ELECTRONICINTERLOCKINGSYSTEM

Create for the Future
Safety and Stability in Railway Transportation

K5D

https://www.kyosan.co.jp© 2020 Kyosan Electric Manufacturing Co., Ltd.

20200401

ELECTRONIC INTERLOCKING (EI) SYSTEM “K5D”
30 years’ history with over 2,000 stations
Thirty years have past since the electronic interlocking system was first developed and put
to practical use, followed by various enhancements made to the system. The criticaltechnologies incorporated in the electronic interlocking system include electronic circuits,
programs, interlocking technology, a transmission circuit, and field equipment interfaces.
The remarkable advances made in LSI (RISC) technology with regard to electronic circuits,along with much higher transmission speeds in recent years have helped make many
variations and/or various system configurations of electronic interlocking systems possible.
Along with the advancement of basic technology, electronic interlocking systems arerequired to evolve, in addition to the role of ensuring operation even in areas with a highvolume of train traffic and high-quality safety performance. Kyosan developed a newelectronic interlocking system which is named “K5D” so as to meet these demands andparticipate actively in future generation.

Features of “K5D”
The interlocking system is a plant that governs safe, smooth operation of trains in a station or depot
area controlling all varieties of signaling equipment installed in the area, such as point machines,
track circuits, signals, etc., by electrical/electronic means.
The next generation electronic interlocking system is designed based on the following key features.

1. High-Quality Safety & Redundancy
The logic unit of the next generation electronic interlocking system secures the high safety bycomparing calculation results of two 32-bit CPUs in the logic card. In addition, the logic unit and its
peripherals are all duplicated for redundancy in order to maintain high system availability. The newsystem conform to requirements for Safety Integrity Level 4 of international standards IEC 62278.

2. Visualized Designing
A specially provided software tool (Logic Data Compiler: LDC) facilitates the design of theinterlocking logic, which can be programmable as an image of relay circuit diagrams.

3. Enhanced Scalability

Basic information of “K5D”
External view

Electronic terminal sub-rackInterface

ET-NET, RelayInput/Output

32 I/Os per 1 PIO borad

Temperature [°C]

-20 〜 +70

Humidity [%]95 and less (no condensation)

Operating voltage

DC24V±10%

Modular versatile remote electronic terminals allow easy expansion of the system.

4. Variety in Monitoring
The system console enables comprehensive maintenance of the interlocking system through avariety of graphical monitoring functions.

5. Compliance with EMC standards
Our interlocking system has been designed and manufactured based on a wealth of experience indelivering products to overseas markets, and has passed the EMC test items to comply with theIEC61000 and EN50141 series.

6. User-Friendly Maintainability
Logic sub-rackInterface

ET-NET, Ethernet

CPU

32bit Fail-safe CPU

Temperature [°C]

-20 〜 +70

Humidity [%]95 and less (no condensation)

Operating voltage

DC24V±10%

Wire harness is available for internal wiring and it reduces maintenance and replacement works.
Maintenance console has function to monitor other station’s status through the network. The
centralized supervision enables quick response in case of emergency.
MaintenanceconsoleLogic sub-rack

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Maintenanceconsole2System configuration diagram (for single station)

Descriptions of the System configuration diagrams of “K5D”

Operation room
Control panel

Either Control hardware is available Control Panel type or Control PC type for “K5D”.

Control PC”K5D” is connectable with Centralized traffic control system (CTC), Automatic trainsupervision system (ATS) and other signaling system via Ethernet.
ET-NET between Logic sub-rack and Electronic terminal sub-rack is exclusive line fortransmitting/receiving each equipment’s information of the station.

Signals

MaintenanceconsoleThe Logic sub-rack is able to control multi stations, and realize the configuration similar tosingle station’s one.

Logic sub-rack

Point machine(ET-NET)

Relay terminal
orDirect drive

The Electronic terminal sub-rack connects with signaling field gears (e.g. Signals, Pointmachines, Track circuits, Level crossings, etc.) directly by using dedicated drive cards or via
relay terminals.

Designing of “K5D”

Electronic terminal
sub-rack

Axle Counter
Evaluator

Signaling equipment room

Track circuit, etc.

