Rauland Mcc100 Series Communications Control Panels 电路图.pdf

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1、c KI-1174-B DIRECTOR SERIES COMMUNICATIONS CONTROL PANELS MODELS MCCl00, MCCl00A AND MCClOOB FOR SCHOOL SOUND/COMMUNICATIONS SYSTEMS 1 1 RAULAND-BORG CORPORATION ? 3535 West Addison Street, Chicago, Illinois 60618 (312) 267-1300 CONTENTS Section Page Model Variations . 2 Specifications.,. 2 1. DESCR

2、IPTION . 3 2. 3. 4. 5. 6. 7. INSTALLATION . INITIAL ADJUSTMENTS AND LEVEL SETTINGS . OPERATING INSTRUCTIONS . THEORY OF OPERATION . MAINTENANCE . UNIQUE ITEMS PARTS REPLACEMENT LIST . 4 6 7 9 15 16 Limited Warranty Diagram Communications Control Panel Schematic Diagram.KC-1303 1978 RAULAND-BORG CORP

3、. PRINTED IN U.S.A. l0/78 PAGE 1 OF 17 RadioFans.CN 收音机爱 好者资料库 M O D E L V A R I A T I O N S Model MCClOOA uses the same circuit board as the earlier MCClOO Model, but includes an improved TALK/LISTEN switch. Model MCClOOB includes resistorR119 in the talk enable circuitry to accommodate operation w

4、ith the optional VC-6380 Beep Adder. Except for these changes, all infor- mation provided in this instruction manual for the MCCl00 Model is fully applicable to the MCClOOA and MCClOOB Models. S P E C I F I C A T I O N S Rated Output: Frequency Response: 10 watts rms Shaped for maximum intelligibili

5、ty; Approximately 800 Hz to 10 kHz Distortion: Talk Noise Level: -50 dB Type of Output: Balanced 25-volt line Compression Amplifier: RANGE: 20 dB ATTACK TIME: RELEASE TIME: Supervisory Tone (Listen Mode Only): Source Required: Unit Size: Less than 5% 10 msec 1.5 sec DURATION: lOO 20 msec REPETITION

6、R A T E Every 15-20 sec FREQUENCY: Approximately 1.5 kHz 28 Vdc 19 panel x 3 high x 7% deep SPECIFICATIONS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE PAGE 2 RadioFans.CN 收音机爱 好者资料库 - Classroom personnel are alerted to the listening condition a brief tone signal which is sent every 15 to 20 sec to the mo

7、nitored classroom. - Compatible with selective privacy operation.Classrooms equipped with a PRIVACY or PVCY switch may prevent classroom monitoring. Calls from the console are always heard in the by 1. DESCRIPTION 1.1General The Model MCClOO Communications Control Panel provides the communications (

8、intercom) channel for the Rauland DIRECTOR Series School Sound/Communications System. Instant monitoring and two-way communications can be obtained with any classroom. The room is selected at the associated room selector switch panel(s). The communications control channel is designated the ORANGEC c

9、hannel. Simplified equipment operation is assured by using the orange color on all communications related equipment panels,and having step-by-step operating instructions screened on the communications control panel. 1.2 Features The communications control panel provides the following features: - Sta

10、te-of-the-art circuitry using integrated circuits for logic switching and some audio amplification stages. This minimizes power consumption, increases reliability, and reduces maintenance costs. - Fast acting compression amplifier with 20 dB dynamic range assures optimum operation under widely varyi

11、ng listen and talk input levels. This allows input levels to be preset during the equipment installation eliminating the need for volume controls and their constant readjustment. - Amplifier output power rated at 10 watts rms into a balanced 25-volt line provides ample power for talking to 20 rooms

12、simultaneously. - Isolated listen and talk inputs to the compression amplifier using computer-grade reed relays. This prevents cross-talk and gives system operational priority to the communication control panel (console) operator. - Simple equipment operation using PUSH-TO-TALK/RELEASE-TO-LISTEN swi

13、tch and front-panel mounted speaker/microphone obtains two-way communications with classroom. No level adjustments are required by the equipment operator. selected classroom(s) regardless of the privacy switch position. -3- - Compatible with voice call operation. A separate voice call circuit may be

14、 used allowing direct calls to the console operator from the classroom, bypassing selections made at the room selector switch panel. - Provisions for ready field addition of the Rauland Model CCPlOO Administrative Expander Kit. This kit allows administrative communications system operation with up t

15、o three Rauland Model MDClOO Administrative Centers. - Operating power obtained from the common +28 Vdc power source used for theDIRECTOR Series equipment. 1.3 Optional Call Origination Switches There are several different call origination switches available as optional items for the DIRECTOR Series

