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2. MS 812 Programmable Master Station 6 3 ASSEMBLY 710234 MS 812 FRONT PANEL PCB BOM 1 4 W 5 RESISTORS DESCRIPTION REF DESIGNATORS 100 OHMS R1 R33 CC P N 410071 410044 410012 410013 410016 680 OHMS R67 3 9 K OHMS R66 4 7 OHMS 10K OHMS R68 R69 R34 R35 R36 R37 R38 R39 R40 R41 R42 R44 R46 R48 R50 R52 R54 R56 R58 R60 R62 R64 POTENTIOMETERS DESCRIPTION REF DESIGNATORS 50K TRIMPOT P1 P16 P18 500 OHM TRIMPOT P17 50K P C MOUNT POT P19 P15 CC P N 470038 470060 470061 CAPACITORS CC P N 150035 150040 150099 DIODES CC P N 480000 DESCRIPTION UF 50 V MONO ELECT Moh 100UF 25V ELECT DESCRIPTION 1N4148 SIGNAL DIODE INTEGRATED CIRCUITS CC P N 480121 480143 480169 SWITCHES CC P N 240064 240065 510086 510088 510089 10 90 Rev 0 1 DESCRIPTION REF DESIGNATORS C4 C6 REF DESIGNATORS D1 D36 C3C20105 547 lku 74HC240 CMOS TRI STATE INV BUFFER 74HC374 CMOS TRISTATE OCTAL D FL FLOP UCN 5833 32 BIT POWER SHIFT REG W LATCH DESCRIPTION SMALL KEYCAP LARGE KEYCAP PUSHBUTTON SW VEETRONIX PUSHBUTTON SW SPDT PUSHBUTTON SW SPDT 50195 REF DESIGNATORS IC2 IC3 REF DESIGNATORS SWe25 SW33 SW1 SW24 SW1 SW33 SW34 SW36 SW35 BILL OF MATERIALS MS 812 Programmable Master Station NMOHS 3015 LNJNOdNWOO 8 HHTHH _
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4. S3LON gt 5 Jasen 218 5614 SOLLVW3HOS 31901 ASL 31907 ASL 9 4 071 06 1 0273 61 91 614 n st gr nO2N3 Nt 6 m tqasnNn PAS a rot om jz sI 8 1 z e v s 8 iis IT Wm TIYWS 2 ha Gs me 28 i T HI C mO T HW MO T mo L L 81 10 2 ____ M wch llle lel Weer CEE EE S je o 950 9108 0213 LNONId 5 D Lg e amp uoneis zL8 SIN 80 SOLLVINAHDS 062014 ASV 2 5 o cC o N 9 2 E 9 Figure 7 6 XLR Module Schematic Rev A 11 90 Rev 1 0 SCHEMATICS Clear Com MS 812 Programmable Master Station IFB 1 4 J25 IFB 5 8 J26
5. gt EP 50 i OS 8 saw s n S pre ow 12 7 AMP SUPPLY L 80 VI 1t 25 t ONI LCD DISPLAY ASYK 720100 DIGITAL GND V LAMP GND gt RT e Sf eS S STSTSTSTSS or anmwn or u2 100uf amp 8 9 GND Figure 7 3 Front PCB Schematic Rev A 11 90 Rev 1 0 26 paz 72 te ale 16 50K n i R69 4 7K Pia TONE 15 PROGRAM FEED 32 SPEAKER MUTE 33 20 27 4 7K PROGRAM 28 INTERCOM 29 82 ETE med REFERENCE DESIGNATORS LISTEN TRIMS I i I I 1 I l e a gt u lt 5 5 ESI G Z lt lt lt 2 O eN gt e m E a a a m 1 c lt 2 S o z 43 45 47 43 51 53 55 57 59 51 t Ob 06 11 dwy anliy
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8. 5 1 6 AUDIO BIAS AND VCA REFERENCE SUPPLIES The audio circuitry is powered from a single 30 volt supply When operating OP amps in an unbalanced mode they need a bias reference vottage that should be 1 2 the supply The two sections of iC10 are buffers providing a low impedance bias voltage for this purpose B1 is a general bias source for most of the audio circuitry B2 is reserved for use with the VCAs and their OP amps The control voltage for the VCAs must swing between 5 volts above bias and bias For this reason VR5 is referenced to B2 providing a supply voltage that is stable 5 volts above B2 bias for the VCAs 5 2 MICROPROCESSOR AND LOGIC DESCRIPTION 5 2 1 MICROPROCESSOR DESCRIPTION The control system of the MS 812 is based on a central bus oriented microprocessor The first 8 bits of data and address are multiplexed together and are separated by 4 providing 0 7 as a separate bus IC5 is a EPROM that provides program memory for the processor IC6 provides 4K bytes of static operation RAM for the processor IC8 is an address decoder for the various memory mapped devices 1 9 is a RESET control device monitoring the 5 volt supply in case it is out of range IC2 is a serial access 512 byte EEPROM device that stores the SETUP memory for the system GUIDELINES FOR TROUBLESHOOTING MICROPROCESSORS 1 Catastrophic failures of a firm ware controlled microprocessor are rarely caused by program faults If pr
9. 6 91 Rev 1 1 PROGRAM FEED DEFAULT Disabled on all channels MENU TYPE Normal DIP SWITCH ENABLING None Sends a program signal to any combination of intercom channels Can be programed to provide internal PROGRAM INTERRUPT function refer to 4 6 10 Page 4 15B OPERATION 5 812 Programmable Master Station 4 6 10 PROGRAM INTERRUPT PROGRAM INTERRUP DEFAULT Disabled on channels MENU TYPE Normal DIP SWITCH ENABLING None Causes a PROGRAM INTERRUPT function to take place when a channel TALK button is activated NOTE For a channel to be ENABLED for PROGRAM INTERRUPT the PROGRAM FEED must have been ENABLED in the previous menu RELAY ASSIGNMENTS LOCAL RELAY 1 DEFAULT None programmed MENU TYPE Sub Menu in Extended Mode DIP SWITCH ENABLING None This allows the relays both LOCAL and GLOBAL to be activated by any combination of the front panel buttons There is a separate menu item for each of the six relays 2 local 4 global 4 6 12 PRIVATE TALK 6 91 Rev 1 1 PRIVATE TALK DEFAULT Enabled for ISO and SA MENU TYPE Extended Mode DIP SWITCH ENABLING None When a button is programmed for PRIVATE TALK activation of that button will momentarily disable other TALK paths while the button is active With the vate Talk disabled ISO and SA will not disable other talk paths when activated OPERATION MS 812 Programmable Master Station 4 6 13 PR
10. Rename Current SETUP AN INTERNAL DIP SELECT SWITCH ENABLES THIS FUNCTION Figure 4 3 Extended Menu 6 91 Rev 1 1 Page 4 11 OPERATION Clear Com MS 812 Programmable Master Station 4 5 1 ENTERING PROGRAMMING MODE Pressing and holding NEXT V and BACK buttons together for one second will cause the LCD screen to display MENU and enter the programming mode While the word MENU is displayed quickly releasing and pressing both buttons again will cause the station to access the EXTENDED MENU if it is enabled with a DIP switch See section 4 5 MENU EXTENDED 4 5 2 STEPPING THROUGH MENUS When the system is in the programming mode the NEXT V and BACK A buttons are used for stepping through the menus Pressing and releasing NEXT steps forward in the menu while pressing and releasing BACK A steps backward 4 5 3 SUB MENU ACCESS If a Sub Menu selection is displayed pressing the flashing SA key at this time will open a series of related Sub Menu items After pressing the SA button the Sub Menu is available with the NEXT V button A Sub Menu that has been opened will remain open during the entire programming session even if the particular Sub Menu is left and then returned to 4 5 4 EXITING PROGRAMMING MODE Pressing both NEXT V and BACK A buttons together while in any of the above menus will exit the programming mode and return the MS 812 to normal operation 4 6 DESCRI
11. SA Output Low 2 3 3 EXTERNAL SPEAKER CONNECTION The 1 4 inch phone jack marked EXTERNAL SPEAKER provides rear panel access to the speaker power amplifier The internal speaker is connected to normally closed contacts in the jack Plugging into the jack will disable the internal speaker The output will drive an 8 ohm speaker Jack Connections Speaker Out Sleeve Speaker Common 2 3 4 MA 4 INTERRUPT LINK CONNECTION The 1 4 inch phone jack in the lower right corner of the rear panel marked MA 4 INTRPT is the MA 4 Link Output allowing a MA 4N to share the use of the panel microphone of the MS 812 Pressing an IFB button on an external IFB control panel located close by usually mounted just above the MS 812 will generate a control signal causing the MS 812 to interrupt what it is doing and provide an audio feed to the 4 Jack Connections i Microphone Preamp Out Control Signal Aprox 15 VDC Sleeve Common Ground 11 90 Rev 1 0 Page 2 11 INSTALLATION MS 812 Programmable Master Station 2 3 5 DB 15 AUXILIARY AUDIO CONNECTIONS The DB 15F connector on the right end of the rear panel provides three auxiliary audio input and outputs MIC GND GND PGM GND PGM 2 LO HOT MIC MIC HOT N C LEFT EAR RIGHT EAR 2 N C HOT MIC LO HOT MIC GND Figure 2 9 DB 15 PINOUT 2 3 5 1 PROGRAM INPUT 2 A second PROGRAM INPUT
12. aln OT 1 11 2 0014 ASSY 0 08 218 9 8 5 1 4 Location of Main Board Option Switches Jumpers Figure 2 14 Page 2 16 11 90 Rev 1 0 INSTALLATION Clear Com MS 812 Programmable Master Station 2 7 INTERNAL OPTIONS There are a number of internal option switches and jumper located on the main PCB in the MS 812 To access these jumpers and switches remove the top cover of the unit Refer to the diagram on the previous page for location of these options 2 7 1 OPTIONAL PROGRAM 1 FEED TO SPEAKER Default ON As shipped from the factory Program 1 input will feed both Intercom program feed and Program listen on the Speaker and Headphones If a second program feed is used available on the DB 15 connector remove the jump jack on J32 to remove Program 1 from the Speaker and Headphone feed 2 7 2 OPTIONAL PROGRAM FEED TO LEFT EAR Default ON As shipped form the factory the MS 812 is intended for use with a Monaural headphone through the front panel headphone jack If a stereo headphone is connected through the DB 15 it is usually desirable that Intercom be in one ear while Program be in the other Remove the jump jack on J34 to remove program from the left ear 2 7 3 OPTIONAL GLOBAL SA FEED TO ELCO EDAC CONNECTORS Default OFF If the ELCO multi pair cable rear panel connector option is used the SA signal would be available in
13. 4 14 200000000000006 99000606006 99 e009095000000005 eg 31 26 ZAA GO SNIWW4O3 Qv31 zh b WIXI 1 Wir Ww w F E M 2204 79 55970 4 218 50 m iet 18 5 08 82d lt 1041 WWL30 335 Figure 6 3 Main PCB Assembly Drawing Page 6 8 10 90 Rev 0 1 BILL OF MATERIALS MS 812 Programmable Master Station 6 4 ASSEMBLY 710232 MS 812 MAIN PCB ASSEMBLY BOM 1 4 5 RESISTORS CC P N DESCRIPTION REF DESIGNATORS 410113 410002 410004 410112 410008 410038 410071 410072 410060 410005 410106 410054 410010 410041 410014 410011 410040 410015 410170 410013 410056 410137 410036 410171 410100 410016 410031 410017 410032 410151 410018 410020 410024 410079 410109 410028 410033 410030 410045 410058 410059 4 91 Rev 1 1 2 2 OHMS 10 OHMS 22 OHMS 27 OHMS 39 OHMS 82 OHMS 100 OHMS 200 OHMS 240 OHMS 390 OHMS 430 OHMS 620 OHMS 1K OHMS 1 2K OHMS 2K OHMS 2 2K OHMS 2 7K OHMS 3 3K OHMS 3 6K OHMS 4 7K OHMS 5 6K OHMS 6 2K OHMS 6 8K OHMS 7 5K OHMS 9 1K OHMS 10K OHMS 12K OHMS 15K OHMS 18K OHMS 20K OHMS 22K OHMS 33K OHMS 100K OHMS 120K OHMS 200K OHMS 220K OHMS 330K OHMS 470K OHMS 680K OHMS 1M OHM 10 M OHMS R140 R190 R208 R134 R135
14. ALL IN ACTIVATE ALL IN TIME AUTO CALL OUT PROGRAM INTERRUPT 1 Submenu LOCAL RELAY 1 LOCAL RELAY 2 LOBAL RELAY 41 LOBAL RELAY 2 LOBAL RELAY 3 LOBAL RELAY 44 PRESET EXCLUDE SET IFB BUTTONS 150 Submenu SET ISO BUTTONS ISO STA 8 ISO 1ST CHA RENAME SETUP H FLASHING SA BUTTON Select Buttons for PRESET 1 Select Buttons for PRESET 2 Select Buttons for PRESET 3 Select Buttons for PRESET 4 ADDITIVE or INTERLOC Mode Select Select Buttons for FOOT SWITCH Activation FLASHING SA BUTTON Enable CALL IN for INTERCOM Channels Enable BEEP on CALL IN Enable TALK and or LISTEN on CALL IN Set Length of CALL IN TIME OUT Select Buttons for Automatic CALL OUT Enable PROGRAM FEEDS Enable PROGRAM INTERRUPTS FLASHING SA KEY Select Buttons Select Buttons Select Buttons Select Buttons Select Buttons Select Buttons for LOCAL RELAY 1 for LOCAL RELAY 2 for GLOBAL RELAY 1 for GLOBAL RELAY 2 for GLOBAL RELAY 3 for GLOBAL RELAY 4 Select TALK Buttons for PRIVATE TALK Select LISTEN Buttons for PRIVATE LISTEN Select AUTO LISTEN with TALK Button Disable LATCHING of a Button Select Buttons to be Locked OFF Select Buttons to be Locked ON Select Buttons to EXCLUDE from PRESET Select Position Buttons for IFB Function FLASHING SA KEY Select Position Buttons for ISO Function Select ISO Control Station Select Start Channel 4 for ISO
15. LATCH DISABLE BUTTON LOCK OFF BUTTON LOCK ON PRESET EXCLUDE Set IFB BUTTONS Set ISO BUTTONS Set ISO STATION NUMBER Set ISO First Channel Number Rename SETUP MAINTENANCE Power Supply Descriptions Ground Isolation Digital 5 Volts Digital 15 Volts Lamp Regulated Supply 30 Volt Audio Power Supply Audio Bias and VCA Reference Supplies Microprocessor and Logic Description Microprocessor Description Front Panel Logic Flow Line Drive Module Control Main Board Audio Control ExternaL ISO System Interface Analog Description CLEAR COM Line Drivers Use of VCAs Gain Structure Dynamic Mic to Internal Talk Bus Gain internal Talk Bus to Intercom Line Gain Internal Talk Bus to Hot Mic and Local SA Gain Internal Talk Bus to Global Sa Gain Ballanced Program Inputs to Internal PRG BUS Gain Internal PRG BUS to Intercom Line Gain Intercom Lines to Listen Bus Gain Internal Listen Bus to SPEAKER Gain page i 8 TABLE OF CONTENTS MS 812 Programmable Main Station 5 4 SECTION 6 6 1 6 2 6 3 6 4 SECTION 7 Figure 7 1 Figure 7 2 Figure 7 3 Figure 7 4 Figure 7 5 Figure 7 6 Figure 7 7 11 90 Rev 0 2 Internal Listen Bus to HEADSET Gain Trouble Symptoms Possible Causes amp Solutions BILL OF MATERIALS Chassis Assembly Line Driver Module Front Panel PCB Assembly Main PCB Assembly SCHEMATICS Main PCB Schematic 1 of 2 Main PCB Schematic 2 of 2 Front Panel PCB Sch
16. 1 MENU TYPE Sub Menu in Extended Mode DIP SWITCH ENABLING DIP SW 5 ON Enabled The user must identify first channel number that the buttons relate to for the given ISO Control Location Pressing the flashing SA button will step through the ISO 1ST CH screen The available starting channel numbers are 1 15 The last available channel number will vary according to the number of pro grammed 150 channels Page 4 20 OPERATION Clear Com MS 812 Programmable Master Station 4 6 23 RENAME SETUP 11 90 Rev 1 0 DEFAULT SETUP 1 4 MENU TYPE Extended Mode DIP SWITCH ENABLING None The name of the currently selected SETUP what is displayed during normal operation can be assigned by the user Pressing the flashing SA button will present a screen of the current SETUP name for modification A cursor will appear under the first character indicating that it is available for modification Pressing the NEXT V button will step the characters forward through the alphabet and numbers The BACK A button will step backwards When the desired character is displayed in the current character position press the SA button to move the cursor to the next position Set all character positions that need to be changed including those that are to be spaces Passing through the sixteenth character will cause the program to exit the REMANE SETUP menu The edit menu can also be exited any time by pressing both the NEXT V and BACK A
17. 5 812 TALENT 5 8 40008 DIRECTOR EZ aE CC POWER Typical IFB Installation Figure 2 11 11 90 Rev 1 0 Page 2 13 INSTALLATION Clear Com MS 812 Programmable Master Station CONSTRUCTION OF SIX PIN IFB ISO CABLES 6 PIN The diagram in Figure 2 12 will help in constructing the six pin cable We recommend a cable with 4 shielded pairs of 22 gauge wire The cable should have low DC resistance less than 15 ohms per 1000 feet This cable wiring can be used for both IFB and ISO service IFB Connector Pinout Pin 1 Ground Pin 2 30 VDC unused by MS 812 Pin 3 IFB Ch 1 Pin 4 IFB Ch2 Pin 5 IFB Ch 3 Pin 6 IFB Ch 4 The recommended cable is a 4 pair shielded cable IFB CONNECTOR 11 90 Rev 1 0 ALL SHIELDS Figure 2 12 6 PIN IFB CABLE WIRING DIAGRAM Page 2 14 INSTALLATION Clear Com MS 812 Programmable Master Station 2 6 CONNECTION 150 4000 SYSTEM Uniess ordered with one of the options listed below the MS 812 is shipped with a blank plate over holes for four XLR connectors The ISO 16 Option provides two XLR 6M connectors for eight channels of IFB and two other XLRs for ISO system connection The ISO connectors provided are one XLR 6M ISO Control and one XLR 3M ISO Audio The following is a description of the options available No extra Line Driver modules are necessary for ISO operation Once configured the MS 812 will directly control the ISO 4000 ISO system al
18. 5 812 Programmable Main Station INSTRUCTION and SERVICE MANUAL D Clear Com Intercom Systems 945 Camelia St Berkeley California 94710 510 527 6666 Clear Com 810124 11 90 REV A Clear Com MS 812 Programmable Main Station Clear Com Systems MS 812 Programmable Main Station instruction Manual P N 810124 C 1990 Clear Com Systems All Rights Reserved Clear Com Systems 945 Camelia St Berkeley Ca 94710 U S A While Clear Com makes every attempt to maintain the accuracy of the information contained in its product manuals that information is subject to change without notice 11 90 Rev 1 0 Clear Com MS 812 Programmable Station CLEAR COM LIMITED WARRANTY Clear Com products are warranted to be free from defects in materials and workmanship for a period of one year from the date of sale Clear Com s sole obligation during the warranty period is to provide without charge the parts and labor necessary to remedy covered defects appearing in products returned prepaid to Clear Com 945 Camelia St Berkeley Ca 94710 1484 U S A This warranty does not cover any defect malfunction or failure caused beyond the control of Clear Com including unreasonable or negligent operation abuse accident failure to follow instructions in the Manual detective or improper associated equipment attempts at modification and repair not authorized by Clear Com and shipping damage Products with their serial number
