Alstom Reason RT431 User manual

Reason RT431
© ALSTOM 2015. 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.
Technical Manual
Time Code Generator
Platform Hardware Version: A
Platform Software Version: 06
Publication Reference: RT431-TM-EN-6v1

Contents_Toc428459090
Table of Figures 6
List of Tables 8
Introduction 10
1Chapter Overview 11
2Foreword 12
Target Audience 122.1
Accronyms and abbreviations 122.2
3Product Scope 15
4Key Features 16
PTP / SNTP / NTP 164.1
Stationary Mode 17
4.2
Improved Stability 174.3
Environmental Robustness 174.4
5Functional Overview 18
6Standards Compliance 19
EMC Compliance 196.1
Product Safety 196.2
Protective Class 196.3
Installation category 196.4
Environment 196.5
R&TTE Compliance 196.6
Safety Information 20
1Chapter Overview 22
2Health and Safety 23
3Symbols 24
4Installation, Commissioning and Servicing 25
Lifting Hazards 254.1
Electrical Hazards 254.2
Fusing Requirements 274.3
Equipment Connections 274.4
Pre-energisation Checklist 284.5
Peripheral Circuitry 294.6
Upgrading/Servicing 294.7
5Lithium Battery 30
6Decommissioning and Disposal 31
Hardware Design 32
1Chapter Overview 33
2Equipment View 34
3Network Port 35
4Power Supply 36
Installation 38

1Chapter Overview 39
2Unpacking 40
Normal Use of the Equipment 402.1
External Indications 402.2
3Mounting 41
Power Supply 413.1
GPS Antenna Terminal 433.2
TTL Electrical Outputs 453.3
Open-collector electrical output 463.4
Serial port (RS232) 473.5
4Ethernet Communication 49
Communication properties 494.1
Factory default settings 494.2
Network port and communication protocols 504.3
Direct Communication 504.4
Communication via Ethernet network 524.5
Equipment access 534.6
5Powering Up 54
Operation 55
1Chapter Overview 56
2State Indicators 57
3Web Interface (Remote Access) 58
4Monitoring Menus –Web Interface 59
Status 604.1
General Information 61
4.2
Configuration 62
1Chapter Overview 64
2Web Interface 65
3Ethernet 66
Ethernet Ports 663.1
Default Gateway 663.2
DNS Server 673.3
Sending configuration 673.4
Configuration Summary 673.5
4Time Settings 68
Time Parameters 68
4.1
Sending configuration 694.2
Configuration summary 694.3
5Time Signals 70
Outputs 715.1
Serial datagram 725.2
Customizable datagrams 725.3
Sending configuration 745.4
Configuration Summary 745.5
6PTP Configuration 76

Profile 766.1
Domain number 776.2
Network protocol 776.3
Operation mode 776.4
Delay mechanism 776.5
Master and slave clocks 776.6
PTP Messages 786.7
Sending configuration 786.8
Configuration summary 786.9
7Setup 80
Configuration management 817.1
Password configuration 817.2
Reset GPS Almanac 827.3
Stationary Mode 827.4
Demo mode 82
7.5
Log Files 827.6
Reboot System 827.7
Maintenance 83
1Chapter Overview 84
2Time Synchronization Failure (Locked Signaling) 85
Locked indicator (HMI) 852.1
Remote monitoring (Web Interface) 852.2
IRIG-B Signal 852.3
PTP Protocol 852.4
NTP Protocol 862.5
SNTP Protocol 86
2.6
3Firmware Update 87
4Equipment Key Change 88
5Cleaning Instructions 89
6Equipment Return 90
Instructions for Equipment Repair/Service 906.1
Technical Specification 91
1Chapter Overview 93
2Power Supply 94
3GPS Antenna 94
GPS Antenna Receiver 943.1
GPS Antenna TYPE 953.2
Antenna Cable 953.3
Surge Arrester 963.4
4Internal Oscillator 97
5Outputs 97
Connectors 975.1
TTL Level Electrical Outputs 985.2
Open Collector Electrical Outputs 995.3
Serial Port (RS232) 995.4
6Precision Time Protocol PTP (IEEE 1588) 99

7Ethernet Port 100
8Environment 100
9Type Test 101
10 Dimensions, Weight 103
Ordering Options 105
1Chapter overview 106
1RT431 Cortec 107
Appendixes 108
Appendix A –IRIG-B Standard Summary 109
Appendix B –PTP Standard Concepts (IEEE1588) 114
Appendix C –Serial Datagrams 120
Appendix D –GPS Antenna Delay Compensation 124
Appendix E –Application Examples 126

