Alstom Reason RT434 Technical Manual
  1. Manuals
  2. Brands
  3. Alstom Manuals
  4. Clock
  5. Reason RT434
  6. Technical manual
Alstom Reason RT434 Technical Manual

Alstom Reason RT434 Technical Manual

Gps grandmaster clock
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
© ALSTOM 2014. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be
relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is
provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is
strictly prohibited.
Reason RT434

Technical Manual

GPS Grandmaster Clock
Platform Hardware Version: A
Platform Software Version: 05
Publication Reference: RT434-TM-EN-
2

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the Reason RT434 and is the answer not in the manual?

Questions and answers

Summary of Contents for Alstom Reason RT434

  • Page 1: Technical Manual

    Publication Reference: RT434-TM-EN- © ALSTOM 2014. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice.

  • Page 2: Table Of Contents

    GPS Grandmaster Clock Contents TECHNICAL MANUAL PREFACE ACRONYMS AND ABBREVIATIONS DESCRIPTION INTRODUCTION FOREWORD KEY FEATURES AVAILABLE MODELS 1.4.1 NETWORK PORTS 1.4.2 POWER SUPPLY FRONT AND REAR VIEWS TECHNICAL SPECIFICATIONS 1.6.1 POWER SUPPLY 1.6.2 GPS ANTENA INPUT 1.6.3 INTERNAL OSCILLATOR 1.6.4 TTL LEVEL ELECTRICAL OUTPUTS (IRIG-B004/PPX/DCF77) 1.6.5 OPEN COLLECTOR ELECTRICAL OUTPUTS...
  • Page 3 RT434 MOUNTING CONNECTORS POWER SUPPLY 2.6.1 AC POWER CONNECTION 2.6.2 DC POWER CONNECTION POWERING UP GPS ANTENNA TERMINAL TTL ELECTRICAL OUTPUTS 2.10 OPEN-COLLECTOR ELECTRICAL OUTPUTS 2.11 OPTICAL OUTPUTS 2.12 AMPLITUDE MODULATED OUTPUTS 2.13 SERIAL PORT (RS232, RS422/485) 2.14 DRY-CONTACT RALAY (LOCKED) 2.15 EVENT INPUT 2.16...
  • Page 4 GPS Grandmaster Clock 4.3.3 CONFIGURATION SUMMARY SYNCHRONISM OUTPUTS 4.4.1 OUTPUTS 4.4.2 SERIAL DATAGRAM 4.4.3 CUSTOMIZABLE DATAGRAMS 4.4.4 SENDING CONFIGURATION 4.4.5 CONFIGURATION SUMMARY PTP CONFIGURATION 4.5.1 PROFILE 4.5.2 DOMAIN NUMBER 4.5.3 NETWORK PROTOCOL 4.5.4 OPERATION MODE 4.5.5 DELAY MECHANISM 4.5.6 MASTER AND SLAVE CLOCKS 4.5.7 PTP MESSAGES 4.5.8...
  • Page 5 RT434 6.1.4 SINAL IRIG-B 6.1.5 PTP PROTOCOL 6.1.6 NTP PROTOCOL 6.1.7 SNTP PROTOCOL BATTERY REPLACEMENT FIRMWARE UPDATE EQUIPMENT KEY CHANGE CLEANING INSTRUCTIONS RETURNING THE EQUIPMENT APPENDIX A -CORTEC APPENDIX B -IRIG-B STANDARD SUMMARY APPENDIX C - PTP STANDARD CONCEPTS (IEEE1588) APPENDIX D –...

  • Page 6: Preface

    Products developed by Alstom are continuously improved. The information this document contains reflects this improvement, and for this Alstom it is subject to change without notice. Please make sure that this is latest version of this document before proceeding. All specifications are subject to changes without prior notice.

  • Page 7: Acronyms And Abbreviations

    RT434 ACRONYMS AND ABBREVIATIONS AC - Alternating Current; ACEB NEMEA - Acronyms and Abbreviations; ASCII - American Standard Code for Information Interchange; BMC - Best Master Clock; BNC - Bayonet Neil Concelman connector; Bps – Bytes per second; bps - Bits per second; CAT5 - Network Cable;...
  • Page 8 GPS Grandmaster Clock GPS - Global Positioning System; GPZDA - Serial Datagram format; HTTP - Hypertext Transfer Protocol; HTTPS - Hypertext Transfer Protocol Secure; IEC - International Electrotechnical Commission; IED - Intelligent Electronic Devices; IEEE - Institute of Electric and Electronic Engineers; IHM - Human-Machine Interface;...
  • Page 9 RT434 RT - Temporal Recorder (Alstom's Temporal Synchronization Equipment); RX - Receiving data; SNMP - Simple Network Management Protocol; SNTP - Simple Network Time Protocol; ST - Bayonet-lock connector; TCP - Transmission Control Protocol; TMARK - Daily pulses with programmable time;...

