Simplex 2120 Multiplex, ET Concepts Technical Training

a Simplex Multiplex Concepts 1987SlmplOXTlmeRacorderCo Mass 01441 0001 OBJECTIVES AND ORGANIZATION publication course you will be able to install operate program and service any 2120 system the 2120 Multiplex system a continuation course Once you have completed Before reading this training manual be sure you have studied the 2120 Multiplex BT and FABT Concepts you have not read the BT and FABT concepts manual do so now before reading further manual objectives this manual are listed below Be able to list the similarities between ETs and the other 2120 transponders you have studied Be able to list the differences between ETs and the other 2120 transponders you have studied Be able to explain how the two ET control point sensing assignments are used Be able to define the function s of each of the following board converter board cards cards Be able to correctly number the daughter and I O cards in an ET cabinet Be able to list the two ways that the ET can transmit and receive 2120 data Be able to explain the meaning of any given ET monitor and control point number no need concept of expanded opportunity manual Give become comfortable with your rush through above all IF YOU HAVE A QUESTION YOUR COURSE ADMINISTRATOR OF 2120 TRANSPONDER CONCEPTS if you can correctly answer each of the following general questions about 2120 transponders When yot check your answers against on page 25 you answer Multiplex BT and FABT Concepts manual than four of the five questions correctly you might want to review some of the material the How many transponders there be on one 2120 communications What makes possible the BMUX to distinguish between one 2120 transponder and another What does the number to what applications are BTs used what applications are FABTs used previous publications 2120 transponders the brains of the 2120 then the transponder we have learned and FABTs are and how they are used Now we want to look at another then see how ETs compare a more detailed picture of how the ET works the the 2120 eyes ears and hands We also learned what or ET We first see what ETs look like and what role they play in the 2120 polling cycle make up an ET to BTs and FABTs Later we look at the components BMUX to all external devices of 2120 1 CRTs OR TAPE 1 COUNTS AS AT ONE Fs l L AN TRANSPONDER expanded more monitor and control points But even though ET bears little physical is just what BTs and FABTs name 2120 transponder with expanded capabilities BMUX an ET as just another you are ET a backbox group of ET CPU board the ET status to the BMUX controls all ET functions and eight daughter mounted of these daughter a support up to eight monitor points or four points and each card points to the CPU board per daughter card that interface by the ET daughter cards daughter connected cards points BOARD CARDS CARDS ON CONVERTER ET power supply for special security peripherals An ET power supply is required converts AC power to use by other ET equipment The supply can also provide signal power for signal circuits and each ET in a 2120 system power converter CPU board and its daughter cards converts 28VDC the ET power supply voltages used by the of the results of the ET physical is a greatly point capacity over BTs and FABTs compared eight for BTs and FABTs to 32 control compared four for BTs and three for FABTs ET CAN SUPPORT to 64 monitor mix of monitor and control points fact there there are many points on an ET changes way we assign ET monitor and control point numbers see how MONITOR AND CONTROL POINT NUMBERS can be so many points on an ET we number ET points BT and FABT points An ET has an address point number are the channel and transponder number differently one ET point and another however we must assign a slightly different way from the way we as any transponder does so the first three digits of an the same for any system point number To last three digits of the ET point points are numbered this DAUGHTER THROUGH 8 NUMBER THROUGH 8 FOR MONITOR THROUGH 4 FOR POINTS we would 3 Notice that it is not always possible number 205 703 could refer to either point number above as 2 fifth distinguish between ET monitor and control point numbers take care to note custom in ET point status reports card 7 point ET Daughter Cards that we use card numbers located Counting ET daughter cards is simple and is illustrated below identify daughter and I O card combination on which the point of imerest CARDS ARE NUMBERED BOTTOM TO locate the I O card associated with a daughter card just trace the harness connecting two TO ET ADDRESSING we were discussing ET point numbers we said that ETs have addresses one address each ET in a 2120 system package on the ET CPU board one address The ET address as BTs and FABTs each selected via a DIP ETs have addresses we know does participate the 2120 polling cycle as any other TRANSPONDER COMMUNICATIONS transponders exchange data with the review what we know about a transponder the BMUX when during polling cycle Each transponder passes current status We know how of its monitor points have had a status change unless and FABTs keep track of status changes ETs though have more points than BTs and FABTs and so must track of status changes monitor point status BMUX demands a slightly different way in communications see how POINT STATUS REPORTING we said before ET I O cards interface external monitor and control point wiring to the daughter cards Daughter contain scan external ET point wiring sensing circuitry Unlike FABTs ET can supervise control points without surrendering monitor points to do so Hence control points