16、 School Sound/ Communications Systems. Select theswitch that best suits the specific classroom requirements for your system from the following list: RAULAND ANNUNCIATOR MODEL METHOD OS10 Voice or Visual OS11 Voice or Visual 2304F-A Visual 2307 Visual 2302S - 2. INSTALLATION 2.1 Introduction The Comm

17、unications SWITCH TYPE 3-position Locking Spring return Momentary lever from call 2-position - Spring return Momentary lever from call Pushbutton - - - - - - - - Momentary 3-position Locking Spring return Momentary rocker from call Rotary control panelis available either as a factory installed item,

18、completely prewired and tested as an in- tegral part of a DIRECTOR Series School Sound/Communications System,or separately for field installation into an existing sound system. Sufficient information is provided to do a typical field installation. Not every application or interface problem is descri

19、bed. The intraunit connections between the communications control panel and the items that comprise a DIRECTOR Series System are shown on the wiring diagram in the instruction manual provided with either the Model MCAlOO or MCBlOO Master Control Panel. SWITCH POSITIONS AND ACTION PRIVACY NORMAL CALL

20、 - L locking T locking -4- 2.2Equipment Damaged in Transit the This equipment has been carefully inspected and tested at factory prior to shipment. If the equipment was damaged in transit, notify the transportation company immediately to place your claim. 2.3 Mounting Communication Control Panel (Fi

21、eld Installation Only) The communications control panel may be mounted in any standard 19-inch rack. The minimum space requirements are: 3 high by 7 deep. Remember that sufficient open space must be kept behind the chassis for making equipment connections and to allow accessibility for equipment mai

22、ntenance. Mount panel as follows: Step 1. Secure chassis to the rack with screws through the four mounting holes provided. It is recommended that l0-32 or larger hexagon head screws be used. Rauland supplied racks require l0-32 x 3/8 self-locking screws,and turrets require 10 x 3/8 sheet metal screw

23、s and 10-2 Tinnerman-type nuts. The mounting hardware is supplied with the equipment. Step 2. Install front panel on chassis using the two 6-32 x 3/8 binder head screws supp1ied. 2.4 Intraunit Wiring Check List (Communications Control Panel) Use the following check list to verify that factory instal

24、led wiring is intact,and as a guide for making connections in the field. MCClOOB Terminal B Function Connect To Present(d) None Not Used Cl CZ c2 P 4 Z M T Y Audio In/Out * TP Cable Shield MCRlOOA; Term 17 MCRlOOA; Term 13 Audio In/Out MCRlOOA; Term 16 +28 Vdc Input PSX29A or SAX60/lOO None Not Used

25、 Common PSX29A or SAX60/100 +12 Vdc Output Optional Applications Disable Supervisory Tone Optional Applications Beep Enable For VC-6380 SWL25;Term L. -5- 2.5 Connecting Voice Call Oriqination Lines In intercom systems using voice call origination from the classroom,one twisted-pair shielded cable is

26、 looped between all classrooms equipped with voice call origination switches and is connected to the following terminals: MCClOO Termina1 Function Cl Voice Call In cz Cable Shield c2 Voice Call In 2.6 Equipment Grounding In any sound system,the audio common must be connected to the equipment chassis

27、 at some point in the system. To minimize the possibility of ground loops and resultant hum pick-up, it is recommended that only one such connection be made in the entire sound system. For the DIRECTOR Series System, this connection should be made between the switch bank ground buss and terminal 23

28、on the Model MCAlOO Master Control Panel. 3. INITIAL ADJUSTMENTS AND LEVEL SETTINGS 3.1 Introduction Setting levels requires two men: the first man at the communi- cations control panel to make the required adjustment; and the second man at strategically located classrooms to hear the sound, follow

29、voice instructions, and reply as required. One 1.2 k 5%, watt resistor is required when adjusting the INPUT BALANCE - to cancel hum or noise introduced by the speaker lines. 3.2 Input Balance Adjustment Step 1. In a distant classroom have assistant disconnect the speaker and connectone 1.2 k 5%, wat

30、t resistor across the audio line. Step 2. Place appropriate classroom selector switch on the room selector switch panel in C position. Step 3. Adjust INPUT BALANCE control (R105), accessible from the rear chassis,for minimum hum or noise. Step 4. Disconnect the 1.2 k load resistor and reconnect the

31、speaker. Step 5. Place classroom selector switch on the room selector switch panel in OFF position. -6- 3.3 LISTEN LEVEL ADJUSTMENT Step 1. In a distant classroom, have assistant place call origination switch in NORMAL position, if room is so equipped. Step 2. Place appropriate classroom selector sw