  • Page 10: Description

    GPS Grandmaster Clock 1. DESCRIPTION Introduction RT434 - GPS Grandmaster Clock is a clock referenced to GPS satellites, whose main application is to be a source of temporal synchronization signals in different formats and protocols to synchronize internal clocks of equipment and systems based on digital processing.

  • Page 11: Foreword

    RT434 as a source of timing for different electronic devices. Foreword This technical manual provides a functional and technical description of Alstom Grid's RT434, as well as a comprehensive set of instructions for using the device. We have attempted to make this manual as accurate, comprehensive and user-friendly as possible.

  • Page 12: Available Models

    GPS Grandmaster Clock Pulses: 100 pulses-per-second, 1 pulse-per-second, 1 pulse-per-minute;  Freely configurable low frequency pulse generator from 1 pulse-every-60-seconds to 1 pulse-every-24-  hours; Pulse on-time with daily repetition;  User-configurable rules for daylight-saving-time and configurable time zone;  Delay compensation for GPS antenna cables;...

  • Page 13: Network Ports

    RT434 For information about the different models, go to the order code on datasheet of the equipment. Network Ports 1.4.1 Each network interface can have the configuration shown in the table below: TABLE 1.1: Possible configuration of Ethernet ports according to the enabled and blocked features. ETHERNET PORT 1 ETHERNET PORT 2 ETHERNET PORT 3...

  • Page 14: Power Supply

    GPS Grandmaster Clock Power Supply 1.4.2 It is also possible to obtain equipment with one or two power supply sources option, the second used for redundancy. Each power supply source can have the configuration shown in the table below: TABLE 1.2: Possible configuration of the power supply source. POWER SUPPLY 1 POWER SUPPLY 2 Not applicable...
  • Page 15 RT434 The L indicator on, indicates that the equipment is synchronized with time reference from at least 4 GPS OCKED satellites. The Alarm indicator on, indicates that the equipment is not operating and it is necessary the operator's attention. Figure 2, shows the equipment's rear panel components.

  • Page 16: Technical Specifications

    GPS Grandmaster Clock Technical Specifications Power Supply 1.6.1 TABLE 1.3: Power supply specifications. Operating voltage range 80-275 V d.c., 88-264 V a.c. Frequency 50/60 Hz ± 3Hz Power input GPS Antena Input 1.6.2 TABLE 1.4: GPS Antenna input specifications for temporal synchronizationl. Signal GPS L1 (1575.42 MHz), C/A code Sensibilivity...

  • Page 17: Internal Oscillator

    RT434 Internal Oscillator 1.6.3 TABLE 1.5: Internal oscillator specifications. Drift (without external reference) < 0.1 ppm ( TTL Level Electrical Outputs (IRIG-B004/PPx/DCF77) 1.6.4 TABLE 1.6:Electrical outputs specifications 4 screw ( two outputs) Connectors (4) 2 BNC High Level 1 >4,8 Vd.c. Low Level 2 <0,2 Vd.c.

  • Page 18: Optical Outputs

    GPS Grandmaster Clock Optical Outputs 1.6.6 TABLE 1.8:Optical outputs specifications. Connector Weve-length 820 nm Multimodo 50 / 125 µm, 100 / 140 µm ou 200 µm Fiber Type - 17.8 dBm (50 / 125 µm) - 14.0 dBm (62.5 / 125 µm) Emission power - 8.5 dBm (100 / 140 µm - 5.7 dBm (200 µm HCS)

  • Page 19: Serial Port (Rs232, Rs422/485)

    RT434 Serial Port (RS232, RS422/485) 1.6.8 TABLE 1.10: RS232 or RS422/485 serial port specifications. Signal Level RS232 ou RS422/485 1200, 2400, 4800, 9600, 19200 ou 38400 Bitrate Databits 7 ou 8 Stopbits 1 ou 2 Parity none, even or odd Connector DB9 (male), standard DTE Dry-contact Relay (L...

  • Page 20: Event Input

    GPS Grandmaster Clock Event Input 1.6.10 TABLE 1.12: Event Input specification. Signals PPS, PPM or other variable frequency signals Voltage Level Precision Time Protocol PTP (IEEE 1588) 1.6.11 TABLE 1.13: PTP time synchhronization protocol specifications. UDP/IPv4 (Leyer 3) (Multicast/Unicast) Protocols IEEE 802.3 (Leyer 2) (Multicast) End-to-End (Multicast/Unicast) Delay Compensation...