19. PRESETs can be ADDITIVE or INTERLOCKING see PRESET button descriptions if a preset becomes a RELAY ONLY button it will no longer follow the INTERLOCKING logic of a normal PRESET button PRIORITY PRIORITY TALLY and PRIORITY OVERRIDE The major functions such as SA IFB ISO have a predetermined priority Because these functions are exclusive interrupt or replace existing station activity they have been assigned levels of priority based on their importance In general priorities are logical automatic and transparent to the operator The priority sequence is as follows SA IFB ISO Private Intercom Listen Talk Normal Intercom activity EXAMPLE If a button is set for PRIVATE TALK it will interrupt other TALKs when it is activated however pressing an IFB button will interrupt the PRIVATE TALK function Priorities are not in effect inside a PRESET or FOOTSWITCH assignment EXAMPLE If a button set for ISO and the SA button are both placed in the same PRESET then both functions will operate PRIORITY TALLY higher priority function overrides a lower level function the lower level s button will flash at a special rate short on long off indicating that the function has been temporarily overridden PRIORITY OVERRIDE If a button has been overridden by a higher priority function and it is desired to still TALK or LISTEN to the channel simply press that button and the function will return 11 90 Rev 1 0
20. buttons Pressing the RESET button while in this menu will clear the screen and will result in default name assignment upon exit if no other is assigned MAINTENANCE MS 812 Programmable Master Station e SECTION 5 MAINTENANCE OF THE 5 812 PROGRAMMABLE MASTER INTERCOM STATION 5 1 POWER SUPPLY DESCRIPTIONS The power supplies in the MS 812 are intended to only power the internal circuitry of the unit An AC line voltage switch located inside the unit allows the 812 to operate on 115 or 230 VAC All internal power is regulated 5 1 1 GROUND ISOLATION Care was taken in the ground trace design to isolate the 5 DC logic return ground from the analog ground These two ground systems are only connected at a common point physically tocated at the power supplies The internat Ground is not directly connected to chassis in Clear Com systems 10 Ohm resistor with several bypass capacitors are connected between audio ground and chassis Clear Com intercom is based on an unbalanced audio line In large systems the AC ground for AC power sometimes has a potential difference at different locations in an installation If each Main or Master station in the system has a ground reference through their 10 Ohm resistors hum can be induced in the audio ground returns of the intercom lines connecting severa stations together produces a HUM remove all of the 10 resistors in each unit except for one it is mandatory
21. 1 2 3 4 5 5678 OR A N 5 gt x P nt Figure 7 7 Tuchel Module Schematic Rev B 11 90 Rev 1 0 Page 7 7 Glear Com 5 812 PROGRAMMING WORKSHEET intercom s LOCAL PROGRAM INTERRUPT PROGRAM FEED PROGRAM t 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 8 10 11 12 RELAYS x LOCAL RELAY 1 LOCAL RELAY 2 GLOBAL RELAY 1 EISE T ETE Ed 2 3 4 5 6 7 8 BUTTON FUNCTIONS PRIVATE TALK PRIVATE LISTEN 1 3 4 5 6 7 8 9 10 11 12 Note Button Lock ON 8 OFF are interactive If a button is locked ON it becomes not available to be locked OFF and visa versa IFBASO re 1 BUTTONS ISO BUTTONS ISO STATION ISO 1st CH Station 0 6 Channel 1 15 Use SA button to Use SA button to select select M 812 PROGRAMMING WORKSHEET JOB SHOW STATION NAME STATION SETUP NAME SETUP INSTRUC TIONS gui in PRESE T INTERCOM IFB HEN Y button lt de INSTRUCTIONS Check off button s to be included in function Bold functions are Basic Menu functions Non shaded buttons are always available in the functions Dark shaded buttons are never available in function Light shaded button availibility changes based on other programmed functions ssPRESET FOOTSWITCH PRESET 1 PRESET 2 PRESET 3 23 4 5 6 7 8 9 0 11 12 PRESET 4 56 B 9 10 11 12 CALL SIGNAL CALL IN BEEP 5
22. 6 7 B 9 10 11 12 CALL IN TIME Amount of time button continues to flash after incoming call signal is removed Clear torm 20015 1 5s 20s 1m 15m 30m Use SA button to select Clear Com form 0015 1 5 812 PROGRAMMING WORKSHEET JOB SHOW STATION NAME STATION SETUP NAME SETUP INSTRUCTIONS Fili in INTERCOM 2 S boron designations MIG ON INSTRUCTIONS Check off button s to be included in function Bold functions are Basic Menu functions _ Non shaded buttons are always available in the functions B Dark shaded buttons are never available in function Light shaded button availibility changes based on other programmed functions PRESET FOOTSWITCH PRESET 1 PRESET 2 PRESET 3 LELELLELEE ne E 1 2 3 4 5 6 7 8 9 10 11 12 5 6 9 10 11 12 PRESET OPERATION MODE FOOT SWITCH INTERLOCK TL TIT ADDITIVE Use SA button to select 2 3 4 5 67 8 9 11 12 7 9 10 11 12 CALL SIGNAL CALL IN BEEP CALL IN TIME Amount of time button continues to flash after incoming call signal is removed 5s 20s 1m 15m 30m Use SA button to select Glear Com 5 812 PROGRAMMING WORKSHEET Intercom Systems LOCAL PROGRAM INTERRUPT PROGRAM LL L L E SS 2 1 3 4 5 6 7 9 10 11 12 8 9 10 11 12 LOCAL RE
23. CMOS switches for controlling audio to and from the four line drivers The 12 CMOS switches and 4 CALL signal drivers are controlled by two 8 bit shift registers The DATA and CLOCK lines of all five modules are common Only the STROBE lines are unique to each module All five modules shift in all of the data but only the targeted module latches it The CALL signal sense circuits are constructed using a comparator with an open collector output The open collector outputs of each module are bussed together for input to the processor The sense circuits comparators are enabled by lowering their reference input to the desired threshold for CALL sensing The CALL strobes are unique for each module 5 2 4 MAIN BOARD AUDIO CONTROL The control of the audio circuits on the main PCB is accomplished through two serial shift register ICs IC26 and IC27 1C27 has open collector type outputs and is capable of sinking enough current to directly drive relays RLY1 and RLY2 1C24 and 1 2 of 1C25 is used to shift the 5 volt logic of the microprocessor output to a 15 volt logic level that can be directly connected to CMOS switches IC23 is used to decode 4 outputs from the microprocessor into 16 strobe lines used for latching the various shift registers in the system and enabling logic input to port E of the microprocessor 5 2 5 EXTERNAL ISO SYSTEM INTERFACE 11 90 Rev 1 0 and provide buffering of the ISO 4000 data bus for the MS 812s mic
24. Intercom amp 4 Ch IFB 8 Ch Intercom 4 Ch IFB amp 4 Ch ISO 4 Ch Intercom 8 Ch IFB amp 8 Ch ISO 4 Modules 12 Ch Intercom 10 Ch Intercom amp 4 Ch IFB 8 Ch Intercom amp 8 Ch IFB 6 Ch Intercom 8 Ch IFB amp 4 Ch ISO NOTE Reclocation of modules will be necessary to realize some of these possible configurations If all possible combinations are needed under software selection then 5 Modules are needed 11 90 Rev 1 0 DESCRIPTION Clear Com MS 812 Programmable Master Station 1 6 DESCRIPTION OF MS 812 FAMILY PRODUCTS MS 812 8 This model is shipped with two line amp modules and an XLR back panel ISO IFB options are not installed This model provides eight channels of intercom MS 812 12 This model is shipped with three line amp modules and an XLR pack panel ISO IFB options are not installed This model provides twelve channels of intercom IFB 40 is a four channel IFB and ISO Option that adds one additional line amplifier module to the station and rear panel connectors are installed for IFB and ISO operation IFB 80 is an eight channel IFB and ISO Option that adds two additional line amplifier modules to the station and rear panel connectors are installed for IFB and ISO operation SO 16 is an option that provides just the rear panel connectors installed for IFB and ISO operation 710229 is the Four Channel Line Driver module and can be ordered separately for expansion of an existi
25. MS 812 Intercom station is a 12 channel fully programmable micro processor controlled Master station intended to work with other Clear Com Party Line products All aspects of the station operation are under micro processor control with many operational parameters programmable by the user An LCD display is used to assist the user programming The user programmed functions are saved in Non Volatile memory EEPROM Memory and are retained during power down The MS 812 directly supports Clear Com s and ISO systems Up to eight channels of IFB can be controlled directly by the existing front panel buttons The MS 812 directly replaces the use of 4 or MA 4 in a 4000 based system Up to sixteen channels of Clear Com ISO 4000 can be controlled directly by existing front pane buttons eliminating the need for external ICP 4 control modules The Line Drive amplifiers of the unit are built on plug in modules each containing four channels There are provisions for five such modules Three modules provide twelve channels of intercom The remaining two provide eight channels of IFB If a module is not used in a given application it need not be installed These modules are hot patchable to ease repair PHYSICAL DESCRIPTION The MS 812 is buiit in a 19 inch rack mount chassis 3 1 2 inches high The depth is approximately 9 1 4 inches POWER SUPPLY IS INTERNAL The internal power supply is intended to operate only the internal circui
26. OPERATION 5 812 Programmable Master Station amp 4 1 LCD DISPLAY The MS 812 features LCD display intended to guide the user in programming the station The rest of this text will show actual displays in the context that they apply PROGRAMMING MODE During programming the LCD display shows the current menu item by name NORMAL OPERATION During normal operation the display shows the current SETUP name These names are programmable by the user refer section 4 6 23 If during normal operation a button is pressed that causes an error a BEEP tone will be issued and the display will show one of two messages BUTTON BUTTON INACTIVE LOCKED BUTTON INACTIVE This error message indicates that a button was pressed that currently has no function If the line driver module necessary to support a particular channel is not installed in the unit then this error will result If a button is programmed for ISO and an active ISO system is not connected to the unit the same error will result PRESET button has no buttons or relays assigned the same error will resuit BUTTON LOCKED Pressing a key that has been locked ON or OFF in the programming mode will produce this error Figure 4 1 Front Panet Description 11 90 Rev 1 0 Page 4 3 OPERATION Clear Com MS 812 Programmable Master Station 4 2 DESCRIPTION OF FRONT PANEL BUTTONS Most of the front pane buttons on the MS 812 are illuminated and re legendable T
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28. Page 2 18 SETUP amp ADJUSTMENT Clear Com MS 812 Programmable Master Station SECTION 3 SETUP amp ADJUSTMENT OF THE MS 812 PROGRAMMABLE MASTER INTERCOM STATION 3 1 INTERNAL OPTIONS There are a number of internal option switches and jumper located on the main PCB in the MS 812 To access these jumpers and switches remove the top cover of the unit Refer to the diagram on the page 2 16 for location of these options 3 1 1 OPTIONAL PROGRAM 1 FEED TO SPEAKER Default ON As shipped from the factory Program 1 input will feed both Intercom program feed and Program listen on the Speaker and Headphones second program feed is used available on the DB 15 connector remove the jump jack on J32 to remove Program 1 from the Speaker and Headphone feed 3 1 2 OPTIONAL PROGRAM FEED TO LEFT EAR Default ON As shipped form the factory the MS 812 is intended for use with a monaural headphone through the front panel headphone jack If a stereo headphone is connected through the DB 15 it is usually desirable that Intercom be in one ear while Program be in the other Remove the jump jack on J34 to remove program from the left ear 3 1 3 OPTIONAL GLOBAL SA FEED TO ELCO EDAC CONNECTORS Default OFF If the ELCO multi pair cable rear panel connector option is used the SA signal would be available in that cable The SA feed to this cable must be enabled using jumper J33 As this line is a bridging bus similar to Clear Com intercom
29. Panel Buttons 4 2 1 MIC ON Button 4 2 2 PANEL MIC Button 4 2 3 SPEAKER ON Button PRESET Buttons CALL Button 4 2 6 Button 4 2 7 TALK and LISTEN Buttons 4 2 8 NEXT and BACK Program Buttons Selecting Setups NEXT Button Check Function BACK 4 2 8 3 Accessing Programming Mode Stepping Through Menus RESET Button Description of Front Panel Controls PROGRAM Volume INTERCOM Volume PROGRAM FEED Trim Level SPEAKER MUTE Trim Level SIDETONE LEVEL Trim BEEP TONE Level Trim LAMP Brightness LISTEN LEVEL Trims Headset Connector Station Programming Entering Programming Mode Stepping Through Menus Sub Menu Access Exiting Programming Mode 6 91 Rev 1 1 TABLE OF CONTENTS MS 812 Programmable Master Station 46 4 6 1 4 6 2 4 6 3 4 6 4 4 6 5 4 6 6 4 6 7 4 6 8 4 6 9 4 6 10 4 6 11 4 6 12 4 6 13 4 6 14 4 6 15 4 6 16 4 6 17 4 6 18 4 6 19 4 6 20 4 6 21 4 6 22 4 6 23 SECTION 5 54 5 1 1 5 1 2 5 1 3 5 1 4 5 1 5 5 1 6 5 2 5 2 1 5 2 2 5 2 3 5 2 4 5 2 5 5 3 5 3 1 5 3 2 5 3 3 5 3 3 1 5 3 3 2 5 3 3 3 5 3 3 4 5 3 3 5 5 3 3 6 5 3 3 7 5 3 3 8 6 91 1 1 Description of Programming Menus PRESET Assignment PRESET Operation Mode FOOTSWITCH Assignment Enable CALL IN CALL IN BEEP CALL IN Activate CALL IN Time Out AUTO CALL OUT PROGRAM Feed PROGRAM Interrupt Relay Assignments PRIVATE TALK PRIVATE LISTEN LISTEN with TALK
30. USE OF VCAs continued Page 5 4 MAINTENANCE Clear Com MS 812 Programmabie Master Station USE OF VCAs continued it will be noted that because the signals in the VCA are in current mode very little signal voltage can be measured either at their inputs or outputs The SPEAKER MUTE trim control is normally disabled by a CMOS switch 29 section D shorting out the control When the microprocessor turns the switch off the control is active 5 3 3 GAIN STRUCTURE 0 0 dBv 0 774 AC Volts RMS All readings 2 dB at 1 KHz 5 3 3 1 DYNAMIC MIC to INTERNAL TALK BUS GAIN WITHOUT LIMITER ACTION INPUT Pin 2 of headset connector 55 dBv OUTPUT Pin 1 of IC11 0 0 dBv Figure 5 1 Input Pad for Mic Gain Measurement WITH LIMITER ACTION INPUT Pin 2 of headset connector 40 dBv OUTPUT Pin 1 of IC11 10 dBv 5 3 3 2 INTERNAL TALK BUS to INTERCOM LINE GAIN TALK BUS Pin 1 of IC11 0 0 dBv Terminated intercom IFB and ISO Lines 15 dBv 5 3 3 3 INTERNAL TALK BUS to HOT MIC and LOCAL SA GAIN TALK BUS Pin 1 of IC 71 0 0 dBv 600 Ohm Terminated Hot Mic or SA OUT 8 dBv 11 90 Rev 1 0 Page 5 5 MAINTENANCE MS 812 Programmable Master Station 11 90 Rev 1 0 5 3 3 4 INTERNAL TALK BUS to GLOBAL SA GAIN 5 3 3 5 5 3 3 6 5 3 3 7 5 3 3 8 5 3 3 9 TALK BUS Pin 1 of IC11 0 0 dBv 600 Ohm Terminated Global SA Output 8 dBv BALLANCED PROGRAM INPUTS to INTERNAL PRG BUS G
31. audio and control connections are discussed in Sections 2 3 to 2 8 2 2 1 STANDARD INSTALLATION XLR REAR PANEL Figure 2 3 XLR Rear Panel 12 XLR CONNECTORS Twelve male XLR connectors provide intercom line connection to the MS 812 The following pin out represents the XLR panel PIN 1 Intercom Ground Common to all 12 connectors and intercom ground PIN 2 Intercom Power Common to all 12 connectors only PIN 3 Intercom Audio Twelve individual intercom lines with selectable termination on the side of the Panel AUTION The PIN 1 Ground must be isolated from chassis ground in all cases In cable preparation be careful not to internally connect the shell of the XLR to PIN 1 TERMINATIONS Two jumper fields on the right side of the panel allow individual channel termination The OFF connector field is provided as a PARK position so that the Jump Jack will not be lost CAUTION All Clear Com Intercom lines must be terminated Care must be taken not to double terminate a line All unused intercom inputs should be terminated to keep the line drive circuits stable POWERING OF A SYSTEM EXTERNAL TO THE MS 812 The PIN 2s of the twelve connectors are connected together If 30 Volts DC is applied to of the twelve connectors it will appear on the other eleven EXAMPLE Connecting a Clear Com MS 200C 10 channels 1 and 2 of the MS 812 will place 30 Volts on all of the PIN 2s of the XLR panel A line of RS 501
