GPS Master Clock System
GPS Master Clock System GPS Master Clock System


GPS Master Clock System – MCS-GPSMC-1010 is a 3U Card rack type, 19” Rack-mountable Redundant GPS Time Server which synchronizes and maintains the timing and frequency requirement of power and process industry equipment using a signal obtained from any one of the sources like GPS or GLONASS or  NAVIC and time protocols such as NTP and IRIG. It distributing the same time signal through several types of interfaces. It provides redundancy for Power and GPS receiver to increase reliability and offers protection against time synchronization failure. The system is field-upgradeable and an extremely flexible system, designed to handle time synchronization requirements today and in the future. It provides nanosecond accuracy when external time references are not available. It has a storage facility to store the system log file. It delivers NTP, SNTP, IRIG-B, PFC-Pulse, DCF77, BCD parallel data, Ethernet Fiber Optic & RS485/RS232 outputs. System enables configuration and monitoring through Web-based application. It supports a 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.


  • GPS Satellite Time reference for the System
  • Redundant GPS and Master with Comparator
  • Provides optional TCXO/OCXO stability
  • Cable delay compensation available
  • Field configurable pulse outputs
  • 10/100/1000Mbps PTP, 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
  • Events storage facility
    3U Rack Mountable with removable output cards
  • Isolated and protected Interfaces
  • Have more number of output to meet Power plant requirements
  • The redundant Power supply can be added
  • Large size time Displays, Signal conditioners & Boosters provided as per requirements
  • Cable length can be supplied as per requirement
  • 2×20 LCD with sufficient keys and Status LED
  • Battery backup provided for the time update
  • Alarm Contact provided for the annunciation
  • All weatherproof Antenna


  • Event Loggers
  • Disturbance Recorders
  • Electronic tri-vector meters
  • Phasor measurement unit
  • SCADA servers
  • Numeric Relays
  • Slave clocks
  • Servers of EMS
  • Electronics Instruments
  • Standalone computers


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 <70W
Note: Redundant power supply input available*
GPS Receiver & Antenna

Single Antenna

Dual Antenna*

Timing Accuracy < 25nS RMS Accuracy
Output Impedance 50Ω
Frequency 1575.42 ±1.023MHz / 1602MHz/1176.45MHz
Environmental All weatherproof Antenna, IP67
Satellite tracking 12 Channels, C/A code GPS/GLONASS/NAVIC
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
Event Output (Pulse Output)*
User Configurable Pulse output PFC, 250V AC/DC, 0.2A (PPS, PP5S, PPM, PPQH, PPHH, PPH, PPD)
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 : 260ns

Maximum Distance : 3km

Pulse Width Modulation (PWM/ TTL)

Logic 0 : 0V +250mV

Logic 1 : 5V +250mV

Format: User Selectable

Accuracy : 260ns

Rise Time : <15ns

Maximum Distance: 50m

Number of Output 4Nos Max per card
Connector BNC,75Ω, Female
Ethernet Output*
Protocol NTP, SNTP & PTP*



Connector RJ45
Maximum Distance 100m max without a switch.
Number of Output

4Nos Max per card with NTP & SNTP

2Nos Max per card with PTP, NTP & SNTP

Accuracy NTP/PTP 1ms/100ns
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
Fiber Optic Output*

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
BCD Output*
Recommended input voltage range 24V/0.2A +10%
Number of Output 2Nos Max per card
Connector DB37, Female

* 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