A. Flexibility attained by using IC card
The software of the next generation electronicSystem configuration diagram (Centralized)

interlocking system consists of two layers. One is thebasic software (firmware) that manages the safe

Station 1

operation of the system stored in a ROM. The other isapplication software that executes station- specificinterlocking logic that is programmed using the LDC
and loaded by means of an IC card. New installation or
modification of the interlocking logic is easily
CPU unit & IC card

accomplished by exchanging the IC card.

B. LDC (Logic Data Compiler)
The LDC is a software design tool that allows theRelay terminal
or
Direct drive

designer to create the interlocking logic on a Boolean

Relay terminal
orDirect drive

logic basis, which is easily interchangeable with relay

Relay librarycircuit diagrams as to logic expression. In addition, theLDC is outfitted with an automatic data comparison
feature that identifies modified portions of the logic on
SignalPointmachine
Station 2

3

TrackcircuitAxle Counter Point
Signal
Evaluator machine

Trackcircuit

Levelcrossinggate

the display for easy verification of the modified design.

LDC diagram

Station X

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Track record of Kyosan’s interlocking system

System monitor of “K5D”

Implemented at over 2,000 stations worldwide!

Maintenance ConsoleSince 1984

The system console has a variety of different real-time displays, including track map, relay status,timing charts of relay operation, relay circuit diagram, and system status. In addition, operation andfailure events are automatically recorded in the system’s memory for a predetermined period oftime, and can be reported via the display or a printer, providing an easy means for data analysis andKorea

troubleshooting.
Field equipment

United States

Japan

P.R. China

UAE

TaiwanSaudi Arabia

India
Bangladesh
Singapore

BrazilIndonesia
Operations of each element of thesystem, including logical relays andfield equipment, are recorded inchronological order.
System Console

Major Supply list
Tokyo Metropolitan Bureau of Transportation

Screen display

PublicRailways

The system console displays various system statuses via comprehensive graphical images.
Track map

Relay status

Greater Orlando Aviation Authority

Transportation Bureau, City of Nagoya

USA

Kobe City Transortation Bureau
Transportation Bureau City of Sendai

India

West Japan Railway Company
JRCentral Japan Railway Company

Displays track status over theentire depot area.

Timing chart

Shows concurrent operation
status of the logical relays.

POSCO Engineering & Construction Co., Ltd.
Korea

Busan Transportation Corporation
Incheon International Airport corporationTOKYU CORPORATION

China State Railway Group Co., Ltd.

Keio Corporation

Overseas

P. R. China

SAGAMI RAILWAY Co., Ltd.
PrivateRailways

Osaka Metro Co.,Ltd.
Kintetsu Railway Co.,Ltd.
Keihan Electric Railway Co.,Ltd.
Metropolitan Intercity Railway Company

Describes programmed
interlocking logic in relay
circuit diagrams.

Failed portions are highlighted
in red. When the red part ispressed, a message will appear
with the solution.

Singapore
UAE

SEMBOKU RAPID RAILWAY CO.,LTD.

TaiwanLand Transport Authority
Changi Airport Group
Dubai Civil Aviation Authority"Taoyuan International Airport Office
Civil Aeronautics Administration, MOTC R.O.C"
Taiwan High Speed Rail Corporation

Saudi Arabia Saudi AramcoIndonesia

Directorate General of Railways

Bangladesh

Bangladesh RailwayBrazil

5Harbin Metro Group Co., Ltd.

Taiwan Railways Administration

Ibara Railway Company
Keisei Electric Railway Co., Ltd.

Airport Authority Hong Kong
Macao Light Rapid Transit Corporation, Limited

HANSHIN ELECTRIC RAILWAY CO.,LTD.

Indicates operating sequenceof the logical relays in a timing
chart image.

Gwangju Metropolitan Rapid Transit Corporation

Tokyo Metro Co., LtdNagoya Railroad Co.,Ltd.

Relay circuit diagram

HYDERABAD METRO RAIL LIMITEDJapan Freight Railway CompanyOdakyu Electric Railway Co., Ltd.

Indicates healthy status of eachblock configuring the system.

Indian Railways
Korea Railroad corp

Hokkaido Railway Company
Kyushu Railway Company

Japan

Hartsfield-Jackson Atlanta International Airport
Miami-Dade Aviation Department

East Japan Railway Company

System status

Hillsborough County Aviation Authority

Brazil CSP Steel Plant Complex

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