TABLE OF FIGURES
Figure 1: Functional Overview of RT431 18
Figure 2: Front view of RT431 34
Figure 3: View of the RT431 connectors 34
Figure 4: Serial Number, Part Number and Equipment Specifications location40
Figure 5: Pre-insulated tubular pin terminals 41
Figure 6: Supply connector assembly 41
Figure 7: AC power connection 42
Figure 8: DC power connection 42
Figure 9: RT431 Grounding Strap 43
Figure 10: GPS antenna connector 43
Figure 11: Recommended position for installing the GPS Antenna 44
Figure 12: Recommended position for the installation of the GPS Antenna
conduit 45
Figure 13: TTL level electrical outputs 46
Figure 14: Open collector electrical outputs 46
Figure 15: Connection diagram of the open-collector electrical outputs 47
Figure 16: Serial port RS232 and RS422/485 47
Figure 17: Electrical communication interface via Ethernet network 49
Figure 18: Direct communication architecture using the Ethernet electrical port
51
Figure 19: Architecture of communication via Ethernet port 52
Figure 20: RT431 Web Interface 58
Figure 21: Section to monitor the status of the unit in the Web Interface 60
Figure 22: Section to visualize general information of the system 61
Figure 24: Section to configure network parameters of the unit 66
Figure 26: Section to configure time parameters 68
Figure 27: Section to configure time signals applied in the outputs 70
Figure 28: Section to configure PTP parameters 76
Figure 29: Section to update firmware, manipulate configurations, change key
and change configuration username and password 80
Figure 30: Username and password request. 81

Figure 31: Section to update firmware, manipulate configurations, change key
and change configuration username and password 87
Figure 32: Section to update firmware, manipulate configurations, change key
and change configuration username and password. 88
Figure 33: Connectors of RT431 97
Figure 35: RT431 Dimensions 104
Figure 36: Application Example 1 –Time Synchronization Outputs 126
Figure 37: Application Example 2 - Signal Distribution 127
Figure 38: Application Example 3 - Connecting the Serial Port at Level RS232
128
Figure 39: Application Example 3 - Connecting the Serial Port at Level RS485
128

List of Tables
Table 1: Ethernet port 49
Table 2: Gateway and DNS Server 50
Table 3: Communication port and protococols 50
Table 4: Cross-over network cable pinout 50
Table 5: RT431 IP address and network mask 51
Table 6: Computer IP address and network mask 51
Table 7: Factory default username and password to configure 65
Table 8: Summary of configurable network parameters 67
Table 9: Summary of configurable time parameters 69
Table 10: Customizable datagram special characters 72
Table 11: Summary of all configurable parameters for outputs 74
Table 12: Summary of configurable PTP parameters 79
Table 13: Power supply specifications 94
Table 14: GPS Antenna input specifications for temporal synchronization 94
Table 15: GPS Antenna specifications 95
Table 16: Antenna Cable specifications 95
Table 17: Surge arrester specifications 96
Table 18: Internal oscillator specifications 97
Table 19: RT431 connectors 98
Table 20: Electrical outputs specifications 98
Table 21: Open callector outputs specifications 99
Table 24: RS232 serial port specifications 99
Table 27: PTP time synchhronization protocol specifications 99
Table 28: Ethernet port specification 100
Table 29: Environment specification 100
Table 30: Enclosure Protection IEC 60529 101
Table 31: EMC tests were performed according to IEC 60255-26 referring to the
following standards 101
Table 32: Safety tests 103
Table 33: Environmental tests 103
Table 34: Dimensions and weight specification for RT431 103
Table 35: IRIG-B standard summary 109

Table 36: ACEB Datagram Information 120
Table 37: GPZDA Datagram Time Information 121
Table 38: GPZDA Datagram Line Feed and Carriage Return Information 121
Table 39: GPZDA Datagram Checksum Information 122
Table 40: Meinberg Datagram Time Information 122
Table 41: Meinberg Datagram Beginning and End Information 123
Table 42: Meinberg Datagram Locked State Information 123
Table 43: Antenna cables attenuation 124
Table 44: Attenuation of antenna cables 125

INTRODUCTION
CHAPTER 1

Chapter 1 –Introduction
RT431
RT431
11
1 CHAPTER OVERVIEW
This chapter provides some general information about the technical manual and an introduction to the
device(s) described in this technical manual.
THIS CHAPTER CONTAINS THE FOLLOWING SECTIONS:
Foreword 12
Product Scope 15
Key Features 16
Functional Overview 18
Standards Compliance 19