  • Page 21: Ethernet Ports

    RT434 Ethernet Ports 1.6.12 TABLE 1.14: Ethernet ports specification. Transmission Rates 10/100 Mbps Connector RJ45 NTP v2 (RFC 1119) NTP v3 (RFC 1305) NTP v4 (sem RFC) Protocols SNMTP IEEE 1588 PTP HTTP Environment 1.6.13 TABLE 1.15:Environment specification. Operating Temperature -40 …...
  • Page 22 GPS Grandmaster Clock TABLE 1.16:Dimensions and weight specification. Height Width (bory) 430 mm (16.9 in) Depth 180 mm (7.1 in) Weight 2.7 kg (5.9 lbs) RT434 dimensions are shown on figure Figure 3: RT434 Dimensions RT434-TM-EN-2...

  • Page 23: Installation

    Check the contents against the packing list that goes with the product. If any of the content listed are missing, please contact Alstom (see contact information at the beginning of this manual). Examine the unit for any shipping damage. If the unit is damaged or fails to operate, notify the shipping company without delay.

  • Page 24: Environment

    GPS Grandmaster Clock Environment Temperature and relative humidity should not exceed the limits stated in chapter 1. We recommend you to provide appropriate heating or cooling measures to ensure that these limits are respected at all times. Mounting RT434 has been designed to be mounted in a standard 19-inch rack using four M6x15 screws to affix. Allow adequate clearance for all connections.

  • Page 25: Power Supply

    RT434 2 electrical output for synchronism with TTL level screw connector, one of them insulated; 2 open collector output; contactor relay; OCKED And 1 CMOS/TTL level even input. 1 modulated-amplitude output for IRIG-B124 signal 2 optical outputs for synchronism RS232 and RS422/485 serial port Communication ports via Ethernet network GPS antenna input Power Supply...

  • Page 26: Ac Power Connection

    GPS Grandmaster Clock The pin terminals should be completely inserted into the connector supplied with the unity so that no metallic parts are exposed, according to the figure Figure 7:Supply connector assembly A 1.5 mm² ground lead shall be connected to the terminal marked with the protective earth symbol for safety. For optimal electromagnetic compatibility, ground the unit by using a 10mm wide grounding strap to connect the rear panel of the unit to a good ground point on the mounting rack.

  • Page 27: Dc Power Connection

    RT434 DC Power Connection 2.6.2 Positive should be applied to terminal +/L, negative to terminal -/N in each of the supply terminals identified as Power 1 and Power 2 as shown in figure Figure 9: DC power connection Installation of an external 10 A, category C, bipolar circuit breaker near the unit is recommended. The circuit breaker should have an interruption capacity of at least 25 kA and comply with IEC 60947-2 standard.

  • Page 28: Gps Antenna Terminal

    GPS Grandmaster Clock In case the unit does not behave in a way here described, carefully check all power and signal connections. See chapter 6 for additional suggestion for problem diagnosis. GPS Antenna Terminal A 3.3-Volt active GPS antena (100mA max) must be connected to the antenna terminal if GPS satellites are used as time reference.
  • Page 29 RT434 Figure 11: Recommended position for installing the GPS Antenna The antenna should not be located under overhead power lines or other electric light or power circuits, or from where it can fall onto such power lines or circuits. An antenna mast of roof-mounting-kit and any supporting structure must be properly grounded to provide protection against voltage surges and built-up static charges.

  • Page 30: Ttl Electrical Outputs

    Figure 12: Posição recomendada para instalação do eletroduto da antena GPS Cables with lengths ranging from 15m (50 ft) to 150 m (492 ft) can be purchased from Alstom. For use of antennas and cables from other manufacturers, contact Alstom.

  • Page 31: 2.10 Open-Collector Electrical Outputs

    RT434 chapter 1 for more description of signal levels and maximum charge. The type of signal at each output can be configured through a Web Interface to generate IRIG-B004, DCF77, 1PPS, 1PPM, 100PPS, or any custom-defined low frequency, from 1 pulse-every-two-seconds to 1 pulse-per-day. It is also possible to configure the outputs to generate daily set-time pulses.

  • Page 32: 2.11 Optical Outputs

    GPS Grandmaster Clock Figure 15: Connection diagram of the open-collector electrical outputs To scale the resistor use the relationship: Where V is the external voltage to be switched by the open-collector output. The resistor power should be adequate for the voltage and current values to be switched, i.e. Do not connect the open-collector electrical outputs without an external resistor properly sized or another appropriate mechanism to limit current.

  • Page 33: 2.12 Amplitude Modulated Outputs

    RT434 RT434 has 2 outputs for multimode optical fiber, shown in figure Figure 16: Optical outputs The length of fiber-optic cables shall not exceed 2km. See charpter 1for optical outputs technical information. The type of signal at each output can be configured through a Web Interface to generate IRIG-B004, DCF77, 1PPS, 1PPM, 100PPS, or any custom-defined low frequency, from 1 pulse-every-two-seconds to 1 pulse-per-day.
  • Page 34 GPS Grandmaster Clock RT434 has 1 RS232 and RS422/485 serial port output with a DTE pin-layout, shown in figure 18 to send datagrams. Figure 18: Serial port RS232 e RS422/485 The serial port is compatible with RS232 and RS422/485 standard, and it has the following pinout: TABLE 2.2:Serial port pinout.