32、itch on the room selector switch panel in C position. Step 3. Have assistant talk into the classroom speaker using a normal voice level. Step 4. Adjust LISTEN LEVEL oontrol (R45), accessible from the rear chassis,for the desired monitor speaker volume level. Step 5. Place classroom selector switch o

33、n room selector switch panel in OFF position. 3.4 TALK LEVEL Adjustment Step 1. In a distant classroom, have assistant place call origin- ation switch in NORMAL position, if room is so equipped. Step 2. Place appropriate classroom selector switch on the room selector switch panel in C position. Step

34、 3. Depress and hold the PRESS-TO-TALK/RELEASE TO LISTEN switch. Talk into monitor speaker grille using a normal voice level, Step 4. Adjust TALK LEVEL control (R44), accessible from the rear chassis,forthe desired classroom volume level. Step 5. Place classroom selector switch on the room selector

35、switch panel in OFF position. 4. OPERATING INSTRUCTIONS 4.1 Introduction Two-Way communications(intercom) and/or monitoring can be ob- tained with any classroom selected at the room selector switch panel(s). Immediately upon making the room selection, a brief supervisory tone signal is automatically

36、 sent to the selected classroom alerting classroom personnel of the listening con- dition. The supervisory tone signal is sent every 15 to 20 sec thereafter during classroom monitoring. The PRESS-TO-TALK/RE- LEASE TO LISTEN switch is used with the panel-mounted speaker/ microphone to communicate wit

37、h the selected classroom. No talk or listen level adjustments are made by the console operator, as these are preset during the equipment installation. 7 Instructions for operating with the administration communications system are provided separately with the respective equipment. 4.2 To Monitor Or C

38、all Classroom The classroom may be equipped for selective privacy operation. If bsed,the console operator can not monitor the classroom even though the classroom has been selected. However, the console operator is al- ways able to talk to the classroom personnel. Proceed as follows: Step 1. Place th

39、e desired classroom selector switch on the room se- lector switch panel in the C position. The alerting tone is automat- ically sent immediately upon making the room selection and every 15 to 20 sec thereafter while operating in the listening mode. No class- room sound is heard during these brief tr

40、ansmissions. Step 2. Classroom sound should be heard from the panel-mounted speak- er/microphone. If the classroom sound is not heard and monitoring is required, go to Step 3 and advise classroom personnel to place the call origination switch in its normal position. Upon completion of monitoring, pl

41、ace the classroom selector switch on the room selector panel in the OFF position. Step 3. To talk to classroom personnel,depress and hold the PUSH-TO- TALK/RELEASE TO LISTEN switch while speaking into the speaker/micro- phone using a normal voice level. Step 4. To hear the reply,release the PUSH-TO-

42、TALK/RELEASE TO LISTEN switch. Proceed using this PUSH/RELEASE method until the, conversation is completed. Remember that conversation occurs only in one direction at a time and the console operator can talk-over (override) the classroom,exercising operational priority. Step 5. Upon completion of th

43、e conversation,place classroom selector switch in the OFF position. 4.3 To Answer A Call From Classroom Classrooms may call the console operator using voice or audible/ visual means depending upon the method provided in the intercom system. Voice calls originated in the classroom are heard by the co

44、nsole oper- ator regardless of the room selector switch position. Audible/visual calls originated in the classroom sound a chime and light an annuncia- tor lamp above the respective room selector switch. Then, the console operator selects the respective room and proceeds with the PUSH-TO- talk/RELEA

45、SE TO LISTEN method of communications, described in the preceeding paragraph. PAGE 8 5. THEORY OF OPERATION 5.1 Introduction The circuitry used i n the communications control panel is mainly analog for amplifying the incoming and outgoing intercom audio. Digital circuits are used for listen/talk ope

46、rational mode selection and for relay control. The analog circuits are described using functional signal flow. The digital circuits are described using active and inactive terms. This permits the circuit description to be used for troubleshooting purposes. Transistor and integrated circuit biasing i

47、s not described. This type of information is provided in technical textbooks found in most libraries. Refer to the schematic diagram provided at the rear of this instruction manual for circuit details. 5.2 Communications Channel Audio Amplification 5.2.1 Introduction Communications (intercom) audio

48、amplification is provided by: (1) preamplifier Q5 and compression amplifier IC5 and IC4; and (2) power amplifier Q6, Q7, Qll, Q12, Q9 and Q13. Incoming (listen) audio or outgoing (talk) audio is switched into these amplification stages by the digital gating circuits and the listen/talk relays. In the listen mode, listen relays RY2 and RY3 are energized, and listen analog switch IC6-C is closed. Relay RY2 connects the line transformer listen winding to preamplifier Q5. Relay RY3 connects the power amplifier output to th