RT431
Chapter 1 –Introduction
12
RT431
2 FOREWORD
This technical manual provides a functional and technical description of Alstom Grid's RT43x GPS
Grandmaster Clocks, as well as a comprehensive set of instructions for using the devices. The level at which
this manual is written assumes that you are already familiar with protection engineering and have experience
in this discipline. The description of principles and theory is limited to that which is necessary to understand
the product. For further details on general protection engineering theory, we refer you to Alstom's publication
NPAG, which is available online or from our contact centre.
We have attempted to make this manual as accurate, comprehensive and user-friendly as possible. However
we cannot guarantee that it is free from errors. Nor can we state that it cannot be improved. We would
therefore be very pleased to hear from you if you discover any errors, or have any suggestions for
improvement. Our policy is to provide the information necessary to help you safely specify, engineer, install,
commission, maintain, and eventually dispose of this product. We consider that this manual provides the
necessary information, but if you consider that more details are needed, please contact us.
All feedback should be sent to our contact centre via the following URL:
http://www.alstom.com/grid/contactcentre/
TARGET AUDIENCE2.1
This manual is aimed towards all professionals charged with installing, commissioning, maintaining,
troubleshooting, or operating any of the products within the specified product range. This includes installation
and commissioning personnel as well as engineers who will be responsible for operating the product.
The level at which this manual is written assumes that installation and commissioning engineers have
knowledge of handling electronic equipment. Also, system and protection engineers have a thorough
knowledge of protection systems and associated equipment.
If reference is made to the IED's internal settings and signals database, the setting cells and DDB
signals are written in bold italics
For example: The Language cell in the SYSTEM DATA column
If reference is made to the IED's internal settings and signals database, the value of a cell's content
is written in the Courier font
For example: The Language cell in the SYSTEM DATA column contains the value English
ACCRONYMS AND ABBREVIATIONS2.2
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;

Chapter 1 –Introduction
RT431
RT431
13
bps - Bits per second;
CAT5 - Network Cable;
CF - Federal Constitution;
PLC - Programmable Logic Controller;
CMOS - Complementary Metal-Oxide-Semiconductor;
DB9 - Connector do type D-subminiature;
DC - Direct Current;
DCF77 - Time synchronization protocol Deutschland LORAN-C (Long Range Navigation - C) Frankfurt 77
(77.5 kHz);
DMARK –Single pulse with a programable date and time;
DNS - Domain Name System;
DST - Daylight Saving Time;
DTE - Data Terminal Equipment;
E2E - End-to-end;
ETH - Abbreviation of the term Ethernet;
FW - Abbreviation of the term Firmware;
GND - Abbreviation of the term Ground;
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;
HMI - Human-Machine Interface;
IP - Internet Protocol;
IP40 - Degree of protection 40;
IRIG-B - Time synchronization protocol Inter Range Instrumentation Group (Rate Designation B);
LCD - Liquid Crystal Display;
MAC - Media Access Control;
MIB - Management Information Base;
NTP - Network Time Protocol;

RT431
Chapter 1 –Introduction
14
RT431
OUT - Abbreviation of the term Output;
P2P - Peer-to-peer;
PLC - Programmable Logic Controller;
PPM - Pulse per minute;
PRP - Parallel Redundancy Protocol;
PPS - Pulse per Segundo;
PPX - Pulse per X s;
PTP - Precision Time Protocol;
RAIM - Receiver Autonomous Integrity Monitoring;
RFC - Data formatting specification RFC 1951, DEFLATE; RJ45 - Ethernet Connector with 8 conductors;
RS232/485 - Serial port levels;
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;
TTL - Transistor-to-Transistor logic;
TX - Data transmission;
UDP - User Datagram Protocol;
UTC - Universal Time Coordinate.

Chapter 1 –Introduction
RT431
RT431
15
3 PRODUCT SCOPE
RT431 Time Code Generator is a compact GPS-based clock designed to be installed on a DIN rail, allowing
the equipment to be installed in locations with limited space and reduced panels.
Precise Time Protocol (IEE 1588 PTP) version 2 provides accurate synchronization over Ethernet networks
within 100 ns accuracy, enabling applications like synchrophasors without the need to use separate IRIG-B
and PPS networks. Improved stability and holdover performance are achieved with advanced stability
control, which enables the continuous synchronization of IEDs with high accuracy even with occasional loss
of satellites. For power system applications, the PTP Power Profile is available in accordance with the
standard IEEE C37.238.
RT431 configured as PTP slave also works as a transceiver from PTP to IRIG-B, serial or pulse time codes,
enabling the use of PTP on IEDs that do not support this protocol.RT431 - Time Code Generator, is a
compact GPS-based clock capable of being time source, in different formats and protocols, to synchronize
internal clocks of equipment and systems based in digital processing.
It supports the following protocols sync time:
PTP (Precision Time Protocol) according to IEEE1588 standard, eliminating delay from message
processing which pass in other devices in the network;
NTP/SNTP;
IRIG-B004 (Demodulated);
IRIG-B124 (Modulated);
DCF77;
Serial Datagrams through the RS232 and RS422/485 serial ports.
Low frequency pulses, as PPS, PPM and others configurable options.