  • Page 35: Dry-Contact Ralay (Locked)

    RT434 Appendix E illustrates application architectures using the serial port with RS232 and RS485 standard. 2.14 Dry-contact ralay (L OCKED RT434 has 1 dry-contact used for remotely signaling the synchronism state of the unity, shown in figure 19. Length of cables connected to these terminals should not exceed 5m (16ft). See chapter 1 for information on switching capacity limitations.

  • Page 36: 2.16 Type Tests

    GPS Grandmaster Clock Figure 20: Event input This input can be used to verify the PTP signal quality when RT434 is used as slave (PTP signal receiver from external source via network). To use the event input to verify the signal quality, a synchronism output of an external source connected to the event input should be used, as shown in figure 21.
  • Page 37 RT434 Differential mode: 1KV IEC 61000-4-5:2005 Common mode: 2KV IEC 61000-4-6:2008 IEC 61000-4-8:2009 30A/m continuos - 300A/m @ 1s. RT434-TM-EN-...
  • Page 38 GPS Grandmaster Clock A.C. and d.c. voltage dips Test level: 0% residual voltage Duration time a.c.: 1 cycle d.c.: 16,6ms Test level: 40% residual voltage Duration time a.c.: 12 cycles d.c.: 200ms IEC 61000-4-11:2004 IEC 61000-4-29:2000 Test level: 70% residual voltage Duration time a.c.: 30 cycles d.c.:500ms...
  • Page 39 RT434 Test level: 15 % of rated d.c. value IEC 61000-4-17:1999 Test frequency: 120Hz, sinusoidal waveform. Voltage oscillation frequency: 1MHz IEC 61000-4-18:2006 Differential mode: 1kV peak voltage; Common mode 2,5kV peak voltage Shut-down ramp: 60s Gradual Startup Power off: 5m Start-up ramp: 60s Radiated emission Limits:...
  • Page 40 GPS Grandmaster Clock IEC 61010-1 Safety -40°C, 16 hours (Cold) IEC 60068-2-1 +85°C, 16 hours (Dry heat) IEC 60068-2-2 95% no condensation, 55°C (Damp heat) IEC 60068-2-30 -40°C to 85ºC / 9 hours / 2 cycles (Change of temperature) IEC 60068-2-14 Class 2 (Vibration) IEC 60255-21-1 Class 1 (Shock)

  • Page 41: Communication

    RT434 3. COMMUNICATION Communicatiom RT434 has 2 Ethernet 10/100BaseT communication interfaces with RJ45 connector E 1 and E THERNET THERNET enabling redundancy. figure 22 shows one of the electrical communication interfaces. Connect a CAT5 cable with a RJ45 connector in each port. The L led indicates that the cable is transmitting signal, and the A led blinks when there is data exchange.

  • Page 42: Factory Default Settings

    GPS Grandmaster Clock Factory default settings Factory defaults for Ethernet ports are listed below: TABLE 3.1: Ethernet 1 port are listed below. IP Address 192.168.0.199 Netmask 255.255.255.0 Broadcast 192.168.0.255 TABLE 3.2: Ethernet 2 port are listed below IP Address 192.168.1.199 Netmask 255.255.255.0 Broadcast...

  • Page 43: Network Port And Communication Protocols

    RT434 TABLE 3.4: Ethernet 4. port are listed below IP Address 192.168.3.199 Netmask 255.255.255.0 Broadcast 192.168.3.255 Factory’s default port to connect to the Gateway is the E 1. The factory default setting of Gateway and DNS THERNET Server are: TABLE 3.5: Gateway and DNS Server. Gateway (E 192.168.0.254 THERNET...

  • Page 44: Direct Communication

    GPS Grandmaster Clock Direct Communication For direct communication using the electrical E port, connect a 10/100 BaseT cross-over network cable THERNET between the computer and the unit, as shown in figure 23. The network cable should have the following pinout: TABLE 3.7: Cross-over network cable pinout.

  • Page 45: Communication Via Ethernet Network

    RT434 In the direct communication with the unit, it is necessary both the computer and the unit connected on the same local network. To do so, configure the computer network connection according to the unit IP address, and network mask, as the following example. RT434 IP address, broadcast and network mask configuration: TABLE 3.8: RT434 IP address, broadcast, and network mask.

  • Page 46: Equipment Access

    GPS Grandmaster Clock Figure 24: Architecture of communication via Ethernet port In communication via network, it is necessary the unit and the computer to be in the same local subnet. It is recommended the E port of the unit to be configured by a user to be compatible with a local network, i.e, THERNET the IP address, network mask, gateway, DNS and broadcast should be compatible with the network the computer is connected to.