32. bottom row of buttons are for TALK activation and the top row are for LISTEN activation Incoming CALL signals will flash the appropriate LISTEN button IFB Operation TALK LISTEN buttons can be programed to function as IFB channels directly controlling a CC PIC 4000 IFB system In this mode the normal intercom channel that the particular button would have talked or listened to is non functional at this station The button only controls a TALK to a particular IFB channel and automatically sends a CALL signal activating the PIC 4000 IFB controller IFB tally will flash the appropriate IFB channel The IFB function can be programmed as a PRIVATE TALK function During PRIVATE TALK all other intercom talk paths are momentarily disabled The default of the IFB function allows communications on all other intercom talk paths to continue ISO Operation TALK LISTEN buttons be programed to function as ISO channels thereby directly controlling a Clear Com ISO 4000 system In this mode the normal intercom channel that the particular button would have talked or listened to is now non functional at this station The button only controls a combined TALK and LISTEN directly to the ISO system Control signals are sent to the ISO 4000 to instruct it to place a particular station on an isolated intercom path to the MS 812 By default the ISO function is a PRIVATE TALK function all other TALK Paths are momentarily disabled during the ISO operation The bu
33. externally Two 30 pin connectors wired like a MS 808 for connection into existing 808 systems with no termination PROGRAM INPUT 1 XLR 3F OPTION SA OUTPUT TWO IFB FEEDs XLR 6M EXT SPEAKER 1 4 Phone 130 4000 Transfer Audio XLR 3M MA 4 Link 1 4 Phone ISO 4000 Control XLR 6M DB 9F RELAY FOOTSWITCH A DB 15F AUX AUDIO 2 SETS of LOCAL RELAY CONTACTS PROGRAM INPUT 2 FOOT SWITCH input HOT MIC OUT STEREO HEADSET Connection AC POWER Connector CE 22 V AC POWER Switch AC POWER Fuse 11 90 Rev 1 0 DESCRIPTION MS 812 Programmable Master Station 1 4 INTERNAL OPTIONS AND ADJUSTMENTS SIDE TONE NULL adjust controls for all line drivers GAIN TRIM for the PANEL MICROPHONE 5 dB DIP SWITCHES for enabling PROGRAMING options AC POWER Voltage SELECTION INTERNAL JUMPERS provide user options Listen feed from Program 1 Left Ear Program Feed SA Feed to ELCO Cable 1 5 MS 812 POSSIBLE CONFIGURATIONS The internal circuitry of the MS 812 is constructed to accept up to five 4 channel Line Driver modules Various configurations and sizes of the machine can be realized Line Driver modules support intercom and external IFB channels The following are the common configurations 2 Modules 8 Ch intercom 8 Ch Intercom amp 4 8 Ch ISO 3 Modules 12 Ch Intercom 10 Ch Intercom amp 4 Ch ISO 8 Ch
34. ft 48 dB 500 ft 52 dB Page 2 2 INSTALLATION MS 812 Programmable Master Station This cross talk is not present on both ends of the cable The terminated end of the cable will not contain the cross talk The remote end of the cable will have the cross talk as it is generated in the ground return and not the audio line The ideal installation would all multi channel cables originate from a central point The termination for each channel is located at this central point This type of installation is known as a Star type system If no single multi channel leg of the Star arrangement exceeds 500 ft the crosstalk should be negligible TERMINATION Unacceptable installation lt 500 Ft a lt 500 Ft Recommended Installation Figure 2 1 Two of the rear panel options for the MS 812 facilitates the use of multi pair cable in a daisy chain environment This configuration will produce acceptable results if the length of any given leg from the central termination location is less than 500 ft An accessory designed special for use with the MS 812 the 1200 would provide a central termination point for the system The 1200 has three paralleled multi pin connectors providing an easy method of implementing a Star arrangement The IP 1200 also provides breakout connectors with power distribution and overcurrent protection to readily interface to un powered remote stations 2 1 5
35. incoming call signal is removed 5s 20s im 15m 30m Use SA button to select GlearCom 5 812 PROGRAMMING WORKSHEET intercom Systems LOCAL PROGRAM INTERRUPT PROGRAM FEED PROGRAM LOCAL RELAY 1 SEE 1 2 3 4 5 6 7 B 9 10 11 12 s BUTTON FUNCTIONS PRIVATE TALK PRIVATE LISTEN 5 6 7 8 9 10 11 12 Note Button Lock ON amp OFF are interactive If a button is locked ON it becomes available to be locked OFF and visa versa as IFB ISO lt IFB BUTTONS ISO BUTTONS ISO STATION 150 1st Station 0 6 Channel 1 15 Use SA button to Use SA button to select select Clear Com form F0015 1 812 PROGRAMMING WORKSHEET JOB SHOW STATION NAME STATION SETUP NAME SETUP INSTRUCTIONS Fill in PRESET 1 INTERCOM IFB ISO 4 d button INSTRUCTIONS Check off button s to be included in function Bold functions are Basic Menu functions Non shaded buttons are always available in the functions ES Dark shaded buttons are never available in function Light shaded button availibility changes based on other programmed functions FOOTSWITCH x PRESET 1 PRESET 2 PRESET 43 EE ELTLIITILIELELlELISELT EE SEES 6 1 2 3 4 5 6 7 8 8 OH 11 12 1 2 3 4 5 6 7 8 9 10 11 12 PRESET 4 FOOT SWITCH ADDITIVE Use SA button to selec
36. lines it needs to be terminated As shipped from the factory a jump jack is connected between pins 1 and 2 placing a termination on the line driver and removing the feed from the ELCO cable To enable this function remove the jump jack from pins 1 and 2 and place it on pins 2 and 3 3 1 4 DIP SWITCH PROGRAM OPTIONS Default ALL OFF The microprocessor program for the MS 812 has several options that are selectable by the user As shipped from the factory all DIP switches are placed in the off position The following chart shows the basic purpose of the switches MULTIPLE SETUP ENABLE OFF Disabled ON Enabled MENU LEVEL SELECT OFF Basic ON Extended BUTTON LOCK Menu ON OFF OFF Disabled ON Enabled MENU ENABLE 4000 OFF Disabled ON Enabled ISO MENU ENABLE 150 4000 OFF Disabled ON Enabled hot used REVERSE TALK LISTEN OFF Normal ON Reverse FACTORY TEST MUST BE IN OFF POSITION Unit will appear to malfunction if ON O Q Example With DIP SW 3 in the ON position certain front panel buttons could be set permanently ON The DIP SW could then be set to OFF but the particular buttons would be locked ON but the user could not change it from the front panel 6 91 Rev 1 1 SETUP amp ADJUSTMENT MS 812 Programmable Master Station 3 1 5 AC VOLTAGE SELECTION The Station is typically shipped configured for the country of installation The internal 110 220 swi
37. next paragraph 4 6 17 for informa tion on BUTTON LOCK ON menu 4 6 17 BUTTON LOCK ON BUTTON LOCK ON DEFAULT None locked MENU TYPE Extended Mode DIP SWITCH ENABLING DIP SW 3 ON Enabled This allows a button to be locked ON When locked ON the circuit remains activated at all times Buttons LOCKED ON cannot be LOCKED OFF and conversely buttons LOCKED OFF cannot be LOCKED ON Refer to the last paragraph 4 6 16 for informa tion on BUTTON LOCK OFF menu 4 6 18 PRESET EXCLUDE 11 90 Rev 1 0 PRESET EXCLUDE DEFAULT None programmed MENU TYPE Extended Mode DIP SWITCH ENABLING None This function excludes a button from being affected by a preset Some applica tions require that a communication channel be considered to be a priority channel i e a telephone line circuit Page 4 18 OPERATION MS 812 Programmable Master Station 4 6 19 SET IFB BUTTONS DEFAULT None programmed SET IFB BUTTONS MENU TYPE Extended Mode DIP SWITCH ENABLING DIP SW 4 ON Enabled Allows the 812 to control one or two external PIC 4000B IFB Electronics This mode allows the selection of where on the pane the IFB buttons appear and how many IFB channels are accessed 2 4 6 8 NOTE IFB buttons are always assigned in pairs replacing one INTERCOM LISTEN TALK pair First choose the starting position of the first two channe s by pressing the desired talk button The button lamps w
38. on the rear panel intended to feed a Clear Com PIC 4000 IFB system A programming option allows the user to assign in groups of two up to eight of the 24 selector buttons to IFB control Assigning buttons to IFB control takes them away from INTERCOM use An internal DIP switch enables the MENU item for this function 150 CLEAR COM 150 4000 The station is designed to connect directly to Clear Com s 150 4000 Station Isolation System A remote station such as a camera can be isolated from its normal intercom channel and talked directly to by the ISOing station A programming option allows the user to assign in groups of two up to sixteen of the 24 selector buttons to ISO control An internal DIP switch enables MENU items for this function 1 8 BRIEF DESCRIPTION OF PROGRAMMING Most operating parameters of the MS 812 are user programmabte making the unit extremely versatile A two line by eight character LCD display helps the user in programming by clearly identifying the menu functions Stepping through the various menu items is done by repeatedly pushing and releasing two SETUP buttons One SETUP button steps the MENU forward and the other backwards Once a menu item is selected the micro processor guides the user by flashing available buttons for a given programmable function The programing Menu is divided into two levels of complexity Access to the second level EXTENDED is enabled by an internal DIP switch NORMAL Basic menu ite
39. sets the amount of Program being sent to Intercom lines 4 3 4 SPEAKER MUTE TRIM LEVEL Figure 4 1 item 15 If the Panel microphone and the Speaker are both enabled at the same time there is the possibility of feedback During this mode the audio level to the speaker can be reduced Muted to prevent this feedback The amount of reduction is set by the SPKR MUTE trim level control 4 3 5 SIDETONE LEVEL TRIM LOCAL Figure 4 1 item 15 Sidetone is the portion of the local headset microphone signal that is also heard in the earphone This effect is desirable as a confidence factor that the microphone is operating The SIDE TONE trim contro adjusts the amount of locally generated sidetone NOTE Side tone can also be generated by an improperly nulled intercom line driver The Local Sidetone Control will have no effect on this source of side tone Refer to section 3 2 2 for sidetone null adjustment of intercom line drivers 11 90 Rev 1 0 OPERATION Clear Com 5 812 Programmable Master Station 4 3 6 BEEP TONE LEVEL TRIM Figure 4 1 item 15 BEEP tones are generated at various times in the operation of the system These tones are only heard in the Speaker and are not affected by the Intercom Volume control The BEEP tone is only affected by the SPEAKER ON OFF button and the BEEP LEVEL trim control Adjust the BEEP LEVEL trim control for desired level 4 3 7 LAMP BRIGHTNESS Figure 4 1 item 15 The overall brightnes
40. that at least have the resistor 5 1 2 DIGITAL 5 VOLTS The 5 volt regulator supplies DC power for the Microprocessor and related components All logic components except for the shift registers that interface to the CMOS switches in the audio circuitry are powered from this supply 5 1 3 DIGITAL 15 VOLTS The CMOS analog switches need to see a control voltage that swings from 1 volt to 14 volts The logic devices are operated from 15 volts to provide this togic swing 5 1 4 LAMP REGULATED SUPPLY The lamps on the front panel are supplied power from a regulator whose reference is set by a front panel trim control The front panel trim control allows the user to the set the lamp brightness depending on ambient lighting conditions The range of this regulated supply is 2 to 5 volts 5 1 5 30 VOLT AUDIO POWER SUPPLY All of the audio circuitry in the MS 812 is powered from a single 30 volt regulated supply This power supply has a variable reference circuit that will reduce the output voltage if the transformer secondary voltage falls This variable reference feature allows the supply to still regulate and produce low noise figures even if the AC line voltage falls Power supply output of 22 to 30 volts are acceptable for the audio circuitry and produce no ill side effects except for a reduction in headroom in the speaker amplifier 11 90 Rev 1 0 Page 5 1 MAINTENANCE MS 812 Programmable Master Station
41. that cable The SA feed to this cable must be enabled using jumper J33 As this line is a bridging bus similar to Clear Com intercom lines it needs to be terminated As shipped from the factory a jump jack is connected between pins 1 and 2 placing a termination on the line driver and removing the feed from the ELCO cable To enable this function remove the jump jack from pins 1 and 2 and place it on pins 2 and 3 2 7 4 DIP SWITCH PROGRAM OPTIONS Default ALL OFF 6 91 Rev 1 1 The microprocessor program for the MS 812 has several options that are selectable by the user As shipped from the factory all DIP switches are placed in the off position The following chart shows the basic purpose of the switches ONDAN MULTIPLE SETUP ENABLE MENU LEVEL SELECT BUTTON LOCK Menu ON OFF MENU ENABLE PIC 4000 ISO MENU ENABLE 150 4000 not used REVERSE TALK LISTEN FACTORY TEST MUST BE IN OFF POSITION Unit will appear to malfunction if ON OFF Disabied OFF Basic OFF Disabled OFF Disabled OFF Disabled OFF Normal ON Enabled ON Extended ON Enabled ON Enabled ON Enabled ON Reverse INSTALLATION MS 812 Programmable Master Station DIP switches 3 5 only affect the availability of the respective menus however the actual function could operate if the particular program option had been set before the DIP switch is placed in the off position Example With DIP SW 3 in the ON p
42. the intercom line For a channel to be ENABLED for BEEP it must have been enabled in the previous CALL IN ENABLE menu If a channel is re enabled in the CALL IN ENABLE menu the BEEP on that channel will default to being off 11 90 Rev 1 0 Page 4 14 OPERATION MS 812 Programmabie Master Station 4 6 6 CALL IN ACTIVATE CALL IN ACTIVATE DEFAULT Disabled on all channels MENU TYPE Sub Menu in Extended Mode DIP SWITCH ENABLING None Causes an incoming CALL signal on an intercom line to automatically turn ON the associated channel s TALK and or LISTEN circuit allowing the caller to control that channel of the 812 4 6 7 CALL IN TIME OUT DEFAULT 20 Seconds MENU TYPE Sub Menu in Extended Mode DIP SWITCH ENABLING None Sets the time that a CALL light continues to flash after the CALL signal is no longer present on the intercom channel Pressing the flashing SA button will step through the different possible time out durations 4 6 8 AUTO CALL OUT AUTO CALL OUT DEFAULT Disabled on all channels MENU TYPE Sub Menu in Extended Mode DIP SWITCH ENABLING None The AUTO CALL OUT function allows sending a CALL signal with either TALK or LISTEN button activation The signal will be continuously sent on the intercom line as long as the TALK or LISTEN circuit to the channel is ON 6 91 Rev 1 1 Page 4 15A OPERATION MS 812 Programmable Master Station 4 6 9 PROGRAM FEED
43. 0 Rev 1 0 Page 2 12 INSTALLATION Clear Com 5 812 Programmable Master Station 2 5 CONNECTION TO IFB PIC 4000 SYSTEM Unless ordered with one of the options listed below the MS 812 is shipped with a blank plate over holes for four XLR connectors The ISO 16 Option provides two XLR 6M IFB connectors for eight channels of IFB and two other XLRs for ISO system connection For each four channels of IFB the unit also needs a 4 CH Line Drive Module installed The following is a description of the options available ISO 16 is an option that provides just the rear panel connectors installed for IFB and ISO operation No additional Line Driver Modules IFB 40 is a four channel IFB and ISO Option that has one additional Line Driver module and the rear panel connectors ISO 16 Option installed for IFB and 150 operation IFB 80 is eight channel IFB and ISO Option that has two additional Line Driver modules and the rear panel connectors 15 16 Option installed for IFB and ISO operation With the above mentioned hardware installed and an external IFB system installed the final implementation of IFB is dependent on software configuration of the unit Refer to Chapter 4 6 19 for information on configuring the software for IFB Once configured the MS 812 will directly control the PIC 4000 IFB system allowing the MS 812 to emulate a MA 4 and AX 4 installation PROGRAM 4 TALENT 1 4 PRODUCER 4000 22
44. 20 150043 47UF 50V MONOLYTHIC 150002 1UF 50V NP ELECT 150073 1UF 50V 10 150044 4 7UF 35V TANT 150087 4 7UF 50V ELECT 150072 10UF 25V NP 150064 10UF 50V ELECT 150088 10UF 50V NP ELECT 150010 22UF 16V ELECT 150100 47UF 16V ELECT 150081 47UF 35V ELECT 150020 220UF 25V ELECT 150021 220UF 35V ELECT 150092 1000UF 35V ELECT 150135 2200UF 50V ELECT 150126 4700UF 25V ELECT 4 91 Rev 1 1 R141 R1R2 R13 R81 R50 R57 R80 R82 R85 R90 103 R104 R105 R107 R83 R84 REF DESIGNATORS C20 C21 C80 C89 C36 C65 C94 C97 C30 C40 C41 C48 C49 C57 C66 C79 C44 C53 C26 C29 C67 C68 C156 C157 C33 C59 C23 C24 C25 C84 C62 C17 C34 C55 C35 C144 C145 C147 C154 C9 C4 C11 C13 C14 C15 C16 C19 C22 C43 C52 C56 C58 C74 C75 C77 C78 C83 C85 C87 C108 C111 C135 C160 C161 C166 C8 C109 C100 C101 C32 C54 C63 C64 C12 C73 C91 C69 C70 C31 C92 C136 C138 C139 C142 C76 C143 C147 C27 C42 C50 C51 C71 C72 C28 C38 C39 C46 C47 C61 C158 C159 C93 C104 C105 C106 C107 C162 C10 C82 C60 C137 C140 C141 C158 C88 C7 C37 C45 C98 C99 C81 C90 C95 C96 C5 C18 C163 C164 C167 C168 C155 C110 C6 C165 C86 C1 Page 6 10 BILL OF MATERIALS MS 812 Programmable Master Station DIODES CC P N 480026 480001 480000 480005 TRANSISTORS CC P N 480006 480069 480050 DESCRIPTION 1N957B ZENER DIODE 6 8V 5 4W 1N4001 RECTIFIER DIODE 1N4148 SIGNAL DIODE 1N5401 RECT DIODE 3
