S$implex Multiplex Single Channel Voice Communications General Information. Technical Manuals Online! -

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1 S$implex 2120 Multiplex Single Channel Voice Communications General nformation 0 i987~i~pl~xtl~or~rderco.,g~dner. Mass U.S.A. MUx2-1 l-003 Ed387

2 CAUTON ELECTRCAL HAZARD Disconnect electrical power when making any internal adjustments or repairs. installation and servicing should be pettormed by qualifted Simplex Representalives. CAUTON POWERNG REQUREMENT When removing power from thii system, disconnect batteries FRST and AC power last. When connecting power to this system. connect AC power FRST and batteries last.

3 HOW TO USE THS PUBLCATON This publication provides information on 2120 Multiplex systems equipped with 2001 voice communications equipment. Typical equipment configurations are illustrated, as are specific interconnections between 2120 and 2001 equipment. This manual is divided into the following sections:. MAN EQUPMENT. REMOTE EQUPMENT. CLASS A AUDO Each of these sections is divided into subheadings covering specific topics. MPORTANT! This manual is intended for those who already have a solid background in 2120 Multiplex systems and 2001 Voice Communications equipment. Refer to 2120 and 2001 voice communications training materials for basic information. FOR MORE DETALED NFORMATON... refer to the documents listed below Voice Communications Wiring Diagrams 2001 Systems Troubleshooting Guide 2001 Voice Communications Module Descriptions BMUX with Voice Communications interconnection, W.D. No Multiplex System nstallation manual System interconnection drawings for the specific installation Equipment cabinet drawings for the specific installation M and M-2120~ET initiating wiring diagrams NTRODUCTON 2120 Multiplex systems that use 2001 voice communications equipment are configured differently from their 2001 counterparts. Since 2120 systems fall in the large building or building complex range of applications, a 2120 system equipped with voice communications equipment requires a special approach to system set up - we don t want to lose the multiplex advantage just because we want voice communications. One major difference is shown in Figure 1. Since we must provide audio signals to each building floor, 2120 systems use what we call an audio riser. An audio riser is typically a single wire pair that carries an amplified audio signal to transponder cabinets where the audio signal is applied to FABT or ET speaker circuits (via audio relay boards). As you can see in the block diagram, most FABT or ET cabinets that contain audio relay boards also contain an audio interface transformer and a remote amplifier. The BMUX equipment cabinet contains the voice communication equipment required to originate system audio signals. The SCC cabinet, usually close-nippled to the BMUX cabinet, contains what we call the power preamp. This preamp boosts the original audio signal so that the signal can make it to its destinations without loss of quality. The equipment in the BMUX cabinet is connected to equipment in the SCC cabinet via a harness assembly; the BMUX s local BT is used to monitor and control both BMUX and SCC audio equipment conditions. 1

4 Let s look at the various components of a 2120 voice communications system. We ll start where the original audio signal starts - at the beginning of the audio riser. Throughout this publication we will use 2001 product identification numbers for voice communication equipment to make it easier for you to cross-reference 2001 voice communications documentation. AUDO RSER TOOTHERTRANSPONDER CA ETS \ AUDO N TO EACH NDVDUAL AUDO REU ij--*t+ OTHER TO (TRANSPONDERS SPSAKER TRANSPONDER n NTHESAME clrc m CABNET CABNET r AUDO N TO EACH lndlvld AL : AUDO RELAV TRANBPoNDENB NTHEBAME CABN SPEAKER cu?cun?3 DATA TO/FROM TNANSPONDENB TMNSPONDER CABNET i EMUX CABNET CLOSE- NPPLED CABNETS SCC CABNET COMMUNlCAllON$ n \ A&O HARNESS ig--t p WSER OUT 2120 Voice Communications Block Diagram FGURE 1 2

5 MAN EQUPMENT This section discusses the voice communications equipment used in the BMUX and SCC cabinets, and also the interconnections between that equipment and 2120 equipment. THE BMUX (FGURE 2) A typical BMUX cabinet configuration in a 2120 voice communication system is shown in Figure 2. The voice communications equipment used in the BMUX cabinet is listed below. l A microphone enclosure assembly ( ) consisting of: - an oscillator control switch module ( ) - One of the following preamp monitor modules: (a) , (b) , used in systems with no backup amplifiers. used in systems with backup amplifiers. l An audio control module ( ) l An optional message player assembly consisting of: - a digital message player ( ) - a timer ( ) - a four-place card rack ( ) NOTES 1. All models prior to March, 1967 contain a tape player ( ) rather than a digital message player ( ). 2. A fire fighter s telephone could be used in place of a message player assembly. (f both are required, the telephone will be mounted in the SCC cabinet.) The fire fighter s phone is described in the 2120 Multiplex Fire Fighter s Telephone - General nformation publication. Figures 3 through 5 illustrate the interconnections between each voice communications component and the BMUX equipment. You ll notice that local BT monitor and control points are used to implement various audio functions (such as monitoring the ALL CRCUTS switch on the oscillator control switch module or supervising the preamp monitor module). We do this so that programs can be written to make the voice communication system operate as we want. For example, local BT control point 1 is used to activate the audio system on alarm - a programmed function.