  • Page 47: Configuration

    RT434 4. CONFIGURATION Web Interface RT434 has a Web Interface that allows configuring network parameters, time synchronism, output synchronism and PTP standard, updating firmware, changing key, controlling access and manipulating configurations. To connect to the Web Interface, enter the unit E port IP address into the address field of a web browser.

  • Page 48: Network Parameters

    GPS Grandmaster Clock Network parameters The E section of the Web Interface, shown in figure 25, allows configuring network parameters of E THERNET THERNET ports 1, and 2, gateway and DNS. Figure 25: Section to configure network parameters of the unit Ethernet 1/2/3/4 4.2.1 The E...

  • Page 49: Default Gateway

    RT434 The Network Mask field allows entering the network mask from the network to which the unit will be  connected (only decimal numbers). The Broadcast field allows entering the subnet address to which the unit will be connected (only decimal ...

  • Page 50: Configuration Summary

    GPS Grandmaster Clock Figure 26: Username and password window, and message after transmitting new network parameters to the unit In case the new configuration is not transmitted to the unit, the changes will not be saved and will be discarded once the Web Interface is closed.

  • Page 51: Time Features

    RT434 THERNET MAC Adress 00:00:00:00:00:00 Not configurable IP Adress 0.0.0.0 Only decimal numbers Network Mask 0.0.0.0 Only decimal numbers Broadcast 0.0.0.0 Only decimal numbers THERNET MAC Adress 00:00:00:00:00:00 Not configurable IP Adress 0.0.0.0 Only decimal numbers Network Mask 0.0.0.0 Only decimal numbers Broadcast 0.0.0.0 Only decimal numbers...

  • Page 52: Time Settings

    GPS Grandmaster Clock Figure 27 : Section to configure time parameters Time Settings 4.3.1 The field Timezone allows configuring the time zone of the unit, and converting UTC time to local time.  Half hour time zones are supported. The field DST, when enabled, allows configuring the beginning and the end of Daylight Saving Time. ...

  • Page 53: Configuration Summary

    RT434 In case the new configuration is not transmitted to the unit, the changes will not be saved and will be discarded once the Web Interface is closed. Configuration summary 4.3.3 The table below presents all configurable time parameters and its possible values and variables. TABLE 4.3: Summary of configurable time parameters.

  • Page 54: Outputs

    GPS Grandmaster Clock Figure 29 : Section to configure signals applied to synchronism outputs Outputs 4.4.1 Output, Signal, Polarity: allow individually configuring synchronism signal and its polarity of synchronism  outputs; TTL 1/2: allows configuring the TTL-level electrical outputs 1 and 2. Each output has two terminals, one ...

  • Page 55: Serial Datagram

    RT434 PPS -Output with 1 pulse-per-second; 100PPS-Output with 100 pulses-per-second; PPX - Output with programmable frequency pulses; PPM - Output with 1 pulse-per-minute; item TMARK - Output with programmable time; IRIG-B - Output with IRIG-B004 signal; DCF77 - Output with DCF77 signal. It is also possible to choose normal or inverted polarity for each output individually.

  • Page 56: Customizable Datagrams

    GPS Grandmaster Clock The field Stop bit allows choosing the datagram stop bit, which can be 1 or 2. Customizable datagrams 4.4.3 RT434 allows defining a datagram ``ASCII'' to be sent once per second by the serial port, using the characters described below.

  • Page 57: Sending Configuration

    RT434 0 ... 6 day of the week (0 = sunday) ‘S’ ou ‘_’ DST (‘S’ if DST ‘_’ in oder case) ‘_’ ou ‘#’ status (‘_’ if locked, ‘#’ in oder case) ‘_’ ou ‘*’ status (‘_’ if locked, ‘*’ in oder case) ‘_’...

  • Page 58: Configuration Summary

    GPS Grandmaster Clock outputs synchronism signal change. figure 30 shows the username and password window and the message after transmission. Figure 30: Username and password window, and message after transmitting new time parameters to the unit. In case the new configuration is not transmitted to the unit, the changes will not be saved and will be discarded once the Web Interface is closed.
  • Page 59 RT434 TABLE 4.5: Summary of configurable parameters of synchronism outputs. Outputs signal: OFF, PPS, 100PPS, PPX, PPM, TMARK, IRIG-B e DCF77 Output TTL 1/2 polarity: normal ou inverted signal: OFF, PPS, 100PPS, PPX, PPM, TMARK, IRIG-B e DCF77 Output OPTO 1/2 polarity: normal ou inverted signal: OFF, PPS, 100PPS, PPX, PPM, TMARK, IRIG-B e DCF77 Output OC 1/2...

  • Page 60: Ptp Configuration

    GPS Grandmaster Clock PTP Configuration The PTP section of the Web Interface, shown in figure 31, allows the user to configure synchronism parameters using PTP protocol. This setting is possible only for port ethernet 1. Figure 31: Section to configure PTP parameters Profile 4.5.1 RT434 has a set of features attributed to the application of PTP protocol, which the IEEE1588 standard assigns the...

