Model: MC-1-M (2U)
Doc. Ref. no. : - m05/om/101
Issue no. 14
Page 9 of 103
User’s Manual
2. Introduction
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GPS Master Clock model MC-1-M has been developed to address key power and process
industry timing requirements. Whether it’s the monitor, control or analysis of the power system, GPS
Master Clock Model MC-1-M is the cost-effective GPS time synchronization solution.
To begin with, GPS Master Clock model MC-1-M offers precise timing accuracy using GPS satellites; it
generates accurate output pulses and time codes in multiple formats. It’s necessary every time to Lock
GPS once after power ON in order to ensure the better accuracy.
GPS Master Clock Model MC-1-M synchronizes a wide variety of microprocessor-based power system
equipment including: SCADA systems, remote terminal units (RTUs), protection relays, sequence of
event recorders, digital fault recorders, tariff meters, Slave Display Units, Data Loggers and other
Intelligent Electronic Devices (IEDs). Being a Field programmable device using HyperTerminal, a very
common application in Windows or 8 key Keypad provided on the front panel, GPS Master Clock Model
MC-1-M allows the user to alter the settings or choose from Time codes. The serial port COM2
(RS232/RS485 Factory configurable) is provided for that purpose. Each output can feed directly to
different areas through electrically isolated ports which ensure reliable operation in a harsh substation
environment.
GPS Master Clock Model MC-1-M generates a wide range of timing signals via fifteen (Seven ports are
available in factory set configuration) output ports. Standard configurations of GPS Master Clock Model
MC-1-M is equipped with two serial ports, a 1PPS Port, 1 IRIG-B TTL / IEEE 1344 (field configurable) and
three PFC relay outputs for POWER, WATCHDOG, GPS LOST alarm and standard PMOS relay based
pulse output of PPM/PPH or RTC ON event. GPS Master Clock Model MC-1-M is available with optional
feature outputs such as NTP/SNTP, 4 additional PMOS relay based pulse outputs each configurable from
a second to a day period time, IRIG-B127 / IEEE 1344/C37.118-2005 Amplitude modulated output(field
configurable), PTP(Precision time protocol output). Com1 Serial port provides NMEA-0183(RMC) format,
2.048 frequency output. Com2 serial port is configurable for either NGTS or T-format. Another fixed
output provides a very accurate pulse per second with accuracy of (±500ns to UTC). Time
synchronization protocol (NTP) standard as Server mode is implemented in GPS Master Clock Model
MC-1-M to provide time synchronization to different network Clients which are supporting NTP protocols
(NTPv3, SNTP). Additional NTP, IRIG-B TTL / IEEE 1344, IRIG-B / IEE 1344 Modulated and Serial
(NMEA-0183 RMC) optional ports are also available with GPS Master Clock Model MC-1-M product.
GPS Master Clock Model MC-1-M units feature a front panel display, giving both installation teams and
users visual feedback about the time data being generated on the outputs. LED indicators provide “at a
glance” status information.
The optimized Receiver/Antenna system employed in GPS Master Clock Model MC-1-M provides time
information from the GPS satellite constellation. Dynamic T-RAIM processing is used to eliminate any
aberrant satellite signals from the timing solution. The result is timing precision on all outputs with
accuracy similar to that normally seen only in laboratory instruments.
GPS Master Clock Model MC-1-M unit is Rack Mount and its mechanical dimensions are 482.6(W) x
88(H) x 305(D) mm (IP 20 Enclosure).It is supplied complete with all hardware and software required for
the installation, including the Antenna, Antenna mounting kit, 10 meters Antenna cable, 3 meters RS-232
cable and 10 meters RG58 Co-axial cable. (Depends upon commercial terms & condition)