RT431
Chapter 1 –Introduction
16
RT431
4 KEY FEATURES
Better than 100ns time accuracy;
Temporal synchronization reference through GPS antenna and PTP server input;
PTP temporal synchronization protocol according to IEEE1588-2008 standard;
PTP profile option, according to IEEE C37.238 standard;
NTP/SNTP server using Ethernet port;
DIN rail assembly;
High accuracy internal oscillator system;
Status monitoring using SNMP;
Stationary Mode to keep a locked synchronization even with only one GPS satellite;
Delay compensation for GPS antenna cables;
Time signals in IRIG-B004 or DCF77 format;
Pulses: 100 pulses-per-second, 1 pulse-per-second, 1 pulse-per-minute;
Freely configurable low frequency pulse generator;
Pulse on-time with daily repetition;
User-configurable rules for daylight-saving-time and configurable time zone;
Configurable over Ethernet using Web Interface;
RS232 serial port with frequency variable pulse and datagram;
Ethernet network port 10/100Base-T for configuration and access to the equipment;
Indicators for monitoring synchronization from GPS antenna and equipment status;
AC or DC power sources possibility.
PTP / SNTP / NTP4.1
Reason RT431 offers the accurate PTP time protocol, which is defined by the IEEE 1588, to precisely
synchronize IED’s and computers over a LAN (or VLAN). This temporal protocol is capable of syncronizing
multiple clocks with a better than 100ns time accuracy on a Ethernet Network.
As designed by the IEEE 1588, RT431 may operate either as the “PTP Grandmaster” clock or the “Slave”
clock. In accordance to IEEE C37.238 standard, the Reason GPS clocks are also compatible with PTP
Power Profile for application in digital substations.
To save time and reduce costs avoiding the need to overlay a separate time-synchronising network,
SNTP/NTP and PTP can share can share the same physical links as IEC 61850, DNP3 over Ethernet,
MODBUS, etc.

Chapter 1 –Introduction
RT431
RT431
17
STATIONARYMODE4.2
In applications such as current differential protection, the equipment providing the time synchronization must
be in locked state in order to keep the protection available. For this reason, the Stationary Mode allows the
equipment to be in a locked state even when receiving signals from a single GPS satellite.
However, these two conditions shall be followed to use the Stationary Mode:
Stationary Mode can be used only when RT431 is in a fixed position (in a substation, for example). If
the unit is moved from its position when operation in Stationary Mode, there will be loss of time
accuracy.
Before get in Stationary Mode, RT431 shall lock its sync receiving information from at least four
sattelites. This condition applies every time the unit is powered on.
IMPROVED STABILITY4.3
All GPS clocks from Reason count with improved holdover stability and advanced control-loop algorithms to
allow for hours of accurate free-running if satellite communication is lost.
ENVIRONMENTAL ROBUSTNESS4.4
With a robust design, all Reason GPS are in accordance with IEC 61010-1 and IEC 60255-27 standards,
ensuring reliability and ruggedness even under harsh environments. Critical applications can benefit from the
optional redundant power supply for even higher uptime and reliability. Every manufactured unit undergoes
complete functional and stress tests to ensure the highest quality

RT431
Chapter 1 –Introduction
18
RT431
5 FUNCTIONAL OVERVIEW
Figure 1: Functional Overview of RT431

Chapter 1 –Introduction
RT431
RT431
19
6 STANDARDS COMPLIANCE
The device has undergone a range of extensive testing and certification processes to ensure and prove
compatibility with all target markets. A detailed description of these criteria can be found in the Technical
Specifications chapter.
Compliance with the European Commission Directive on EMC and LVD is demonstrated using a Technical
File.
EMC COMPLIANCE6.1
Compliance with IEC 60255-26:2013 was used to establish conformity.
PRODUCT SAFETY6.2
Compliance with IEC 61010-1:2010 was used to establish conformity.
PROTECTIVE CLASS6.3
Protective Class I. This equipment requires a protective conductor (ground) to ensure user safety.
INSTALLATION CATEGORY
6.4
Compliance with IEC 61010-1:2010 Overvoltage Category II
ENVIRONMENT6.5
IEC 60068-2-1, IEC 60068-2-2, IEC 60068-2-30, IEC 60068-2-14, IEC 60255-21-1, IEC 60255-21-2. The
equipment is intended for indoor use only. If it is required for use in an outdoor environment, it must be
mounted in a specific cabinet or housing which will enable it to meet the requirements of IEC 60529 with the
classification of degree of protection IP54.
R&TTE COMPLIANCE6.6
Radio and Telecommunications Terminal Equipment (R&TTE) directive 99/5/EC.
Conformity is demonstrated by compliance to both the EMC directive and the Low Voltage directive, to zero
volts.

SAFETY INFORMATION
CHAPTER 2