  • Page 61: Domain Number

    RT434 Two-step operation mode. Mechanism to measure P2P delay. Priority 128 in both Ethernet ports. Operation as master only. Interval between delay, synchronism and announce messages (to calculate BMC) every 1 second. 3 seconds waiting time for receiving Announce messages. Custom Profile: profile with all features freely configurable by a user.

  • Page 62: Delay Mechanism

    GPS Grandmaster Clock One-step: Synchronism information and timestamp information are sent in the same data packet;  Two-step: synchronism information is sent in one data packet, and timestamp information is sent in another  data packet; Delay mechanism 4.5.5 RT434 is capable of measuring the time a synchronism message takes to go through the path between master and slave clocks using End-to-end and Peer-to-peer, according to IEEE1588 standard.

  • Page 63: Sending Configuration

    RT434 The field Delay request interval allows choosing the frequency to send messages with delay measurement. It  is possible to configure the unit to send 16 messages per second until one message every-32-seconds. The field Announce interval allows choosing the frequency to send messages that apply the device to ...

  • Page 64: Configuration Summary

    GPS Grandmaster Clock Configuration summary 4.5.9 The table below presents all configurable PTP synchronism parameters, and its possible values and variables. TABLE 4.5: Summary of configurable PTP synchronism parameters. Profile Power Features defined as non-configurable Default Domain number 0, priority 128, and operation as master Custom All features are configurable Features...

  • Page 65: Configurations Control

    RT434 Configurations control The S section of the Web Interface, shown in figure 33, allows updating the firmware, manipulating ETUP configurations, changing key, and changing configuration username and password. Firmware and key updates will be described in chapter Figure 33 : Section to update firmware, manipulate configurations, change key and change configuration username and password Configuration menagement 4.6.1...

  • Page 66: Password Configuration

    GPS Grandmaster Clock Search: allows searching the configuration file in Windows' directories. Restore: allows transmitting the selected configuration file to the unit. By clicking <R > a window will open ESTORE requiring configuration username and password, according to figure 34. Enter the username and password and click <L >.

  • Page 67: Operation

    RT434 5. OPERATION Local access (IHM) RT434 local interface comprises a LCD display, two indicators and navigation buttons. figure 36 shows the front panel of the unit. Figure 36: RT434 Front view State indicators 5.1.1 The L indicator indicates that unit is synchronized with time reference from at least 4 GPS satellites. This OCKED indicator blinks when the unit is searching for orbit data from GPS satellites, which is a common situation if the unit has been moved over long distances or has been out of operation for a long period of time.

  • Page 68: Remote Access (Interface Web)

    GPS Grandmaster Clock By navigating the display using the buttons (arrows pointing right and left), it is possible to check the configuration of the two E networks of the unit. IP addresses, network mask, broadcast and DNS server are shown for THERNET each network, according to the diagram of figure...

  • Page 69: Monitoring Equipament Status

    RT434 Status: monitoring the status of the unit in real time.  General Information: information of the unit system.  Monitoring equipament status 5.2.1 The section S of Web Interface, shown in figure 38, allows monitoring status information of the unit in real TATUS time.

  • Page 70: General Information

    GPS Grandmaster Clock Time: presents the local time, UTC, off-set and time zone.  Position: latitude, longitude and altitude information.  Channels: monitored satellites information (number, phase noise, azimuth and elevation).  General information 5.2.2 The section G of the Web Interface, shown in figure 39, allows visualizing system information of ENERAL...

  • Page 71: Events Innput

    RT434 MAC Address E 1/4: presents the MAC address of each E t port.  THERNET THERNE Key: presents the unit key according to the enabled features (NTP and/or PTP); besides the key, it is shown  the current features configuration of each E port.
  • Page 72 GPS Grandmaster Clock The unit packs 3600 timestamps each turned hour and discards the old timestamps, i.e., there are 3600 recent timestamps in the log file. RT434-TM-EN-2...

  • Page 73: Maintenance

    RT434 6. MAINTENANCE Synchronism failure ( Locked Signaling) When the unit is operating without synchronism reference in the GPS antenna, the failure is signaled in different ways: Local interface, Web Interface, signaling relay, and data packets from IRIG-B, NTP, PTP e SNMP protocols. When synchronism failure is detected, some providence is recommended: Check for configuration being transmitted to the unit.