45. 5 483mm x 89mm x 235mm 12 0 Ibs 5 5 Kg WORKING TEMPERATURE RANGE 32 122 F 0 50 C OdBv is referenced to 0 775 5 RMS Specifications subject to change without notice All marked circuits appear on the 56 ELCO EDAC Multi Pin connectors 11 90 Rev 1 0 INSTALLATION Clear Com MS 812 Programmable Master Station SECTION 2 INSTALLATION OF THE MS 812 PROGRAMMABLE MASTER INTERCOM STATION Before You Begin Upon receiving the equipment inspect the shipping boxes for shipping damage Report all shipping damage to the carrier Clear Com is not responsible for damage caused in shipping Count and verify receiving all items on the packing list Do not discard packing materials until all items are found Clear Com recommends that your retain the shipping material until after the system is completely installed and working in case some item must be returned to Clear Com for warranty service 2 1 INSTALLATION OVERVIEW The MS 812 is a very versatile intercom station installations can vary widely depending on what features are used The following sections will deal with each feature or group of connectors on the rear panel as they are independent functions The overall intercom system should be planned prior to installing a particular station The following steps should be followed before installing any given station Create block diagram the entire system Plan intercom line termination locations Ident
46. 812 Family Products MS 812 Special Features Bries Description of Programming Technical Specifications B O O S O Q rS h INSTALLATION Installation Overview Cable Considerations Portable Installation Cable Permanent Installation Cable Cable Installation Effects on Cross Talk System Power Considerations Connection of Intercom Lines Standard Installation XLR Rear Panel ELCO EDAC Multi Pair Cable Instatlation CP 56 Tuchel Multi Pair Installation CP 30 Miscellaneous Audio Connectors Program Input 1 SA Output External Speaker Connection MA 4 Link Connection DB 15 Auxiliary Audio Connectors Program Input 2 HOT MIC Output Stereo Headset Connection DB 9 Logic Connector Connection to IFB PIC 4000 System Connection to 150 4000 System Internal Options Optionsi Program 1 Feed to Speaker Optional Program Feed to LEFT EAR Optional GLOBAL SA FEED to ELCO EDAC DIP Switch Program Options Connect MS 812 Intercom to A C Power TABLE OF CONTENTS MS 812 Programmable Master Station SECTION3 SETUP AND ADJUSTMENT Internal Options Optional Program 1 Feed to Speaker Optional Program Feed to LEFT EAR Optional Global SA Feed to ELCO EDAC DIP Switch Program Options AC Voltage Selection Internal Adjustments Panel Microphone Gain Trim Intercom Line Null SIDETONE Adjustments SECTION4 OPERATION 4 1 LCD Display 4 2 Description of Front
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48. A 100PIV DESCRIPTION 2N2222 TRANSISTOR 2N5639 N CHANNEL JFET MPS A55 TRANSISTOR INTEGRATED CIRCUITS CC P N 480076 480107 480165 480090 480117 480132 480157 480120 480142 480083 480092 480167 480166 480024 480012 480070 480134 480164 480168 480105 480175 MISCELLANY 230001 450007 470022 510078 560018 710233 Gz 156 pe bada 4 91 Rev 1 1 DESCRIPTION 4049B CMOS HEX INVERT BUFFER 4094 CMOS 8 BIT SHIFT REGISTER 4514 CMOS 4 16 LINE DECODER 4584B CMOS HEX SCHMITT TRIG 6264 CMOS 8K X 8 STATIC RAM 68HC11AOFN MCU 52 PIN PLCC 74HC00 QUAD NAND 74HC138 CMOS 3 TO 8 LINE DECODER 74HC373 CMOS TRISTATE OCTAL LATCH 7805T 5 VOLT REGULATOR T0220 PKG DG211CJ QUAD CMOS ANALOG SWITCH LM317T 1 5A ADJ VR TO 220 LM339N QUAD COMPARATOR LM340 15 15V REGULATOR LM384 POWER OP AMP NE5532 DUAL LO NOISE OP AMP TL7705AP VOLT SUPERVISOR RESET UCN5821A 8 BIT SHIFT REG DRIVERS SSM 2024P QUAD VCA X2404 512B XICOR SERIAL NVM LM 833N DUAL OP AMP 8 PIN DIP CRYSTAL 3 57545 MHZ HC18 U DPDT 12V RELAY ITT RZ 12W C 5K TRIMPOT H MTG 8 POS DIP SWITCH 600 600 TRANSFORMER EPROM ASSEMBLY Page 6 11 REF DESIGNATORS D9 010 011 015 016 028 037 D38 044 045 012 013 014 017 018 019 020 029 036 039 043 01 08 DESIGNATORS Q1 Q3 Q5 Q6 Q4 REF DESIGNATORS 22 26 IC23 IC3 66 IC1 IC7 IC8 IC4 VR1 VR5 IC29 IC30 IC31 VR3 VR2 IC25 1024 VR4 IC28 1 14 1 17 IC1
49. AIN Both program inputs are inentical in gain structure Measurements are with front panel PROGRAM volume and PRG FEED TRIM fully clockwise If J32 is installed Program 1 should show at Program 2 5 output also at the same gain PROGRAM INPUT 1 Pins 2 amp 3 of XLR z 10 dBv ballanced Internal Program Bus 1 IC14 PIN 7 0 0 dBv PROGRAM INPUT 2 Pins 6 amp 13 of DB15 Internal Program Bus 1 014 PIN 1 10 dBv ballanced 0 0 dBv INTERNAL PRG BUS to INTERCOM LINE GAIN PRG BUS IC14 Pin 7 z 0 0 dBv Terminated Intercom Lines 15 dBv INTERCOM LINES to LISTEN BUS LINE GAIN All Listen TRIM controls on the front panel set fully clockwise The NULL control for the channel under test should be set fully clockwise Terminated Intercom and ISO Lines 10 dBv Internal LISTEN BUS 17 Pin 7 0 0 dBv INTERNAL LISTEN BUS to SPEAKER GAIN Front Panel INTERCOM Volume control and MUTE LEVEL conrols set to fully clockwise The NULL contro for the channel under test should be set fully clockwise Internal LISTEN BUS IC 17 Pin 7 10 0 Speaker Terminals 20 dBv INTERNAL LISTEN BUS to HEADSET GAIN Front Panel INTERCOM Volume control set to fully clockwise The NULL control for the channel under test should be set fully clockwise Internal LISTEN BUS 17 Pin 7 10 0 dBv Headset Output 18 dBv 5 6 MAINTENANCE MS 812 Programmable Master Station 5 4 TROUB
50. Belt packs will now be powered on Channel 3 from the MS 200C internal power supply In this example the source of termination for Channels 1 and 2 could be either from the MS 812 or the MS 200C 11 90 Rev 1 0 Page 2 5 eR RE 9 8 0 4444 984444494440 9 009 Qi ai 1000 10104 11010 2 4 Typical ELCO System Connection vs 591975 1138 2 5 o 5 a 5 2 n N x 4 e 8 5 lt o 11 90 Rev 1 0 INSTALLATION MS 812 Programmable Master Station 2 2 2 ELCO EDAC MULTI PAIR CABLE INSTALLATION CP 56 11 90 Rev 1 0 Through the use of the ELCO series 8016 56 pin cable connector easy connection between multiple MS 812s and other system components can be quickly realized The brand name EDAC is a second source ELCO products The IP 1200 System interface Panel is designed specifically to mate with the MS 812 using this cable format A STAND ALONE MS 812 SYSTEM An 12 channel intercom system with many MS 812s could be easily configured using just the 16 pair ELCO cables Daisy chaining is quickly accomplished with the loop through connectors on the 56 Termination would need to be placed in a blank connector at one of the end stations in the daisy chain path An ELCO connector with solder terminals could be used to construct the 12 termina
51. CAL RELAY 1 LOCAL RELAY 2 GLOBAL RELAY 1 1 2 3 4 5 B 8 10 11 12 GLOBAL RELAY 2 EET 3 4 5 6 7 8 8 10 11 12 BUTTON FUNCTIONS PRIVATE TALK PRIVATE LISTEN LISTEN WITH TALK 1 2 3 4 5 6 7 9 101 12 5 6 7 8 8 0 11 12 LATCH DISABLE 1 2 3 4 5 6 7 B 9 0 11 12 Note Button Lock ON amp OFF are interactive button is locked ON it becomes not available to be locked OFF and visa versa SUR IFB ISO IFB BUTTONS ISO BUTTONS ISO STATION ISO 1st CH 4 Channel 81 15 Use SA button to Use SA button to select select Clear Com form F0015 1 5 812 PROGRAMMING WORKSHEET Intercom Systems JOB SHOW STATION STATION SETUP NAME SETUP INSTRUCTIONS Fill in PRESET INTERCOM IFB 4 RELAY button designations INSTRUCTIONS Check off button s to be included in function Bold functions are Basic Menu functions _ Non shaded buttons are always available in the functions ES Dark shaded buttons are never available in function 2 Light shaded button availibility changes based on other programmed functions PRESET FOOTSWITCH PRESET 1 PRESET 2 PRESET 3 5 6 7 8 9 10 11 12 5 6 7 8 9 0 11 12 3 4 5 6 7 B 9 10 11 12 FOOT SWITCH 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 8 10 11 12 CALL IN ACTIVATE 9 om 5 6 7 9 0 11 12 CALL IN TIME Amount of time button continues to flash after
52. CH 1 2 IC12 LM339N QUAD COMPARATOR 9 NE5532 DUAL LO NOISE OP AMP IC5 IC6 1 7 RC4559NB OP AMP 4 DESIGNATORS C10 C20 C30 C40 C9 C19 C29 C39 C3 C13 C23 C33 C6 C16 C26 C36 C43 C44 C45 C46 C7 C8 C17 C18 C27 C28 C37 C38 C12 C22 C32 C42 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C11 C21 C31 C41 C5 C15 C25 C35 C4 C14 C24 C34 C1 C2 C60 REF DESIGNATORS D1 D2 D3 D4 D5 D7 06 REF DESIGNATORS Q2 Q4 06 Q8 Q9 Q1 Q3 Q5 Q7 Page 6 4 BILL OF MATERIALS MS 812 Programmable Master Station This Page Left Intentionally Blank 10 90 Rev 0 1 BILL OF MATERIALS MS 812 Programmable Master Station oie D us 2014 ASSY Q Q 9 0035 39108 NO 11 15 1 OEMS ONY POMS HOJ 5 W140 Ao90000o0o900000 of k d uU zig SW 11083 V4 824 91071 v 1 130 335 1894355 001 001024 9 2 0201 50068 30 45 GNNOY 006 96 4 212082 131205 822012 900 134205 TNO Nid 4 5214 1 95 2 71082 235 395 930105 NO 71 15 Figure 6 2 Front Panel PCB Assembly Drawing Page 6 6 10 90 Rev 0 1 BILL OF MATERIALS
53. Clear Com Intercom Systems 945 Camelia Street Berkeley California 94710 1484 Telephone 415 527 6666 Telefax 415 527 6699 Page i 2 TABLE OF CONTENTS Clear Com MS 812 Programmable Main Station Shipping Manufacturer for Repair or Adjustment All shipments of Clear Com equipment must be prepaid via United Parcel Service or the best available shipper The equipment should be shipped in the original packing container however if the original con tainer is not available use a suitable container that is rigid and of ade quate size If a substitute container is used the equipment should be wrapped in paper and surrounded with at least four inches of excelsior or similar shock absorbing material All shipments should be directed to the attention of the Customer Service Department and must include the Return Authorization Number Upon completion of repairs equipment will be returned collect via United Parcel Service or other specified shipper SOFTWARE LICENSE AGREEMENT Clear Com Systems Clear Com provides this software firmware for the MS 812 and licenses its use You assume responsibility for the selection of the firmware to achieve your intended results and for the instaltation and use of and results obtained from the program Firmware in this agreement refers to the operating software stored in ROMs through the MS 812 MAIN STATION You may 1 Use the program only on a single machine 2 Transfer the fir
54. Clear Com is a closed circuit intercom system that consistently provides high clarity communication in high noise and low noise environments A basic system consists of a single or multi channel power supply or main station connected to various single or multi channel remote stations Clear Com manufactures a wide variety of both portable and fixed installation units All are compatible with each other Clear Com can also interface with other communication systems Clear Com stations are interconnected with two conductor shielded microphone cable using 3 pin XLR connectors One wire carries the DC power 28 30 volts from a main station or power supply to all remote stations and the other wire carries audio information The shield acts as a common ground One termination per channel is needed throughout the intercom network and is usually located in the main station or power supply Clear Com is a distributed amplifier system each main and remote station houses its own mic preamplifier for headset or speaker and signaling circuitry The Automatic Headset Detection circuit shuts off a station s mic pre amp when the headset is disconnected so background noise on the line is not increased by an unused yet on line station Low impedance mic input lines 200 Ohms and specially designed circuitry make Clear Com channels virtually immune to RFI and dimmer noise Clear Com main stations power supplies and certain remote stations each have
55. IVATE LISTEN PRIVATE LISTEN DEFAULT Disabled on all channels MENU TYPE Extended Mode DIP SWITCH ENABLING None When an Intercom ISO or SA button is programmed for PRIVATE LISTEN activation of that button will momentarily disable other LISTEN paths while the button is active 4 6 14 LISTEN WITH TALK LISTEN w TALK DEFAULT Disabled on all channels MENU TYPE Extended Mode DIP SWITCH ENABLING None Causes the intercom channel LISTEN circuit to be turned ON whenever the associated TALK button is ON This function provides Single button activation of an intercom channel 4 6 15 LATCH DISABLE DEFAULT IFB and SA functions MENU TYPE Extended Mode DIP SWITCH ENABLING None This allows the LATCH function to be disabled so the button will only work momentarily only as long as the button is held 11 90 Rev 1 0 Page 4 17 OPERATION Clear Com MS 812 Programmable Master Station 4 6 16 BUTTON LOCK OFF BUTTON LOCK OFF DEFAULT None locked OFF MENU TYPE Extended Mode DIP SWITCH ENABLING DIP SW 3 ON Enabled This allows a button to be locked OFF This function only disables the physical action of the particular button The particular function that the button is related to is still operational The function normally controlled by the LOCKED OFF button could be activated by a PRESET button Buttons LOCKED ON cannot be LOCKED OFF and conversely buttons LOCKED OFF cannot be LOCKED ON Refer to the
56. KER ON BUTTON Figure 4 1 item 3 Without a headset plugged into the unit the Speaker is always on and cannot be shut off An illuminated button indicates that the speaker is on The headset earphone is always on When a headset is initially plugged into the station the speaker is automatically turned off Unplugging a headset automatically enables the speaker When a HEADSET is connected to MS 812 the SPEAKER ON button enables the SPEAKER to be turned ON and OFF 11 90 Rev 1 0 OPERATION MS 812 Programmable Master Station 4 2 4 PRESET BUTTONS Figure 4 1 item 6 Four special function buttons called PRESETs can be programmed by the user to activate any combination of the 24 selector buttons and the SA button Refer to section 4 6 1 for instructions on programming these buttons If a PRESET button is programmed to particular buttons when pressed those functions will be activated just as if they were pressed all at the same time The logical action of the PRESET buttons is selectable in the programming mode The choice of modes is the same for all preset buttons Refer to Section 4 6 2 INTERLOCK If a preset is active and another preset button is pressed the second preset functions will replace the first if the second button press is momentary in duration the original active preset will return when the second one is released If the second preset is latching releasing it will return the station to no
57. LAY 1 GLOBAL RELAY 1 7 B 9 10 1 12 FUNCTIONS PRIVATE TALK PRIVATE LISTEN 123 4 5 6 7 8 9 10 12 LATCH DISABLE Note Button Lock ON amp OFF are interactive If a button is locked ON it becomes not available to be locked OFF and visa versa IFB ISO BUTTONS ISO BUTTONS ISO STATION ISO 1st CH Station 0 6 Channel 1 15 Use SA button to Use SA button to select select Clear Com form F0015 1 ij 5 812 PROGRAMMING WORKSHEET JOB SHOW STATION NAME STATION SETUP NAME SETUP INSTRUCTIONS Fill in PRESET INTERCOM IFB 504 RELAY bunor ON INSTRUCTIONS Check off button s to be included in function Bold functions are Basic Menu functions Non shaded buttons are always available in the functions ES Dark shaded buttons are never available in function 51 Light shaded button availibility changes based on other programmed functions PRESET FOOTSWITCH PRESET 1 PRESET 2 PRESET 3 7 8 9 10 11 12 E 8 9 10 12 FOOT SWITCH spp sp ELE 9 10 1 12 9 10 11 12 CALL IN TIME Amount of time button continues to flash after incoming call signa is removed 5s 20s 1m 15m 30m Use SA button to select GlearCom 5 812 PROGRAMMING WORKSHEET intercom LOCAL PROGRAM INTERRUPT 5 PROGRAM EHTEEEHEEEE 12 3 4 7 8 9 30 11 12 1 2 3 4 5 6 7 8 9 140 n 12 z RELAYS LO
58. LE SYMPTOMS POSSIBLE CAUSES amp SOLUTIONS The following section gives some of the possible problems that may occur in operation of the MS 812 No or dim push button LIGHTS Check the setting of the LAMP BRIGHTNESS trim control One particular LIGHT does come on bright or dim Replace lamp No or low BEEP tone in SPEAKER Check setting of BEEP TONE trim level No BEEP tones in HEADPHONES Normal condition BEEP TONE when a selector button is pressed The button has not been programmed to any function The LINE DRIVER MODULE that supports the button is not present No or low SPEAKER volume Check setting of MUTE LEVEL trim control Check setting of INTERCOM volume control Check SPEAKER ON button Low SIDETONE volume in HEADPHONES Check setting of SIDETONE LEVEL control Excessive SIDETONE or feedback when in TALK mode Improper termination on intercom line Adjust NULL control on LINE DRIVER MODULE If the NULL control of an intercom line driver was adjusted when some local SIDETONE was present Adjustment of the NULL controls on all line drivers must be done with no LOCAL sidetone present The LOCAL sidetone generated internally will be out of phase with the sidetone generated by a poor NULL The mixing of the two will produce a faulse null point Low or dissimilar VOLUME on INTERCOM channels Improper termination Excessive interchannel CROSSTALK Improper system wiring 11 90
