 10/100/1000MBps**
Connector RJ45
Maximum Distance 100m max without switch.
Number of port Max 4 x 10/100MBps per card
**Max 2 x 10/100/1000Mbps per card
Fiber Optic Output*
TTL(Pulse/IRIG-B TTL) On FO Transmission  : Simplex
No of output  : 4No Max per card
Mode          : Multimode
Connector     : SC/ST
Wavelength    : 820nm
Distance      : 1500m
Ethernet On FO Transmission  : Duplex
No of output  : 2No Max per card
Mode          : Multimode/Singlemode
Connector     : SC/ST/FC
Wavelength    : 1310nm
Distance      : 2000m
DCF77 Output*
Recommended input voltage range 24V/0.2A  +10%
Number of Output 4Nos Max per card
Connector Pluggable Terminal Block
Note:* Optional

Maximum of 6 Output cards can be used, while Single power supply input being used.

Maximum of 5 Output cards can be used, while Redundant power supply input being used.


  • GPS Satellite Time reference for the System.
  • Redundant GPS and Master with Comparator
  • Provides optional TCXO/OCXO stability without GPS input.
  • Field configurable pulse outputs
  • 10/100MBps NTP & SNTP Ethernet time outputs
  • Provides IRIG-B AM and TTL time signals.
  • MODBUS output over RS485/RS232 and BCD outputs
  • Fiber Optic Pulse and Ethernet Outputs
  • Adjustable Time Zone
  • 3U Rack Mountable with removable output cards
  • Have more number of output to meet Power plant requirements
  • Redundant Power supply can be added
  • All weather proof Antenna