Sharp SD-AT1000W Dokumentacja Pobierz pdf (Strona 168)

Section-4 Theory

October 17, 2013

4‐4

WARNING:Disconnectprimarypower priortoservicing. 888‐2693‐004

4.2.3 TransmitterControlUnit(TCU)

Figure 4-3 TCU Block Diagram

TheTC

U(TransmitterControlUnit)ispresentindualdriveUAXtransmittersystems.TheTCUcontrolsLPUswitching

andalsoservesasacentralcustomerinterfaceviaitsgraphicaluserinterface(GUI)touchscreen.

TheTC

UGUIistheprimarylocalinterfacefortheoperatorbutisnotrequiredtooperatethetransmitter.TheTCU

assignsanLPUastheprimary(ormaster),andthesecondLPUbecomestheslave.Basicoperatorcontrols,suchas

on,off,raise,andlower,arelocatedontheTCUfr

ontpanelnexttotheGUI.OperationandnavigationoftheGUIis

discussedinSection3ofthismanual.

TheTC

Ucontainsfourprincipalcircuitcards:TheMCM,PCM,TCUInterface,andCustomerIO.

4.2.3.1 MCMCard

TheTCUcontainsanMCM(MasterControllerModule)card.TheMCMisamicroprocessor‐basedcontrollerusedfor

allcriticalsystemcontrolfunctions.Inadditiontocontrolfunctions,theMCMisresponsibleformaintaininglife

supportoperationwhenthePCMcardisnotoperational.

4.2.3.2 PCMCard

TheTCUcontainsaPCM(ProcessorControlModule)card.ThePCMcontrolsthecolorpanelPCGUItouchscreenfor

enhancedmonitoringandcontrol.Italsoprovidestransmittersystemdata,faultlogs,webremoteconnectivityvia

TCP/IPconnection,SNMPerrortrapreportingandconfigurationandsetupinterface.

4.2.3.3 TCUInterfaceCard

TheTCUcontainsaLAX/UAXTCUinterfacecard,whichinterfacestoseveralofthesubsystemsoftheVAXdualdrive

configurationandreportsdirectlytotheMCM .ItinterfacestothetwoLPUsandcommandsthemtoassumea

masterorslavestatus.(pin14ofparallel“TXInterface”connectionviaDB

25).ItalsocommandsthedualdriveRF

coaxialrelaytoperformanLPUswitchover,whenrequired.Thesysteminterlockconnectionismonitored(RS‐485/

ILOCKbusviaDB9)toensuretheinterlockisclosedandthesystemmaybeoperatedsafely.

FRONT

PANEL

PC (GUI)

FRONT

PANEL

BUTTONS

MASTER

CONTROL

MODULE

(MCM)

PROCESS

CONTROL

MODULE

(PCM)

CUSTOMER

I/O

CARD

TCU

INTERFACE

CARD

OPTIONAL TRANSMITTER CONTROL UNIT (TCU)

TX ROOF

INTERLOCK

CONNECTION

(ASF)

LPU B

LPU A

BLOCK(S)

DB25

RS485/ILOCK

CAN

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Sharp SD-AT1000W Dokumentacja Strona 168

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