59. LL sense circuits will trigger on a DC voltage greater than 3 volts CALL send circuits will produce at least 10 volts DC CALL send circuits are current sources also allowing them to have a high audio impedance The Clear Com line receive circuit forms a hybrid circuit attempting to null the TALK signal out of the LISTEN signal The hybrid is a bridge circuit that depends on a known impedance of the intercom line The side tone null adjustment adjust this bridge within a range Multiple terminations and no termination are out of range of this circuit 5 3 2 USE OF VCAs 11 90 Rev 1 0 The MS 812 utilizes VCA Voltage Controlled Amplifier circuits for gain control of most of the audio signals that are controlled from front panel controls The use of VCAs allows the control element to be located in an electrically noisy environment The devices used in the MS 812 are voltage controlled current multipliers Being that their output is current all of these devices need a current to voltage conversion which is accomplished with the OP amp that follows them Because their outputs are current several of these devices sum into the same input node of an OP amp These devices may also be placed in series acting like two pots in series The control voltages of two sections can be supplied from a common source producing a tracking control of two separate audio channels There are examples of all of these modes in the MS 812
60. PTION OF PROGRAMMING MENUS The following paragraphs describe each menu function in detail All NORMAL MENU items are also in the EXTENDED MODE this discussion no distinction is made for those items found in sub menus For a better understanding of the menu organization refer to the menu trees in figure 4 2 and figure 4 3 on pages 4 10 and 4 11 11 90 Rev 1 0 4 12 OPERATION Clear Com MS 812 Programmable Master Station 4 6 1 PRESET ASSIGNMENT PRESET 1 DEFAULT No buttons programmed to PRESETs MENU TYPE Normal or Sub Menu in Extended Mode DIP SWITCH ENABLING None Allows assignment of any combination of the 24 selector buttons and the SA button to be assigned to and subsequently activated by any of the four PRESET buttons Use NEXT and BACK A to select the PRESET button to be programmed Relays are assigned to PRESET buttons with their own menus see section 4 6 11 Other menus that affect the operation of PRESETs are as follows PRESET OPERATION MODE see section 4 6 2 PRESET EXCLUDE see section 4 6 18 4 6 2 PRESET OPERATION MODE PRESETS PRESETS INTERLOC ADDITIVE 11 90 Rev 1 0 DEFAULT INTERLOC MENU TYPE Extended Mode in a Sub Menu DIP SWITCH ENABLING None This menu provides selection of PRESET operation modes Pressing and releasing the flashing SA button will toggle from one mode to the other INTERLOCK MODE This mode simulates a mechanically interlocking series of sw
61. R145 R146 R19 R209 R210 R36 R5 R12 R118 R120 R59 R66 R74 R111 R115 R123 R128 R7 R9 R150 R151 R86 H108 R17 R22 R32 R35 R94 R99 R100 R101 R102 R195 R207 R106 R87 R3 R147 R183 R188 R26 R37 R23 R24 R29 R61 R62 R67 R68 R77 R78 R113 R124 R125 R126 R127 R129 R130 R139 R18 R71 R6 R91 R41 R60 R69 R79 R114 R131 R44 R4 R14 R15 R16 R20 R21 R28 R31 R33 R34 R43 R96 R97 R98 R93 R109 R47 R63 R70 R116 R117 R119 R138 R142 R143 R148 R160 R177 R185 R187 R189 R191 R192 R193 R194 R110 R121 R122 R27 R38 R45 R46 R30 R136 R112 R132 R58 R64 R65 R95 R75 R73 R72 R76 R137 R149 R178 R186 R156 R157 R158 R159 R184 R92 R89 R133 R144 R10 R11 R179 R181 R39 R40 R180 R182 R88 R25 R42 BILL OF MATERIALS Clear Com MS 812 Programmable Master Station MISCELLANOUS RESISTORS 410159 2 OHMS 1W 5 410168 2 4 OHM 5W WW 410108 220 OHMS 1 2W 410144 8 25K OHMS 1 4W 1 410086 20 0K OHMS 1 4W 1 410105 47 5K OHMS 1 4W 1 CAPACITORS CC P N DESCRIPTION 150098 22PF 50V 10 150026 39PF DISC 5 150041 47PF DISC 10 150006 100PF DISC 10 150007 200PF DISC 10 150074 220PF MONO 10 150014 470PF DISC 10 150102 470PF 50V 20 150094 680PF 50V 5 150101 820PF 50V 5 NPO 150052 001UF 30V DISC 1096 150108 0022UF 50V MONO 1095 150114 0047UF 50V MYLAR 596 150012 01UF 30V DISC 150112 100V 20 150029 01UF 1 4 DISC 150008 022UF MYLAR 1096 150131 047UF 100V 5 150003 22UF 100V MYLAR
62. Rev 1 0 MAINTENANCE MS 812 Programmable Master Station Excessive background NOISE A microphone latched on somewhere in the system An unterminated line is very noisy An unterminated line other than the one being listened to may oscillate and cause general system noise HUM in SPEAKER or HEADPHONES Improper system grounding Chassis ground cannot be connected to intercom common ground See section 5 1 1 The 10 Ohm resistor R190 between intercom ground and chassis ground is open See section 5 1 1 No PROGRAM volume in HEADPHONES Install 132 and or 434 LOSS of PROGRAMMED FUNCTIONS and SETUPs Station has been RESET either in the particular SETUP or globally Reprogram the station Cannot Send CALL Make sure that the TALK selector button is not programmed for IFB or ISO Swap or replace the LINE DRIVER MODULE Cannot Receive CALL Make sure that CALL Receive is enabled for the channel Make sure that the patricular LISTEN button is not programmed for IFB or ISO Swap or replace the LINE DRIVER MODULE No TALK Audio on intercom line Make sure that the TALK selector button is not programmed for IFB or ISO Swap or replace the LINE DRIVER MODULE Low or uneven LISTEN volume on INTERCOM channels Check LISTEN LEVEL trim controls No LISTEN Audio on intercom line Make sure that the LISTEN selector button is not programmed for IFB or ISO Swap or replac
63. S 22K OHMS 33K OHMS 43K OHMS 100K OHMS 100K OHMS 150K OHMS 220K OHMS 470K OHMS 680K OHMS DESCRIPTION 8 25K OHMS 20 0K OHMS 47 5K OHMS DESCRIPTION 5K TRIMPOT MS 812 AMP MODULE BOM REF DESIGNATORS R1 R2 R92 R93 R94 R8 R24 R40 R56 R16 R32 R48 R64 R9 R25 R41 R57 R75 R28 R12 R44 R60 R86 R88 R13 R29 R45 R61 R77 R87 R76 R15 R31 R47 R63 R89 R90 R91 R14 R30 R46 R62 R18 R34 R50 R66 R17 R33 R49 R65 R67 R69 R71 R73 R68 R70 R72 R74 R10 R26 R42 R58 REF DESIGNATORS R3 R19 R35 R51 R4 R5 R11 R20 R21 R27 R36 R37 R43 R52 R53 R59 R78 R79 R80 R81 R82 R83 R84 R85 R6 R7 R22 R23 R38 R39 R54 R55 REF DESIGNATORS P1 P2 P3 P4 BILL OF MATERIALS MS 812 Programmable Master Station CAPACITORS CC P N 150026 150007 150101 150108 150008 150111 150112 150133 150002 150087 150011 150020 DIODES CC P N 480001 480000 TRANSISTORS CC P N 480006 480008 DESCRIPTION 39PF DISC 5 200PF DISC 10 820PF 50V 5 0022UF 50V 10 022UF POLY 10 047UF 50V 10 100V MONO 20 22UF 50V MONO 1UF NP 50V ELECT 4 7UF NP 50V ELECT 100UF 35V ELECTR 220UF 25V ELECTR DESCRIPTION 1N4001 RECTIFIER DIODE 1N4148 SIGNAL DIODE DESCRIPTION 2N2222 TRANSISTOR MPS A63 TRANSISTOR INTEGRATED CIRCUITS CC P N 480107 480092 480166 480070 480056 10 90 Rev 0 1 DESCRIPTION REF DESIGNATORS 4094B 8 BIT CMOS SHIFT REGISTER 10 DG11CJ QUAD CMOS ANALOG SWIT
64. SYSTEM POWER CONSIDERATIONS 11 90 Rev 1 0 The MS 812 is self powered and does not require power from the intercom line Two or more MS 812s may talk to each other without the need for an external power source The MS 812 does not provide any power for external devices therefore if remote Stations that require external power are to be used with a MS 812 an external power source must be provided Clear Com provides a variety of Power Supplies specially designed for use with Clear Com equipment These power supplies have special characteristics and protection that is ideal for intercom service Other sources of 30 VDC may be used but Clear Com only guarantees the proper operation of the equipment with Clear Com power supplies are used Page 2 3 3NOHd3 31 SV33AVO 4 4 430 28 v00v 5W EIE Ed 1738 All ecco 8 8 11 2 4 S39V3331NI Figure 2 2 Typical XLR System Connection 330 Waal 9 o 2 8 N T O 8 5 lt EN lt o 11 90 Rev 1 0 INSTALLATION MS 812 Programmable Master Station 2 2 CONNECTION OF INTERCOM LINES Section 2 2 only deals with intercom system connection through the use of the three optional connector panels available Other
65. T V button for one second brings up a special menu allowing the user to select one of the four SETUPS saved memory The LCD display will respond as follows Select Setup The four PRESET buttons will now flash except for the one representing the current SETUP number which will be on steady Pressing any of the four buttons will select that SETUP and immediately exit the mode Setup selection can be disabled via an internal DIP switch refer to page 4 10 11 90 Rev 1 0 Page 4 6 OPERATION Clear Com MS 812 Programmable Master Station 4 2 8 2 BUTTON CHECK FUNCTION BACK 4 in normal operation the BACK A button is used to enable the BUTTON CHECK function Pressing and holding the BACK A key for one second will place the system in BUTTON CHECK mode The LCD dis play will respond Button Check All illuminated buttons will now flash indicating that they are available for inquiry about their status Pressing any one of the buttons will cause the LCD display to indicate Button Type Status and then list all functions that button is programmed to To exit a particular button check inquiry before it is finished press the button again Button Types INTERCOM Status Types No Audio Card No ISO System ISO Preset Empty PRESET RLY ONLY If the RESET button is pressed while in the BUTTON CHECK mode the display will present special information about the unit The display will sequence between three di
66. an auxiliary program input with its own volume control which allows an external audio source to be fed to the intercom system Visual Signal Circuitry CALL Lights a standard feature on most main and remote stations allows the user to attract the attention of operators who have removed their headsets Depending upon the type of main and remote stations selected and assuming that enough DC power is available a maximum number of remote stations from 13 all speaker stations to 100 all headset stations can be distributed along a mile of wire Remote stations bridge the intercom line at a very high impedance gt 15 KOhms and place a minimum load on the line The audio levei always remains constant and does not fluctuate as stations leave and join the network The 28 30 volts DC provided by main stations and power supply units enable remote stations to operate with minimal current 25 mA quiescent for headset stations 50 mA quiescent for speaker stations while generating extremely loud listen volumes greater than 110 dB SPL using Clear Com Headsets The higher voltage and low current keep voltage losses to an absolute minimum in long lines If the supply voltage drops due to the addition of great length of cable or many more stations Clear Com equipment will continue operating with less than 12 volts available 11 90 Rev 1 0 DESCRIPTION MS 812 Programmable Master Station 1 1 MS 812 OVERALL DESCRIPTION The
67. arranties so the above exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from State to State or Province to Province Limitation of Remedies 11 90 Rev 0 2 In no event will Clear Com be liable to you for any lost profits lost savings or other incidental or consequential damages arising from use of or inability to use any program even if Clear Com or an authorized Clear Com representative has been advised of the possibility of such damages or for any claim by any other party Some States and Provinces do not allow the limitation or exclusion of liability for incidental or consequential damages so the above limitation or exclusion may not apply to you 5 liability to you for actual damages for any cause whatsoever and regardless of the form of the action will be limited to the money paid for the firmware that caused the damages or that is the subject matter of or is directly related to the cause of the action Any attempt to rent lease or sublicense the program or except as expressly provided in this Agreement to transfer any the rights duties or obligations under this Agreement is void The Agreement will be construed under the laws of the State of California except for that body of laws dealing with the conflict of laws any provision of this Agreement shall be held by a court of competent jurisdiction to be contrary to l
68. aw that provision will be enforced to the maximum extent permissible and the remaining provisions of the Agreement shall remain in full force and effect TABLE OF CONTENTS Clear Com MS 812 Programmable Main Station NOTICE ABOUT SPECIFICATIONS Performance specifications included in this manual are design center specifications and are included for customer guidance and to facilitate system installation Actual operating performance may vary BEFORE YOU BEGIN 11 90 Rev 0 2 To get the most out of the MS 812 Main Station read this manual carefully It will answer questions you might have about the operation and service of the components in the system Included is a Troubleshooting Section that provides causes and possible solutions to problems you might have with system and component operation Clear Com s Customer Service Department is available to answer questions not covered in this manual It is assumed you are familiar with the operation of basic intercom systems Page i 5 TABLE OF CONTENTS MS 812 Programmable Station SECTION 1 ee o SECTION 2 2 1 2 1 1 2 1 2 2 1 3 2 1 4 2 1 5 2 2 2 2 1 2 2 2 2 2 3 2 3 2 3 1 2 3 2 2 3 3 2 3 4 2 3 5 11 90 Rev 0 2 DESCRIPTION MS 812 Overall Description Front Panel Description Rear Panel Description Internal Options and Adjustments MS 812 Possible Configurations Description of MS
69. des quick access to the menu items that are most used ENTER PGM MODE 3 PRESET Select Keys for PRESET 1 PRESET Select Keys for PRESET 2 PRESET Select Keys for PRESET 3 PRESET Select Keys for PRESET 4 ENABLE CALL IN for Intercom Channels ALL IN BEEP Audible BEEP with CALL IN PROGRAM FEED PROGRAM FEEDS PROGRAM INTERRUPT Enable PROGRAM INTERRUPTS Figure 4 2 Normal Menu EXTENDED MENU To support very sophisticated use of the MS 812 an extended version of the programming menu is provided In the extended menu some of the subjects have been grouped into sub menus Some of the menu items that support special features of the MS 812 can be turned off by internal DIP switches so that these menu items will not be displayed if the feature is not used The DIP switches only affect the availability of the menus but do not affect the operation of the station The following is description of the DIP switches 1 MULTIPLE SETUP MENU ENABLE This DIP switch only enables the access of the muitiple SETUP menu 2 EXTENDED MENU ENABLE 3 BUTTON LOCK ON OFF MENU ENABLE 4 IFB BUTTON ASSIGNMENT MENU ENABLE 5 ISO BUTTON ASSIGNMENT MENU ENABLE 11 90 Rev 1 0 Page 4 10 OPERATION Clear Com MS 812 Programmable Master Station EXTENDED MENU ENTER PGM MODE gt Submenu PRESET 1 PRESET 2 3 PRESETS Operation 11 Sig Submenu ENABLE CALL IN
70. e pins on J24 for Intercom 9 12 or J25 for IFB A these options can be implemented Pins 6B 7B 8B and 2C also have a dual purpose The header for these pins is intended to plug into 25 or J26 See Figure 2 14 on Page 2 16 for location of these headers For more information refer to the schematic diagram of the Tuchel option in Chapter 7 INT 1 4 J22 Figure 2 7 Tuchet Option Wiring Diagram 11 90 Rev 1 0 Page 2 9 9 5 o 5 2 2 g 2 5 o 5 2 lt lt o Figure 2 8 Typical Tuchel System Connection 11 90 Rev 1 0 INSTALLATION Clear Com MS 812 Programmable Master Station 2 3 MISCELLANEOUS AUDIO CONNECTIONS There are several other connectors on the rear panel Each of these connectors have special purpose 2 3 1 PROGRAM INPUT 1 The female XLR marked PGM 1 is a balanced program input that can be fed to the intercom lines with optional interrupt An internal jumper J32 also allows this program input to feed the speaker and headphones through the front panel PROGRAM control The input impedance is 10 K ohms balanced PGM 1 Pinout Pin 1 Ground Pin 2 Program Input High Pin 3 Program Input Low 2 3 2 SA OUTPUT The male XLR marked SA is the local Stage Announce output for the station This output is transformer isolated The output level is 8 dBv at 600 ohms SA Pinout Pin 1 Ground Pin 2 SA Output High Pin 3