6 AUDO CONTROL MODULE * DGTAL 1 MESSAGE PLAYER (OPTONAL) l Models prior fo March, 1987 contain a tape player rather than a digital message player. Typical BMUX Cabinet Configuration FGURE 2

7 MCROPHONE ENCLOSURE - L - +voljt FOR PREAM MONlTOR TROUBLE \vollt VHEN ALL ClRCUlTS 5WlTCH ACTVATED --OV OUT WHEN OSC STOP SWTCH ACTVATED; USED N PROGRAMMNG TO BYPASS AUDO TROUBLES DURNG OSCLLATOR STOP CONDlTlONS +V WHEN AMP TROUBLE (FROM POWER PREAMP N SCC CABNET) - 1 LOCAL BT MONTOR PONTS (SEE NOTE) NOTE: Only one input leg is needed at each local BT monitor point because: 0 +V looks like a short to a local BT monitor point. 0 OV looks like an abnormal condition to local BT monitor point 5. (OSC STOP) TB2 ON LOCAL BT /O BOARD Microphone Enclosure Assembly FGURE 3

8 MKE NTERFACE/MUSC BOARD TO MESSA&E (OR TAPE) PLAYER ASSEMBLY; ACTlVATED TMER TO COMPLETE AUDO SYSTEM ACTlVATlON (VA HARNESS) AUDO SYSTEM AUDO sgnal OUT TO POWER PF EAMP NSC- :C CABNET -- (VA HAR -NESS) r + 24VDC FROM BMUX POWER SUPPLY VA AC VO BOARD TB2 ;CllO COMMON 0 9 N/C CONTACT CONTACT CLOSURE OF CONTROL PONT 1 PROVDES + V TO ACTVATE AUDO SYSTEM -cl 0 NO CONTACT q 0 LOCAL ET CONTROL PONT 7 COMMON 1 6 NC CONTACT 6 NO CONTACT cl4 PART OF N/C CONTACT CONTROL PONT 3 COMMON 1 2 C 1 NOCONTACT Audio Control Module FGURE 4 6

9 +VNTO ACTVATE TMER; FROM LOCAL BT CONTROL PONT 1 VA AUDO CONTROL MODULE r ov- MESSAGE (OR TAPE) PLAYER TO AUDO CONTROL MODUAL (OSC STOP + 24V POWER TO MESSAGE (OR TAPE) PLAYER; NTERRUPTED MOMENTARLY VA CONTROL PONT 2 TO RESET PLAYER r. L= 10 COMMON 0 9 N/C CONTACT ]+24VDC FROM BMUX POWER SUPPLY VA AC /O BOARD TB2 cl 6 WO CONTACT LOCAL BT CONTROL PONT cl 7 COMMON 1 cl 6 N/C CONTACT q 6 WOCONTACT cl4 cl 3 COMMON PART OF cl 2 NC CONTACT CONTROL PONT 2 C 1 NtO CONTACT 1 TB4 ON LOCAL BT l/o BOARD Message Player Assembly FGURE 5 7

10 Figure 6 shows two typical transponder specification sheets for the local BT, listing the functions of local BT monitor and control points in a voice communications system. s Simplex 2120 TRANSPONDER CO YTNUATON SPECFCATON SHEET TRANSPONDER SPECFCATON WORKSHEET 0 E L-N b 0 P 1 -, , R j ; -,.a 3, :,i 5 3 1x1 ^ , ~ lltl~ll -r_..._ _- -.. t.- Y Local BT point assignments, 2120 dual channel 1, 8,,,,,,,,,,,,,, au Co, no message player TRANSPONDER SPECFCATON WORKSiEET Jy~~Jc L!i!L [Ti=R&sLl*~,.,wc \ 1 i c 7 3 xl YllW 2 11x N] Typical Transponder Specification Worksheets For Local BT Voitx Comm. Functions FGURE 6 THE SCC (FGURE 7) The typical SCC cabinet configuration in a 2120 voice communications system is shown in Figure 7. The SCC cabinet can either contain: 0 A single power preamp assembly ( ). OR l f a backup amplifier is required, a dual power preamp assembly ( ). Figure 8 illustrates the interconnection between the SCC power preamp and the equipment in the BMUX cabinet. 6

11 , MAN POWER\ PREAMP, 3 Typical SCC Cabinet Configuration FGURE 7 9

12 AUDO SGNAL N CO::LA:;:ULE N BMUX CABNET (VA HARNESS) POWER PREAMP N BCC CABNET + V OUT WHEN AMP TROUBLE TO LOCAL BT MONlTOR PONT 7 VA HARNESS \3 C, Y AUDO OUT TO AUDO RSER (VA CONTRACTOR CONNECTOR BLOCK N SCC CABNET- SEE SPECRC SCC CABNET DRAWNG FOR DETALS) Power Preamp Connections FGURE 8 10