  • Page 74: Dry-Contact Relay (Locked)

    GPS Grandmaster Clock Dry-contact relay (L 6.1.3 OCKED RT434 has a dry-contact normally closed for remotely signaling the synchronism state of the unit. As the unit is powered up, the dry-contact L is normally closed. Synchronism information from at least 4 GPS satellites is OCKED required for the dry-contact to open.
  • Page 75 RT434 When the status data is zero, it represents the lack of synchronism reference in the GPS antenna input. When it is 1, it represents the existence of synchronism reference in the GPS antenna input, i.e., it is in L state.
  • Page 76 GPS Grandmaster Clock Figure 41: Section to update firmware, manipulate configurations, change key and change configuration username and password To update the unit firmware, access the S section of the Web Interface by typing the unit IP address in a default ETUP browser and follow the steps below: 1.
  • Page 77 It is possible to update the unit key in order to enable new features, according to the commercial policy. For the unit key information, see chapter 1. Contact Alstom to acquire a new key to enable the desired features. The S section of the Web Interface, shown in...
  • Page 78 Internally it is not required any cleaning. Returning the equipment To request equipment repair service, contact Alstom to check out shipment options and receive a technical assistance reference code. The equipment shall be packed in its original package or a suitable package to protect against impacts and moisture.
  • Page 79 RT434 APPENDIX A -CORTEC Optional Variants Order Number 6 7 8 9 10 11-12 13 14 15 16 Model Type RT434 GPS Grandmaster Clock RT434 Power Supply 1 110-250 Vdc / 100-240 Vac Power Supply 2 110-250 Vdc / 100-240 Vac Not installed Ethernet Interface 1 and 2 RJ45 copper 100BASE-TX for configuration only...
  • Page 80 GPS Grandmaster Clock attenuation antenna cable 100 m (328 ft) TNC Male to BNC Male RGC-08 low attenuation antenna cable Surge Arrester Without surge arrester 10 kA, 50 Ohms, BNC-type connector Surge Arrester for 0- 2000 MHz RT434-TM-EN-2...
  • Page 81 RT434 APPENDIX B -IRIG-B STANDARD SUMMARY IRIG-B004 and IRIG-B124 Content Table A.1: IRIG-B standard summary. reference bit ( ) seconds 1 seconds (0 ... 59 or 60) + 10 ms seconds 2 + 20 ms seconds 4 + 30 ms seconds 8 + 40 ms index bit (0)
  • Page 82 GPS Grandmaster Clock minutes 10 + 150 ms minutes 20 + 160 ms minutes 40 + 170 ms index bit (0) + 180 ms + 190 ms position identifier 2 ( ) hours 1 hours (0 ... 23) + 200 ms hours 2 + 210 ms hours 4...
  • Page 83 RT434 index bit (0) + 340 ms days 10 + 350 ms days 20 + 360 ms days 40 + 370 ms days 80 + 380 ms + 390 ms position identifier 4 ( ) days 100 + 400 ms days 200 + 410 ms index bit (0)
  • Page 84 GPS Grandmaster Clock year 8 + 530 ms index bit (0) + 540 ms year 10 + 550 ms year 20 + 560 ms year 40 + 570 ms year 80 + 580 ms + 590 ms position identifier 6 ( ) index bit (0) + 600 ms index bit (0)
  • Page 85 RT434 Time Quality 0000 (0) : locked + 710 ms Time Quality 1111 (F) : no-time + 720 ms Time Quality 1011 (B) : never locked + 730 ms Time Quality 0100 (4) : free-wheeling + 740 ms Módulo 2 of the sum of the data bits Parity (odd) 0 a 74 (Bits 75-99 not included in the + 750 ms...
  • Page 86 GPS Grandmaster Clock time-of-day 512 + 900 ms time-of-day 1024 + 910 ms time-of-day 2048 + 920 ms time-of-day 4096 + 930 ms time-of-day 8192 + 940 ms time-of-day 16384 + 950 ms time-of-day 32768 + 960 ms time-of-day 65536 + 970 ms index bit (0) + 980 ms...
  • Page 87 RT434 APPENDIX C - PTP STANDARD CONCEPTS (IEEE1588) Descrption The Precision Time Protocol (PTP) is an ultimate time synchronism accuracy protocol for Ethernet networks. On a local area network, it achieves clock accuracy in the sub-microsecond range, making it suitable for applications where synchronism is essential to the measurement system.
  • Page 88 GPS Grandmaster Clock A universally unique numeric identifier for the clock. This is typically constructed based on a device's MAC address. Time information quality is based on the time system adopted as reference. Priority assigned to a clock in its configuration. Clock variance, which represents its stability based on observation of its performance over time.
  • Page 89 RT434 Hierarquical Topology IEEE1588 defines a hierarquical topology composed of different types of clocks that send and receive synchronization messages. In hierarquical topology, a boundary clock is elected the grandmaster clock that sends PTP messages for the entire network, which are also connected ordinary and boundary clocks. The boundary clocks connected to the network are used as intermediate synchronism source for ordinary clock.
  • Page 90 GPS Grandmaster Clock Each broadcast begins at time T1 which a Sync multcast message sent by the master to all the clocks in the domain. A clock receiving this message takes not of the local time T1' when this message is received. The master may subsequently send a multicast Follow Up with accurate timestamp.