71. e the LINE DRIVER MODULE 11 90 Rev 1 0 Page 5 8 BILL OF MATERIALS MS 812 Programmable Master Station SECTION 6 BLOCK DIAGRAMS AND ASSEMBLY DRAWINGS 6 1 ASSEMBLY 720095 MS 812 CHASSIS PARTS MISCELLANY 500089 3 INCH ROUND SPEAKER CTS 3A2479 500090 PRIMO GOOSENECK MICROPHONE EM4544 500096 FOAM WINDSCREEN FOR PRIMO MIC WS 31 730100 34 POSITION RIBBON CABLE W DUAL ROW IDC 730101 16 POSITION RIBBON CABLE WITH DUAL ROW IDC 730074 DB 15 TO HEADER RIBBON CABLE ASSEMBLY 210232 POWER ENTRY MODULE WITH SWITCH AND FILTER 560030 POWER TRANSFORMER 12VDC 6A 5VDC 4A DMT812A05 250477 LEGEND TRANSPARENCY FOR 720 KEY MS 812 10 90 Rev 0 1 Page 6 1 BILL OF MATERIALS MS 812 Programmable Master Station 10 90 Rev 0 1 170140 PCB FAB MODULE 5 812 2 710229 ASSY INSTALL THUMBWHEEL P N 240062 AS SHOWN Figure 6 1 Amplifier Module PCB Assembly Drawing Page 6 2 BILL OF MATERIALS 5 812 Programmable Master Station 6 2 ASSEMBLY 710229 1 4 W 5 RESISTORS CC P N 410004 410071 410106 410010 410014 410011 410137 410016 410079 410018 410020 410084 410024 410148 410026 410028 410030 410045 1 4 W 1 RESISTORS CC P N 410144 410086 410105 POTENTIOMETERS CC P N 470053 10 90 Rev 0 1 DESCRIPTION 22 OHMS 100 OHMS 430 OHMS 1K OHMS 2K 5 2 2K OHMS 6 2K OHMS 10K OHMS 120K OHM
72. ematic Amp Module Schematic ELCO Module Schematic XLR Module Schematic Tuchel Module Schematic TABLE OF CONTENTS MS 812 Programmable Master Station ILLUSTRATIONS Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 Figure 1 5 Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 2 8 Figure 2 9 Figure 2 10 Figure 2 11 Figure 2 12 Figure 2 13 Figure 2 14 Figure 3 1 Figure 4 1 Figure 4 2 Figure 4 3 Figure 5 1 Figure 6 1 Figure 6 2 Figure 6 3 6 91 Rev 1 1 MS 812 Block Diagram MS 812 Front Panel MS 812 XLR Option Rear Panel MS 812 ELCO EDAC Option Rear Panel MS 812 Tuchel Option Rear Panel Installation Showing Termination Typical XLR System Connection XLR Rear Panel Typical ELCO System Connection ELCO EDAC Cable Description 30 pin Male Tuchel Connector Tuchel Option Wiring Diagram Typical Tuchel System Connection DB 15 PINOUT DB 9F PINOUT Typical IFB Installation 6 Pin IFB Cable Wiring Diagram Typical ISO Installation Location of Main Board Option Switches and Jumpers Null Adjustment of Line Drivers Front Panel Description Normal Menu Extended Menu input Pad for Mic Gain Measurement Amplifier Module PCB Assembly Drawing Front Panel PCB Assembly Drawing Main PCB Assembly Drawing DESCRIPTION Clear Com MS 812 Programmable Master Station SECTION 1 DESCRIPTION OF THE MS 812 PROGRAMMABLE MASTER INTERCOM STATION THE CLEAR COM CONCEPT
73. er assignment of the buttons is similar to the scheme used for IFB buttons refer to section 4 6 19 except that the starting number in the top left corner of the button pattern may not be 1 The first channel number may be set to some number other than 1 with the SET ISO FIRST CHANNEL NUMBER menu refer to section 4 6 22 An example of eight ISO channels starting with channel number 5 is as follows 5 6 7 8 9 10 11 12 4 6 24 SET ISO STATION NUMBER DEFAULT STATION 1 MENU TYPE Sub Menu in Extended Mode DIP SWITCH ENABLING DIP SW 5 ON Enabled You must identify the number 1 6 of the ISO Control Location Refer to the 150 4000 manual for more information Pressing the flashing SA button will step through the station numbers and display them on the LCD display The ISO station number is common to all four SETUPs and is not affected by SETUP RESET To allow for connecting an External ISO system without ISO contro signals the ISO Station Number can be set to 0 to indicate that the ISO sense is valid regardless of the presence of ISO contro signals on the 6 Pin data bus from the 150 4000 system The ISO transfer function will operate without ISO system connected If buttons are programmed to ISO function when the Control Station Number is set to 0 an error message will be issued and Button check will indicate the problem 4 6 22 SET ISO FIRST CHANNEL NUMBER 6 91 Rev 1 1 ISO 151 CH DEFAULT CHANNEL
74. fferent screens Software Rev X X Displays the Revision level of the software in the machine A Dip Sw XXXXXXXX Displays the setting of the internal DIP switches 0 OFF 1 ON C Standard Reverse Talk Lsn Talk Lsn Displays the orientation of the TALK LISTEN buttons 6 91 Rev 1 1 4 7 OPERATION MS 812 Programmable Master Station 4 2 8 3 ACCESSING PROGRAMMING MODE e Pressing and holding NEXT V and BACK A together for one second e will display the word Menu on the screen and cause the system to enter the programming mode Releasing and pressing both buttons again will cause the system to access the EXTENDED MENU if enabled Refer to section 4 5 for information on programming 4 2 8 4 STEPPING THROUGH MENUS When the system is in the programming mode the NEXT V and BACK A buttons enable stepping through the menus Pressing and releasing NEXT V steps forward in the menus while pressing and releasing BACK A steps backward in the menus Refer to section 4 5 for informa e tion on programming 4 2 9 RESET BUTTON Figure 4 1 ttem 17 There is a small unmarked hole between the NEXT V and BACK A buttons that provides access to a RESET button A smail screwdriver can be used to e depress this button The action of the RESET button depends on the operating mode at the time NORMAL OPERATION RESET Current SETUP If the RESET button is pressed during n
75. for two channel TW beltpacks TWC 104 Four Channel TW line converter A Four channel version of the TWC 10A 11 90 Rev 1 0 Page 2 1 INSTALLATION MS 812 Programmable Master Station 2 1 1 CABLE CONSIDERATIONS The Clear Com intercom line is intended to run on a shielded twisted pair of cable per channel of intercom One conductor carries full duplex two way audio the other conductor carries the DC power for remote stations The shield is used for ground return for audio and power When choosing interconnect cable keep the following considerations in mind 1 DC resistance of the ground or common conductor affects crosstalk For runs longer than 100 feet do not use wire smaller than 20 gauge The total resistance of the ground return the combined parallel sum of all shields to a location to any point in the system should be under 1 5 ohms 2 The capacitance of the interconnect cable affects system frequency response and side tone stability Total capacitance should not be greater than 0 25 uF capacitance between conductor and shield equivalent to an intercom system containing 5000 feet of cable at 50 pF per foot 2 1 2 PORTABLE INSTALLATION CABLE Typical cable for portable system interconnections is rubber jacketed two conductor shielded microphone cable For runs tess than 500 feet a cable made of 24 gauge wire is acceptable For runs longer than 500 feet use a 20 gauge cable or larger Portab
76. g procedure for NULL trimming 1 Remove the top cover of the MS 812 2 Turn the LOCAL SIDETONE trim control on the front panel fully off 3 Make sure that the line to be nulled to is configured as it will be in normal use including termination 3 With the front panel pushbuttons set a TALK and LISTEN only to the channel being nulled 4 Using a headset talk into the microphone and listen to the sidetone in the headphone 5 Adjust the NULL controt for the particular channel for a minimum sidetone null Refer to figure 3 2 for location of the controls Only the twelve intercom channels need to be nulled The IFB Line Drivers only drive the line and the listen circuits are not used Select another channel and repeat the procedure 6 If an ISO system is installed the ISO null control will also need adjustment Using a front panel button that has been programmed for ISO activate ISO such that the sidetone from the ISO line can be heard in the headphone Adjust the ISO null control for minimum sidetone Refer to figure 3 2 for location of this control MS 812 MAIN BOARD ASSY 710232 C INTERCOM FL CHANNELS 1 4 C INTERCOM CHANNELS 5 8 C INTERCOM CHANNELS 8 12 L CHANNEIS 1 4 f IFB CHANNELS 5 8 Figure 3 1 Null Adjustment of Line Drivers 11 90 Rev 1 0 OPERATION 5 812 Programmable Master Station e SECTION 4 OPERATION OF THE MS 812 PROGRAMMABLE MASTER INTERCOM STATION The MS 812
77. he illumination is dim for indicating OFF and bright for ON Overall brightness is adjustable by a front panel trim control LAMP BRIGHTNESS In normal operation a flashing button is a tally indication CALL iFB or ISO 4 2 1 MIC ON BUTTON Figure 4 1 item 1 The MIC ON button turns on or off audio from the microphone pre amp A MIC ON condition is indicated by bright illumination of the button If the microphone is turned off and a TALK path is requested by other button action at the station the microphone automatically turns on If the function was momentary function the microphone will return to the OFF condition when the function is released The MIC ON OFF control does not affect the HOT MIC output from the station 4 2 2 PANEL MIC BUTTON Figure 4 1 item 2 When a HEADSET is connected to the MS 812 the PANEL MIC button selects either the PANEL MIC or the HEADSET MIC Without a headset plugged into the unit the Panel microphone is always selected the PANEL MIC button will be illuminated and the button will not operate there is no HEADSET MIC to select An illuminated button indicates Panel microphone operation When a headset is initially plugged into the station the microphone pre amp is automatically switched to headset Unplugging a headset automatically returns the unit to Panel microphone operation When a headset is plugged in the PANEL MIC button is used to select between the two microphones 4 2 3 SPEA
78. hone through a front panel level control The other is used to selectively feed the 12 intercom channels PROGRAM INTERRUPT A single channel interruptibie program PROGRAM 2 feed to each TALK channel is available This function is programmable on a channel by channel basis PRIVATE TALK LISTEN FUNCTION button can be temporally programmed to disable all other talks and listens to all channels except the one being talked to 11 90 Rev 1 0 Page 1 8 DESCRIPTION Clear Com MS 812 Programmable Master Station CALL IN FUNCTION An incoming CALL signal will flash the LISTEN button for the channel The flashing CALL indication will time out and disappear after a preset time period This time out period is programmable Whether or not a CALL signal can be received on a particular channel is programmable A BEEP will sound in the speaker when a CALL is received The BEEP TONE can be disabled or enabled individually An incoming call signal can be programmed to activate a LISTEN and or TALK on that channel CALL OUT FUNCTION A CALL button allows sending a call signal out Pressing the CALL button enables the CALL function If while the CALL function is enabled one or more of the TALK buttons is pressed a CALL signal will be sent to that channel The CALL function will automatically time out Individual TALK buttons can be programmed to send a CALL when pressed IFB CLEAR COM 4000 There are two 4 channel IFB ports available
79. ify accessory equipment to be used with the system Plan powering of remote stations and accessory equipment as the MS 812 does not supply system power Identify station locations Plan and install cable runs identify and set or install internal options in MS 812 stations Install the MS 812 Check out the hardware installation by exercising the station Enter the program mode of each individual station and set the desired program options CAUTION Clear Com Intercom lines must be terminated Care must be taken not to fail to terminate or to double terminate a line All unused intercom inputs should be terminated to keep the line drive circuits stable Clear Com provides a complete line of intercom products An important part of this product line is a series of Interface products that allow a user to link Clear Com with virtually any type of communication system or equipment The following is brief descriptions of these products AC 10K Universal interface Clear Com to 2 3 or 4 Wire circuits AC 10H Telephone interface Clear Com to telephone lines 4 4 4 Wire Camera interface Four channels of Clear Com to 4 Wire conversion TW 12B System to System Interface Provides ground isolation and correct termination between two Clear Com systems and or conversion from Clear Com to RTS systems TWC 10A TW line converter Converts two Clear Com lines into a two channel single pair format
80. ill respond by reflecting your choice Then position the remaining desired channels by pressing the TALK buttons on either side of the first two Buttons previously programmed for ISO see section 4 6 20 below will not be available for IFB The microprocessor will automatically number and activate the proper IFB line drivers and buttons The channel number assignment to the buttons will be as foliows 4 6 20 SET ISO BUTTONS 11 90 Rev 1 0 SET ISO BUTTONS DEFAULT None Programmed MENU TYPE Sub Menu in Extended Mode DIP SWITCH ENABLING DIP SW 5 ON Enabled The 812 can control an external 150 4000 Station ISO Electronics This menu item allows the selection of where on the panel the ISO buttons appear and how many ISO channels are accessed 2 4 6 8 10 12 14 or 16 NOTE ISO buttons are numbered like IFB buttons All of the available button positions will flash The chosen positions will be on solid Buttons previously programmed for IFB will not be available for ISO First choose the starting position of the first two channels by pressing the desired talk button The button lamps will respond by reflecting your choice Then position the remaining desired channels by pressing the TALK buttons on either side of the first two SET ISO BUTTONS continued OPERATION Clear Com MS 812 Programmable Master Station The microprocessor wili automatically number and activate the proper buttons The channel numb
81. is multi channel intercom station with the exact function of front panel controls being definable by the user As shipped from the factory all programming options are set for default settings With default settings the station will function as a simple 12 channel intercom Special functions such as IFB ISO and RELAY activation will need to be programmed SETUP MEMORY The configuration or SETUP of the station is saved in NVM Non Volatile Memory such that the SETUP is saved during power down There are four complete setups saved Each SETUP is a complete personality for the machine KEY ACTION All illuminated buttons are dual action If pressed for a short period of time less than 1 4 second the button will UATCH when released If pressed longer the button will be momentary The button is solid illuminated when the function is on Latching action can be disabled on certain buttons through the LATCH DISABLE function in the programming mode BUTTON FUNCTION TYPE Because the station is programmable the fundamental way a button works can be different Besides the special function buttons such as MIC ON PANEL MIC ON SPKR ON CALL and SA the buttons can be programmed to five distinct types of functions NOTE Because the 24 selector buttons default to intercom functions they are referred to as TALK and LISTEN buttons INTERCOM Operation Intercom operation is the default type for all TALK LISTEN buttons INTERCOM mode the
82. is available on the DB 15 This input only feeds the speaker and headphone outputs whereas PGM 1 is intended for program feed to intercom lines 2 3 5 2 HOT MIC OUTPUT The HOT MICROPHONE output is a continuous feed from the microphone pre amplifier output The output level is 8 dBv into 600 ohms 2 3 5 3 STEREO HEADSET CONNECTION The DB 15 also contains a Stereo Headset Output The Microphone input and the Left earphone output are paralleled to the front panel headset connector Normally the Left headphone contains program and intercom audio For stereo operation it is desirable to split the feed to the headphones The Right ear only contains Program Removal of jumper J34 allows disabling of program to the Left ear See figure 2 14 on page 2 16 for location of J34 on the main PCB 2 4 DB 9 LOGIC CONNECTOR LOCAL RELAYS and FOOT SWITCH A DB 9F on the left end of the rear panel marked RELAY FOOTSWITCH provides the contacts of two LOCAL relays that are under program contro and the FOOTSWITCH input The following diagram shows the pinout of the connector FOOT SWITCH GND FOOT SWITCH HOT RELAY 2 RELAY 2 d 2 BEAT RELAY 1 WIPER Figure 2 10 DB 9F PINOUT The relay contacts are Form C and rated at 1 Amp at 30 VAC The Footswitch input is a logic input used by the program as another PRESET An input is a contact closure between this input and logic ground The input is normally pulled up to 5 VDC 11 9
83. itches Pressing a PRESET removes all current button settings and replaces them with the PRESET s functions Pressing a second PRESET while another is active will remove the first PRESET and activate the second PRESET s functions If the second preset is momentary in action when it is released the station will return to the operation setup by the first latched PRESET When all PRESETS are removed the station will return to whatever setup was present before any PRESET was activated ADDITIVE MODE inthe additive mode multiple PRESETs simply add their respective functions and only remove their respective functions when turned off OPERATION 5 812 Programmable Master Station 4 6 3 FOOTSWITCH ASSIGNMENT FOOT SWITCH DEFAULT No buttons programmed to footswitch MENU TYPE Extended Mode DIP SWITCH ENABLING None Allows an external switch usually a foot switch to activate any combination of front panel buttons 4 6 4 ENABLE CALL IN ENABLE CALL IN DEFAULT Enabled on all channels MENU TYPE Normal or Sub Menu in Extended Mode DIP SWITCH ENABLING None Allows selection of which channels respond with a flashing button to an incoming CALL signal from the intercom line 4 6 5 _ CALL IN BEEP DEFAULT Disabled MENU TYPE Normal or Sub Menu in Extended Mode DIP SWITCH ENABLING None Allows selection of which channels respond with an audible BEEP tone to an incoming CALL signal from
