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PointMachine: Apointmachine(alsoknownasapointmotor,switchmotororswitchmachine)is

adeviceforoperatingrailwayturnoutsespeciallyatadistance.

TrackCircuit: Atrackcircuitisasimpleelectricaldeviceusedtodetecttheabsenceofatrainonrail

tracks,usedtoinformsignallersandcontrolrelevantsignals.

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Balise: Baliseisanelectronicbeaconortransponderplacedbetweentherailsofarailwayaspart

ofanAutomaticTrainProtection(ATP)system.TheFrenchword"balise"isusedtodistinguishthese

beaconsfromotherkindsofbeacon.

AbalisewhichcomplieswiththeEuropeanTrainControlSystemspecificationiscalledaEurobalise

Signal: Asignalisamechanicalorelectricaldeviceerectedbesidearailwaylinetopassinformation

relating to the state of the line ahead to train/engine drivers. The driver interprets the signal's

indicationandactsaccordingly.Typically,asignalmightinformthedriverofthespeedatwhichthe

trainmaysafelyproceedoritmayinstructthedrivertostop.

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Radio: Thisradiosystemprovidessecurecontinuouscommunicationbetweentrainsandtrackside.

Itoperates in theunlicensed2.4GHzband and is specificallydesigned andproven in the railway

environment.

Coaxial cable : is an electrical cablewith an inner conductor surroundedby a flexible, tubular

insulatinglayer,surroundedbyatubularconductingshield.Thetermcoaxialcomesfromtheinner

conductorandtheoutershieldsharingthesamegeometricaxis.

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PCB: A printed circuit board, or PCB, is used to mechanically support and electrically connect

electronic components using conductive pathways, tracks or signal traces etched from copper

sheets laminatedonto a nonconductive substrate. It is also referred to as printedwiringboard

(PWB) or etchedwiring board.A PCB populatedwith electronic components is a printed circuit

assembly (PCA),alsoknownasaprintedcircuitboardassembly (PCBA).Printedcircuitboardsare

usedinvirtuallyallbutthesimplestcommerciallyproducedelectronicdevices.

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WESTRACE(ELECTRONICINTERLOCKING)CARDS:

PowerSupplyModule

CentralProcessingmodule

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VitalParallelInputModule

VitalRelay

output

Module

VitalLampoutputModule

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