  • Page 91 RT434 To use the layer 2 it is necessary that the network has E connections between all master and slave clocks, THERNET which are not common when the network is divided into subnets and there is not an interconnection between them. The advantage of using layer 2 is that the traffic through the network is smaller because the sent packets do not require including IP and UDP address.
  • Page 92 GPS Grandmaster Clock The advantage of P2P is that the accuracy of synchronism is immune to change in the network topology, since the delay between each master-slave connection is calculated for each packet sent. However, the P2P solution is possible only when all devices in the network are transparent, i.e., they can perform delay measurement between one point and another.
  • Page 93 RT434 The clock connected to the network selected as master by the BMC algorithm, should send Sync messages with synchronism information, and in case it is a two-step clock, it should also send a Follow Up message, containing a timestamp. The sending interval of the messages is configurable and its standard value, specified by IEEE1588 standard, is one-message-per-second.
  • Page 94 GPS Grandmaster Clock APPENDIX D – SERIAL DATAGRAMS RT434 can be configured to send datagrams through serial ports. The datagrams defined for the unit are ACEB, NEMEA GPZDA, and Meinberg. ACEB Datagrams ACEB datagram comprises 13 bytes, sent once per minute in second 02. The datagram information is described below.
  • Page 95 RT434 NEMEA GPZDA Datagram NEMEA ACEB datagram comprises 32 characters, sent once per second. The datagram information is described below: $GPZDA,hhmmss.0,DD,MM,YYYY,,*CC CR TABLE C.2: GPZDA Datagram Time Information Paramter Possible values Description 00 ... 23 hours 00 ... 59 minutes 00 ...
  • Page 96 GPS Grandmaster Clock TABLE C.4: GPZDA Datagram Checksum Information. Paramter Description Comments checksum two hexadecimal digits representing the result of exclusive OR of all characters between ‘$’ and ‘*’ (‘$’ and ‘*’ are excluded) Meinberg datagram Meinberg datagram comprises 32 characters, sent once per second. The datagram information is described below: STX D:DD.MM.YY;T:w;U:hh.mm.ss;uv__ ETX TABLE C.5: Meinberg Datagram Time Information.
  • Page 97 RT434 Table C.6: Meinberg Datagram Beginning and End Information Caractere ASCII ASCII Description start-of-datagram end-of-datagram space Table C.7: Meinberg Datagram Unit's Synchronism Information Paramter Description Commets status ‘_’ se “locked”, ‘#’ if not status ‘_’ se “locked”, ‘*’ if not RT434-TM-EN-...
  • Page 98 GPS Signal Attenuation GPS signal attenuation is related to cable type and overall cable length. When using the active antenna supplied by Alstom, total attenuation should not exceed 32 dB. Total attenuation can be computed by using: Where is the attenuation per unit length for the given cable and is the overall cable length.
  • Page 99 RT434 m (328 ft) — 17 dB m (410 ft) — 21 dB m (492 ft) — 25 dB Propagation Delay The antenna cable delays GPS signal. In applications in which the ultimate time accuracy is desired, this delay should be compensated inside the unit. Typically, the delay introduced by coaxial cables is in the magnitude of 4 ns/m (1.2 ns/ft) of cable length.
  • Page 100 GPS Grandmaster Clock The table below summarizes some typical delays caused by coaxial cables Tabela D.2: Atenuação de cabos de antena. Cable length Tipical delay m (50 ft) 60 ns m (82 ft) 100 ns m (164 ft) 200 ns m (246 ft) 300 ns m (328 ft)
  • Page 101 RT434 APPENDIX F –APPLICATION EXAMPLES Application Example 1 - Synchronism Outputs In Application Example 1, shown in figure 45, IRIG-B outputs, synchronization via Ethernet with NTP protocol and serial datagrams to synchronize relays and a disturbance recorder are used. Also a transceiver optical-electrical (RT412 - Optical Transceiver) to transform an electrical output in optics to synchronize a relay and a distributor of signals (RT411 - Timing Distributor) that, from an output of the RT434, synchronizes three relays.
  • Page 102 GPS Grandmaster Clock Application Example 2 - Signal Distribution In Application Example 2, shown in figure 46 are employed IRIG-B outputs to synchronize some IEDs, a disturbance recorder and a signals distributor (RT411 - Timing Distributor) that from an output of the RT434, synchronizes other four equipment.
  • Page 103 RT434 Application Example 3 - Connecting the Serial Port The Application Example 3, shown in figures 47 and 48, illustrates the serial port connections RS232 and RS485 levels, used to synchronize a PLC and two relays, respectively. Figure 47: Application Example 3 - Connecting the Serial Port at Level RS232 Figure 48: Application Example 3 - Connecting the Serial Port at Level RS485 RT434-TM-EN-...
  • Page 104 GPS Grandmaster Clock RT434-TM-EN-2...
  • Page 105 RT434 Alstom Grid © ALSTOM 2014. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances.

Table of Contents