84. le remote stations such as belt packs each have of input and output connectors when installing a system that includes these they can be daisy chained along one interconnect path Clear Com provides a one input by three output Line Splitter QP 100 that can also simplify wiring Daisy Chaining and Line Splitting decreases the amount of cable required and simplifies the installation 2 1 3 PERMANENT INSTALLATION CABLE Vinyl jacketed shielded pair is the cable of choice for permanent installations Use a low capacitance 20 gauge wire for short runs under 500 feet and 18 gauge cable for runs greater than 500 feet Placing the cable in conduit is recommended but not necessary Multi pair cable that is individually shielded is acceptable for use in multi channel systems For cross talk considerations the shields must be tied together on both ends of the cable to produce the lowest possible DC path for ground return 2 1 4 CABLE INSTALLATION EFFECTS ON CROSS TALK 11 90 Rev 1 0 When multiple channels are fed to remote stations the amount of cross talk between channels is proportional to the amount of DC resistance in the ground return path back to the termination of the channels The cable used in Clear ELCO multi pair cables has a combined shield resistance of 0 11 ohms per 100 ft The crosstalk due to cable resistance is predictable with the following chart 100 ft 61 dB 700 ft 50 dB 300 ft 57 dB 900
85. lowing the MS 812 to emulate a up to four ICP 4 control modules XLR 3M connector provides a control signal from the 50 4000 causing a audio interrupt in the MS 812 placing it in isolated conversation through the ISO system 150 16 is an option that provides just the rear panel connectors installed for and ISO operation CABLING For ISO control use a 6 pin XLR cable wired as for IFB see previous page For ISO Audio use a single pair shielded cable identical to that used tor Clear Com intercom lines ISO Connector Pinout Pin 1 Ground Pin 2 30 VDC unused by MS 812 Pin 3 Serial Data from MS 812 Pin 4 Serial Clock from ISO 4000 Pin 5 Serial Data from ISO 4000 Pin 6 Reset Signal from ISO 4000 ISO Audio Connector Pinout 1 Ground Pin 2 Interrupt Control 15 Signal Pin 3 ISO Audio CAMERAS ISO AUDIO TRANSFER MS 400A Ki 8 ISO AUDIO TRANSFER CONTROL DIRECTOR CONTROL Typical ISO Installation Figure 2 13 11 90 Rev 1 0 Page 2 15 INSTALLATION Clear Com MS 812 Programmable Master Station BIT SWITCHES LJ lt ul ul J rn lt 2 pars Pp EI ber 52 5 EC 8 1 0338 EU GLOBAL RELAY 1 4 5 8 LEFT EAR PGM IFB 1 4 PGM i SPEAKER INTERCOM 9 12 ISO SIDETONE
86. me BUTTON ACTION All buttons on the front are both latching or momentary in action A short press of the button causes a latching of the function Holding the button causes the button press to only have action while the button is pressed momentary The latching function of any button can be disabled in the programming mode BUTTON CHECK FUNCTION A special diagnostic function allows the user to identify all programming options that have been assigned to any button PRESETS Four user programmed preset buttons are available Each preset button can be programmed to operate any key combination on the station FOOT SWITCH INPUT A rear panel input allows the logical control of any front panel function a FOOT SWITCH or other logic input USER CONTROLLED RELAYS Two local and four global system relays may be programmed to any button on the front panel The contacts of the local relays are available on the rear panel of the station The global relays are located external to the station AUTOMATIC HEADSET DETECTION The connection of a headset is sensed and the Headset Microphone is switched on and the Speaker and Panel Mic is switched off Unplugging of the headset returns the station to Panel Mic and Speaker operation While the headset is plugged in manual selection of microphones and speaker 15 available TWO PROGRAM FEEDS Rear panel connectors allow program inputs for two different purposes One directly feeds the Speaker or Headp
87. mer isolated XLR 3F input of Program for distribution to all MS 812s A transformer isolated XLR 3M output of a common SA bus from all MS 812s 4 sets of Form C contacts of relays that can be controlled by any MS 812 DESCRIPTION OF 16 PAIR ELCO CABLES Clear Com provides a variety of lengths of these 16 pair cables already assembled Custom lengths can be assembled to customer order Please contact your dealer or the Clear Com sales department for more information Figure 2 x on page 2 8 describes these cables Page 2 7 INSTALLATION Clear Com 5 812 Programmable Master Station pcne s LENGTH O lt Je 550 MALE MALE MULTICABLE ASSEMBLIES PART NO 73019 730120 730121 730122 CONNECTOR COVERS MALE CONNECTOR CRIMP CONTACT REAR WIRING VIEW OF 93950 96 Oe 5 E e 6H 7H INT 7 5 8H BE A 22 DESCRIPTION 10 Ft CABLE 25 Ft CABLE 50 Ft CABLE 100 Ft CABLE EDAC 516 230 556 ELCU 00 8016 056 000 601 ELCO 60 8017 0323 MALE CABLE 601 gt CONNECTOR O90 esos CABLE EXITS FRDM THIS END SMALL GUDE PIN WIRE ESC RED MCI Sep o RED pm war P456 SE CT ond i 260 3p mw iie C Figure 2 5 ELCO EDAC Cable Descri
88. ms necessary to operate the station for a majority of applications EXTENDED Added menu items allowing the user more complex use of the machine INTERNAL DIP SWITCH OPTIONS A series of internal DiP switches enables special function menus These DIP switches only affect the availability of the related menus 11 90 Rev 1 0 Page 1 9 DESCRIPTION MS 812 Programmable Master Station 1 9 TECHNICAL SPECIFICATIONS CONTROL SYSTEM 8 bit microprocessor Motorola 68HC11 with 16 bytes of program memory 4 K bytes RAM and 512 bytes EEPROM AMPLIFIER DESIGN IC Amplifiers are used extensively All signal switching is CMOS logic controlled switches Front panel control of Audio levels is through the use of VCAs MICROPHONE PRE AMP Dynamic Headset Input Input Impedance 200 Ohms Input Level 55 dBv nominal Input Level 10 dBv max Panel Mic Input Level Input level 41 dBv nominal Input level adjustment range 5 dB Frequency Response 250 Hz to 12 KHz contoured for intelligibility Limiter Range Gain from Headset to Intercom Line 41 dB HEADPHONE AMPLIFIER Load Impedance 50 2000 Ohms Output Level at least 20 dBv across 600 ohm Distortion 0 295 THD at 1 KHz Frequency Response 150 18KHz 2dB Gain from intercom Line SPEAKER AMPLIFIER Load Impedance 8 50 Ohms Outpu
89. mware and license to another party if the other party agrees to accept the terms and conditions of this Agreement Clear Com grants a license to such other party under this agreement and the other party will accept such license by its initial use of the program If you transfer possession of any copy of the firmware in whole or in part to another party your license is automatically terminated The firmware contains confidential information pertaining to Clear Com You may not modify reverse compile rent lease or distribute the firmware or any copy in whole or in part The license is effective until terminated 11 90 Rev 0 2 Page i 3 TABLE OF CONTENTS MS 812 Programmable Main Station Disclaimer of Warranty The program is provided as is without any warranty of any kind either expressed or implied with respect to its merchantability or its fitness for any particular purpose The entire risk as to the ability and performance of the program is with you Should the program prove defective you and not Clear Com or an authorized Clear Com representative assume the entire cost of all necessary servicing repair or correction Clear Com does not warrant that the functions contained in the program will meet your requirements or that the operation of the program will be uninterrupted or error free or that defects in the program will be corrected Some States and Provinces do not allow the exclusion of implied w
90. ng system CP 56 is the dual loop thru ELCO EDAC 56 Pin Connector Option panel for the rear panel for interconnecting stations via a single multi pair cable CP 30 is the dual loop thru TUCHEL 30 pin Connector Option Panel for the rear panel for interconnecting into an existing MS 808 system using the multi pair cable used in that system IP 1200 is an interconnect panel designed specifically to terminate and provide individual channel breakout when interconnecting MS 812 s with an ELCO cable This panel also provides power distribution with overload protection for external individual intercom lines such as Belt Packs The IP 1200 also has program inputs that can be feed to all MS 812s connected Also a global SA output is available that any of the MS 812s can feed There are four relays in the IP 1200 that any of the MS 812s can operate ELCO CABLES Pre made 56 Pin multi pair ELCO EDAC cables are available both from Clear Com and independent sources Contact factory for details 11 90 Rev 1 0 DESCRIPTION MS 812 Programmable Master Station 1 7 MS 812 SPECIAL FEATURES MULTIPLE SETUP MEMORIES The attributes and functions of the buttons and many other station functions are programmable by the user and are saved in Non Volatile EEPROM memory Four banks of memory are available allowing FOUR complete to reside the machine Four completely different setups can be ready to operate anyti
91. nto the front panel connector 11 90 Rev 1 0 OPERATION MS 812 Programmable Master Station 4 5 STATION PROGRAMMING A major feature of the MS 812 is that the function and attributes of front panel buttons can be defined by the user Multiple versions four of these setups can be saved in Non Volatile Memory that is secure during power down of the station The LCD display guides the user through multiple menus for programming Two different levels of menus are available Once in the Programming Mode the NEXT V and BACK 4 buttons are used for stepping from menu to menu a given menu function buttons that are available to be programmed to the particular function are Flashing Buttons whose lamps are on solid are programmed for that function Buttons whose lamps are off are not available for the function Some functions interact example An intercom channel cannot be programmed for program interrupt unless its program feed is enabled A button that is LOCKED OFF cannot be LOCKED ON If a particular menu item is a Sub Menu the SA button will flash Pressing the SA button will open the availability of items inside the Sub Menu Going on to the next menu item without pressing SA will skip all of the Sub Menu items NORMAL MENU Once a station is setup the day to day operation of the machine usually will not require all of the programming features available A shortened version of the programming menu provi
92. ograms work at all they generally completely work Program faults show up as functions that do not work as intended 2 Check the 5 volt supply for voltage 4 75 to 5 25 volts and noise Power supply noise must be less than 50 3 Check for the presence of a system clock signal aprox 1 8 MHz square wave on Pin 6 of IC8 5 2 2 FRONT PANEL LOGIC FLOW LCD DISPLAY The LCD Display contains its own drive and scan circuitry To the microprocessor it is a memory mapped device on the data bus FRONT PANEL BUTTONS front panel buttons are read indirectly pulling one of its output pin down thereby placing any closed switches on the inputs of IC2 To the microprocessor IC2 and IC3 are memory mapped devices Typical problems in this area are shorted buses or shorted blocking diodes 11 90 1 0 5 2 MAINTENANCE MS 812 Programmable Master Station FRONT PANEL LAMPS Ail but one of the front pane lamps are controlled by a 32 bit shift register 1 with output drive capability The SA lamp is driven from a shift register located on the main board The serial inputs of 1 are generated by the microprocessor program using as output to IC1 it will be noted that each driver output has a resistor across it providing some current to the lamps this off current is the dim level of the lamps 5 2 3 LINE DRIVE MODULE CONTROL The Four Channel Line Drive Module has 12
93. or The legends in the keycaps are removable and changeable by the user The overall brightness of the button illumination is set by a front panel trim control PANEL MOUNT ELECTRET MICROPHONE HEADSET JACK FRONT PANEL SPEAKER MIC ON OFF Button and ON indication PANEL MIC SELECT Button and indication SPEAKER ON OFF Button and ON indication 4 PRESET Buttons Programmable SA Button Stage Studio Announce CALL FUNCTION Enable Button 24 SELECTOR Buttons 12 LISTEN LEVEL Trim Controls PROGRAM Listen Level Control MASTER Intercom Level Control 8 Char X 2 Row LCD Display 2 PROGRAM SETUP BUTTONS DEFAULT RESET BUTTON Accessible through a hole between SETUP buttons TRIM CONTROLS PROGRAM FEED LEVEL to intercom Lines SPEAKER MUTE LEVEL BEEP TONE LEVEL Speaker only LOCAL SIDETONE LEVEL Headphone only LAMP INTENSITY 11 90 Rev 1 0 DESCRIPTION Clear Com MS 812 Programmable Master Station FIGURE 15 TUCHEL OPTION 1 3 REAR PANEL DESCRIPTION INTERCOM SYSTEM CONNECTIONS To accommodate different sizes and types of systems a section of the rear panel is a removable plate allowing several optional connector schemes to be implemented 12 XLR Clear Com Intercom connectors with jumper selectable line terminators Two paralleled 56 pin ELCO or EDAC connectors to provide loop through or connection to a system This option requires termination to be provided
94. ormal operation all the buttons will flash as a warning and the LCD display will show RESET with a series of arrows on the bottom row progressing across the screen After four seconds the bottom row of the screen will be filled with arrows and then the system will RESET only the current SETUP programmed options will be reset to DEFAULT conditions except for current setup name and ISO Station Number 6 91 Rev 1 1 Page 4 7B OPERATION Clear Com MS 812 Programmable Master Station RESET continued PROGRAMMING MODE RESET Selected Menu Item If the RESET button is pressed while in the Programming Mode the currently selected menu item wiil be set to its default setting POWER UP RESET Complete Memory Clear If the RESET button is depressed while the AC power is turned on the system will completely reset all four SETUPS to Factory Defaults This RESET mode should only be used to totally clear the machine 4 3 DESCRIPTION OF FRONT PANEL CONTROLS 4 3 1 PROGRAM VOLUME Figure 4 1 item 9 The PROGRAM VOLUME control sets the amount of external program heard in the speaker and headphones 4 3 2 INTERCOM VOLUME Figure 4 1 item 11 The INTERCOM VOLUME control sets the overall Listen level of the intercom lines Each of the twelve intercom lines also have a Listen level trim control located under each of the respective TALK buttons 4 3 3 PROGRAM FEED Trim Level Figure 4 1 item 5 The FEED trim control
95. osition certain front panel buttons could be set permanently ON The DIP SW could then be set to OFF but the particular buttons would be locked ON but the user could not change it An internal DIP Switch option allows the reversal of the TALK and LISTEN but tons on the front panel DIP SW 7 places the LISTEN buttons on the bottom row and the TALK buttons on the top row All programmed options will track their appropriate buttons Channel number assignment for IFB and ISO are also swapped Channel 1 would now be on the bottom row Section 4 6 19 explains the normal channel numbering scheme The same examples in the REVERSE mode are as follows 2 8 CONNECT MS 812 INTERCOM STATION TO A SOURCE OF A C POWER The Station is typically shipped configured for the country of installation The internal 110 220 VAC switch located inside the chassis allows configuration for locally available line voltage To access the internal 110 220 VAC switch unplug the AC power cord Then unscrew and remove the top cover of the Intercom Station The switch is located on top of the AC connector block inside the chassis and is labeled 110 220 THE FUSE MUST BE CHANGED 110V uses 0 5A slow blow 220V uses 0 25A slow blow Remember to also replace the original spare fuse located in the fuse holder with one that matches the voltage setup Plug the power cord extending from the Intercom Station s rear panel into a source of AC power 6 91 Rev 1 1