13 REMOTE EQUPMENT This section discusses the voice communications equipment used in FABT and ET cabinets and how that equipment is tied into the 2120 audio riser. Note: The term voice/phone basic transponder (VPBT) refers to an FABT with audio equipment. We ll use VPBT to refer to such on FABT. THE VPBT (FGURE 9) A typical VPBT cabinet configuration in a 2120 voice communications system is shown in Figure 9. The voice communications equipment typically used in the VPBT cabinet is listed below. l An audio interface transformer ( ) when a remote amplifier is used. l One of the following remote amplifier assemblies: - a single 5OW amplifier ( ). OR - a dual 50W amplifier ( ) if backup is required. l One or more audio relay boards. (See transponder parts list for audio relay board PNS.) AUDO NTERFACE- TRANSFORMER CONTRACTOR TERMNAL BLOCK lremote AMPLFER Typical FABT (VPBT) Cabinet Configuration FGURE 9 11

14 Figure 10 illustrates how VPBT equipment is tied into the audio riser. AUDO RSER N (VA CONTRACTOR TERMNAL BLOCK N VPBT O~ABNET) TBl REMOTE AMPLRER N VPBT OR ET CABNET AUDO \ AUDO RSER NTERFACE AUDk SGNA; OUT OUT OllA CONTRACTOR TRANSFORMER TO TERMNAL BLOCK N AUDO RELAY BOARDS VPBT OR ET CABNET) (VPBTS) OR TO AUDO RELAY 10 BOARDS, CLASS A (562450) (ETS) +V OZWHEN AMP TROUBLE; TO AN ETOR FABT MONlTOR PONT FOR TROUBLE REPORT NOTE: Refer to M-2120 or M diagrams for connections to audio relay boards. Remote Amplifier Connections FGURE 10 12

15 THE ET (FGURE 11) A typical ET cabinet configuration in a 2120 voice communications system is shown in Figure 11. The voice communications equipment typically used in the ET cabinet is listed below. l An audio interface transformer ( ) when a remote amplifier is used. l One of the following remote amplifier assemblies: - a single 50W amplifier ( ). OR - a dual 5OW amplifier ( ) if backup is required. l One or more audio relay /O boards ( ). Figure 10 illustrates how the ET voice communications equipment is tied into the audio riser. *( CONTRACTOR AUDO \ NTERFACE * o TERMNAL BLOCK TRANSFORMER < \ REYOT AMPUAER \ BACKUP REMOTE AMPLlFlER (F USED) Typical ET Cabinet Configuration FGURE 11 13

16 A SPECAL NOTE ON AUDO SUBRSERS n many 2120 voice communications applications you will find VPBTs in remote locations that do not use remote amplifiers. f such a VPBT is not close-nippled to a VPBT cabinet containing a remote amplifier, we must supervise the audio wiring between the two VPBTs. We call such audio wiring an audio subriser. The audio subriser is supervised via an audio relay circuit in the VPBT cabinet containing the remote amplifier. The drawing below illustrates a typical audio subriser application. CLASS A AUDO This section discusses how we provide Class A audio operation for standard 2120 voice communications systems. To provide Class A operation, all we need do is add a single component - the Class A audio monitor assembly, (Figure 12). This assembly consists of an audio monitor board and a mounting bracket; it mounts in the SCC cabinet as shown in Figure 13. BRACKET CLASS A.AUDO MONlTOR BOARD (PN ) Class A Audio Monitor Assembly, FGURE 12 14

17 MOUNTlNG LOCATlON FOR CLASS A AUDO MONlTOR ASSEMBLY (SAME AS AUDO NTERFACE TRANSFORMER- ON REMOTE AMPLRERS) Typical Location of Class A Audio Monitor FGURE 13 15

18 Figure 14 illustrates.in block diagram form how the Class A monitor works. The audio monitor simply looks at the end of the audio riser to ensure that the audio signal is indeed being received by all remote amplifiers. A break in the audio riser results in a loss of audio at the audio monitor, and so its internal relay (Kl) simply energizes to allow the audio signal to be fed from both ends of the audio riser. REMOTE AMP 0 REMOTE CLASS A AUDO MONlTOR r CONTRACTOR TERMNAL BLOCK 1 N SCC --w.--: CABNET POWER PREAMP Class A Audio Block Diagram FGURE 14 Thus, all remote amplifiers still receive the audio signal. Local BT monitor point 3 is used to supervise the audio monitor and report Class A activation. The interconnections for the Class A audio monitor are shown in Figure 15. END OF +24V AUDO RESEl FROM MKE ENCLOSURE ASSEMBLY - N BMUX c (VA HARNESS) A F=fER ++ -TBLOUTTOLOCALBT. U 0 5 SKiN a TBl POWER PREAMP / \ AUDO OUT B c TO RSER VA CONTRACTOR TERMNAL BLOCK Class A Audio Monitor nterconnections FGURE 15 16

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20 BaSimplex Ed 3 87 Simplex Time Recorder Co., l Simplex Plaza l Gardner, Massachusetts U.S.A. MUX2-1 i-003 1