96. preset activity ADDITIVE In this mode multiple presets will simply add functions to what is aiready active Removing a preset in this mode will only remove those functions added by that preset 4 2 5 CALL BUTTON Figure 4 1 itern 7 The CALL button is used to enable sending a CALL to the intercom lines it does not directly send a CALL signal Pressing CALL enables the CALL function and illuminates the button Pressing a TALK key while the CALL button is illuminated will send a CALL signal on that intercom line The CALL function wili time out and turn itself off if it is not used for 3 seconds 4 2 6 SA BUTTON Figure 4 1 item 8 11 90 Rev 1 0 The SA button is used to activate the Stage Announce output of the station If pressed in normal operation all active TALKs will turn off and the microphone pre amp output will be routed to the SA output The SA button is default programmed for PRIVATE LISTEN which can be disabled if normal Listens are desired If SA has been assigned to a PRESET button it will not affect the other TALKs and 115 set to the PRESET If a contact closure is desired when the SA button is pressed one of the local or global relays would need to be programmed to the button The SA button is default programmed for LATCH DISABLE making it momentary If desired latching action can be restored using the Latch Disable menu in the programming mode OPERATION Clear Com 5 812 Programmable Master S
97. ptions 10 91 Rev 1 1 Page 2 8 INSTALLATION MS 812 Programmable Master Station 2 2 3 TUCHEL MULTI PAIR CABLE INSTALLATION CP 30 This option provides two 30 pin Tuchel male connectors in parallel wired for pin compatible with Clear Com s MS 808 This option allows an 5 808 installation to expand using MS 812s All functions that are provided in the Tuchel from the MS 808 is available in the MS 812s The next page 2 10 shows a block diagram of a typical system MS 812s connected together with this cable style can communicate to each other regardless of the presence of MS 808s or without the need of a system power supply The following chart is the pin assignment of the Tuchels A1 INTERCOM 1 A2 INTERCOM 2 A3 INTERCOM 3 A4 INTERCOM 4 A5 INTERCOM 5 A6 INTERCOM 6 A7 INTERCOM 7 A8 INTERCOM 8 A9 INTERCOM 9 IFB 1A A0 GROUND B1 30 Volts B2 30 Volts B3 INTERCOM 10 IFB 2A B4 INTERCOM 11 IFB 3A B5 INTERCOM 12 IFB 4A B6 IFB 1A IFB 18 B7 IFB 2A IFB 28 B8 2 B9 N C GROUND C1 N C C2 IFB 4A IFB 4B PROGRAM 1 C4 PROGRAM 1 C5 PROGRAM 2 C6 PROGRAM 2 C7 N C C8 N C C9 N C GROUND Figure 2 6 30 Pin Male Tuchel Connector Viewed From Inside Chassis OPTIONAL CONNECTION OF THE TUCHEL OPTION Pins 9A 3B 4B and 5B show an optional purpose By placing the header connected to thes
98. roprocessor The MS 812s software simulates the activity of ICP 4 modules that are usually used to control the ISO system The inputs from the ISO system are AC coupled to the inputs of IC3 is a Schmidtt trigger type device thereby cleaning up the ISO bus signals MAINTENANCE Clear Com MS 812 Programmable Master Station 5 3 ANALOG DESCRIPTION 5 3 1 CLEAR COM LINE DRIVERS Clear Com intercom systems are designed around the concept of high impedance current sources driving a common low impedance load The line drivers provide a current signal that develops a voltage across the termination If Clear Com line is not terminated properly signal levels will be non standard Mutiple termination will produce low levels No termination will produce excessive levels and high distortion The standard Clear Com termination is 220 Ohms in series with 4 7 K Ohms with a 10 uF electrolytic capacitor across the 4 7 K resistor This network exhibits an impedance of 220 Ohms at audio frequencies with its impedance increasing to 5 K Ohms at DC The higher DC impedance is necessary to allow the Clear Com CALL signal to have a higher voltage level NOTE Unused intercom lines should be terminated Unterminated line drivers may oscillate and cause general noise in the system it is permissible to short unused line drivers to ground The SA output to the ELCO cable and 150 Audio is the same type of driver and must have termination Clear Com CA
99. s of the illuminated buttons is controlled by the LAMP BRIGHTNESS trim control It simultaneously adjust both the Dim OFF and Bright ON intensity 4 3 8 LISTEN LEVEL TRIMS Figure 4 1 item 13 The INTERCOM VOLUME control sets the overall Listen level of the 12 intercom channels Each of the twelve intercom channels also have LISTEN TRIM controls located under each of the respective TALK buttons These LISTEN TRIM controls allow the individual level adjustment of each intercom channel These controls only have a range of 20 dB The fully clock wise position of the controis is the normal listen level 4 4 HEADSET CONNECTOR The HEADSET CONNECTOR allows the user to connect a mono headset directly in the front panel The presence of a headset is sensed by the systems microprocessor Connecting a headset will cause the station to automatically switch to the headset microphone and turn the speaker off Disconnecting a headset will cause the station to switch to the Panel microphone and enable speaker operation While a headset is connected it is possible to select microphones and turn the speaker on and off with the PANEL MIC button and SPEAKER ON button If this connector is not used but the rear panel access of the headset circuit is used to bring the headset connector out to some other location other than the front panel the presence of a headset will still be sensed and the station will operate as if the headset were plugged i
100. s removed or defaced not covered by this warranty To obtain warranty service follow the procedures described below in Procedures for Returns and Shipping to Manufacturer for Repair or Adjustment This warranty is the sole and exclusive express warranty given with respect to Clear Com products It is the responsibility of the user to determine before purchase that this product is suitable for the user s intended purpose Any and all implied warranties including the implied warranty of mer chantability are limited to the duration of this express limited warranty Neither Clear Com nor the dealer who sells Clear Com products is liable for incidental or consequential damages of any kind Return Shipping Instructions 11 90 Rev 0 2 Procedures for returns If repair is necessary contact the dealer where the unit was purchased repair through the dealer is not possible contact the Clear Com Customer Service Department located at the factory as directed below They will issue a Retum Authorization Number RMA Do not return any equipment to the factory without first obtaining a Return Authorization Number Be prepared to provide your company s name address phone number name of person to contact regarding the repair type and quantity of the equipment description of the defect and the equipment serial number s Questions regarding retums for repair should be directed to Customer Service Department
101. t 12 3 4 5 6 7 8 9 0 11 12 1 2 3 4 5 6 7 8 9 10 11 12 CALL SIGNAL ENABLE CALL IN ACTIVATE TIME Amount of time button continues to flash after incoming call signal is removed Use SA button to select GlearCom 5 812 PROGRAMMING WORKSHEET Intercom Systems LOCAL PROGRAM INTERRUPT 5 6 8 9 10 12 1 2 3 4 5 6 7 8 9 Q 11 12 RELAYS LOCAL RELAY 1 LOCAL RELAY 2 GLOBAL RELAY 1 ECCI TEST BUTTON FUNCTIONS ex PRIVATE TALK PRIVATE LISTEN 8 9 10 11 12 4243 I 5 IFB BUTTONS ISO BUTTONS ISO STATION ISO ist CH Station 0 6 Channel 1 15 1 2 3 4 5 6 7 B 9 0 11 12 1 2 567 8 9 0 n 1 select select Use SA button to Use SA button to
102. t Power 4 Watts into 8 ohms Distortion lt 0 5 THD at 1 KHz Frequency 200 Hz to 15 KHz 2 dB Gain from intercom Line PROGRAM INPUTS Input Level Ref 15 dBv Input Impedance gt 10 KOhms Frequency Response 150 Hz to 18 KHz INTERCOM LINE DRIVE RECEIVE CIRCUITS Impedance Output Load gt 10 KOhms 200Hz 10 KHz Level Nominal Line 200 ohm load 9 dBv Level Max Before Clipping 200 ohm load 5 dBv Sidetone Null Capability gt 25 dB 200Hz 10 KHz Crosstalk Station Induced Ch to Ch Noise SN Ratio in Listen Channels gt 60 dB INTERCOM SYSTEM SPECIFICATIONS STANDARD CLEAR COM Usable Line Quality up to 100 Stations and 5000 feet of line Crosstalk For 2 lines terminated at one end the crosstalk at the far end shail be 500 ft lt 52dB 11 90 Rev 1 0 Page 1 10 DESCRIPTION Clear Com MS 812 Programmable Master Station POWER SUPPLY The internal power supply is intended to only power the internals of the MS 812 An external Intercom System must be powered externally 30V 15V and 5V internal power supplies are electronically regulated CONNECTORS 1 4 Phone Jack 1 4 Phone Jack Auxiliary Audio Connections Control Relays and Foot switch Optional ISO Optional IFB AC POWER REQUIREMENTS PHYSICAL SPECIFICATIONS Dimensions 19 x 3 5 x 9 2
103. tation 4 2 7 TALK and LISTEN BUTTONS Figure 4 1 items 4 and 14 INTERCOM USE The top row 4 of the twenty four buttons in the middle of the station are used to turn on LISTENS to an intercom channel The bottom row of buttons item 14 turns on TALKs to the corresponding intercom channel Incoming call signals will flash the appropriate Listen button If CALL IN on a particular channel enabled As shipped from the factory all call in signaling is enabled Sending of call signals is accomplished by enabling the CALL send mode with the CALL button and then pressing the appropriate TALK button and ISO USE Groups of buttons can be programmed for control of IFB or ISO channels if desired When programmed for these functions the normal and LISTENs for the particular channe are lost to the user Example If channels 11 and 12 are programmed for IFB intercom channels 11 and 12 are no longer active at this station 4 2 8 NEXT V and BACK 4 PROGRAM BUTTONS Figure 4 1 items 16 and 18 The two black pushbuttons located just below the LCD display marked V NEXT and BACK are intended primarily for programming purposes During normal operation these buttons have specia functions The terms NEXT and BACK will be used in the following text 4 2 8 1 SELECTING SETUPS NEXT V In normal operation the NEXT button is used to select other system setups Pressing and holding the NEX
104. tch located inside the chassis iets you reconfigure for the local line voitage To access the internal 110 220 VAC switch unplug the AC power cord Then unscrew and remove the top cover of the Intercom Station The switch is located on top of the AC connector block inside the chassis and is labeled 110 220 You also must change the fuse 110V uses 0 5A slow blow 220V uses 0 25A slow blow Remember to also replace the original spare fuse located in the fuse holder with one that matches your setup 3 2 INTERNAL ADJUSTMENTS There are very few internal adjustments in the MS 812 3 2 1 PANEL MICROPHONE GAIN TRIM The Panel Microphone gain can be adjusted for a particular person or environment that the station is being used In a high noise environment the gain should be set low causing the operator to work the microphone closely and thereby reducing the influence of background noise Some installations require that the operator work the microphone from a distance in this case the gain should be set high The gain of the microphone preamplifier is adjustable when it is switched to the Panel Microphone Potentiometer P1 allows a 5 dB adjustment in gain See figure 3 1 for location of this control 3 2 2 INTERCOM LINE NULL SIDETONE ADJUSTMENT 11 90 Rev 1 0 SIDETONE is the amount you hear yourself in your own headset In headsets a controlled amount of sidetone is desirable for assurance that the microphone is on Side
105. tion networks necessary Each MS 812 provides its own power so no power distribution is necessary TWO ACCESSORY XLR CONNECTORS It will be noted that there are also two XLR connectors on the CP 56 option panel These two connectors are intended for tocal feed of up to two channels of intercom from any MS 812 Removal of the CP 56 pane will reveal that the two connectors are jumper connected to channels 1 and 2 of the system Easy reassignment of these XRL connectors is accomplished by moving the jumpers to the desired channel No power is available on these connectors for operating a remote station A two channel main station CS 210 or power supply PS 20 would easily provide this function 16 PAIR CABLE FEATURES This 16 pair cable scheme provides a path for a number of system signals 12 Intercom Lines System SA Feed System Program Feed System Wide Control of 4 Global Relays located in the IP 1200 IP 1200 SYSTEM INTERFACE PANEL The 1200 provides a number of functions necessary to tie a system together Two XLR 3M connectors per channel providing multiple feeds to external intercom components Switchable line terminations for each of the twelve intercom lines A single XLR connector provides input from an external power supply for distribution of DC power to the XLR connectors with individual circuit breakers for each channel Each channel also has power GOOD and FAULT LEDs per channel A transfor
106. tone in a speaker can cause feedback and is not desirable The MS 812 has a front panel SIDETONE control that sets the amount of LOCAL sidetone heard in the headphone The Line Driver circuitry consists of a hybrid null circuit that attempts to reject all of the TALK signal being sent to the intercom line The rejection NULL circuit compares the intercom line with the send TALK signal The balance of this circuit depends on the impedance of the intercom line to be stable The NULL adjustment control compensates for variations in line impedance due to various amounts of cable and numbers of stations on the line mis adjusted NULL control on a line driver will cause extra sidetone in the headphone that is not controllable on the front panel The ideal setup is to have no sidetone from the line driver therefore the only sidetone heard is that inserted by the front panel trim control Excessive sidetone in the speaker will cause feedback continued SETUP 8 ADJUSTMENT MS 812 Programmable Master Station NULL ADJUSTMENT OF LINE DRIVERS Each intercom Line Driver circuit has a NULL control allowing it to be matched to impedance of the particular intercom line it is connected to As shipped from the factory the NULL control has been set for a Clear Com line of 200 feet which will produce acceptable results for lines from 0 to 500 feet For optimum results with these short lines or use of longer lines follow the followin
107. try of one unit and requires connection to 120 240 VAC 50 60 Hz The external Intercom system will need a standard Clear Com power supply SYSTEM INTERCONNECT A portion of the rear panel is removable offering the user several options on type of system interconnection The standard version of the MS 812 is shipped with 12 XLR connectors for CC intercom lines with line termination jumpers available from the rear of the unit Other options available are CP 56 Two paralleled 56 pin ELCO EDAC connectors provide Multi pair cable connection between stations and Clear Com s IP 1200 System Interface Panel CP 30 Two 30 pin Tuchel connectors wired like a MS 808 for connection into existing MS 808 systems 11 90 Rev 1 0 9 5 5 g N gt 2 2 tr 4a 5 SISSVHO M0SS3208d 032IN SdNv SNOLLhGHShd mp mrs ITL 300 000 H 4 Li 8 9 1 NODUIIM gt gt 4 gt gt gt nta ii FIGURE 11 MS 812 BLOCK DIAGRAM 11 90 Rev 1 0 DESCRIPTION MS 812 Programmable Master Station 5 812 MASTER STATION FIGURE 12 FRONT PANEL 1 2 FRONT PANEL DESCRIPTION All front pane pushbuttons except the two programming buttons are illuminated and under control of the micro process
108. tton can be pro grammed to allow communications on all other intercom talk paths to continue ISO Operation continued 6 91 Rev 1 1 OPERATION MS 812 Programmable Master Station ISO Operation continued By default the ISO function is also a PRIVATE LISTEN Function all other LISTEN Paths are momentarily disabled during the ISO operation The button can be programmed for Listen RELAY ONLY Operation If a button has no other assigned purpose but has a relay assigned it will become a RELAY ONLY button operating no other function than the relay assigned to it If all of the Line Driver Modules not installed and the buttons that are associated with the missing module is not programmed to ISO or IFB the button would have no purpose It might be desirable to program such a button for just relay activation An unassigned PRESET button will also fall into this category It is important to remember that buttons can be programmed to operate nothing but relays If pressing such a button and no apparent action at the station results it must be remembered that the button may be activating a GLOBAL RELAY located some where else A reading of the BUTTON CHECK function would reveal this operation PRESET OPERATION The PRESET buttons are a special type of button Normally other buttons are assigned to the PRESETs and their function is to operate those other buttons as if they were pressed The logical action of

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