Clear-Com RM-120A Manuel de service

MS-400AFour-ChannelMain StationINSTRUCTIONand* SERVICE MANUAL1 II Clear-ComI Intercom Systems945 Camelia St. Berkeley, California 94710 510-527-6666*

Il-C. System ArchitectureThe number of ways in which you can set up a four-channel intercomsystem are nearly infinite. However, the "system arch

II-D. System WiringBoth physical and electrical considera- results in a loss of sidetone null attions are involved in determining the remote stations,

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Signalling Configurations in Multi-Channel SystemsIn normal circumstances, the CALL light on a two-channel remote stationlights only when someone sign

Interfacing with Other SystemsClear-Com's Model AC-IOK Universal Interface, Model AC-10H TelephoneInterface, Model 1F4-4 TV Camera Interface, and

"Typical" Four-Channel Intercom SystemsThe diagram on the next page shows a standard Clear-Com system for a"typical" application.

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II-E. Mounting The MS-400AThe MS-400A is designed to mount in a rate, as the front panel extends only astandard 19" rack, using 3.5" vertica

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Il-H. Headsets S fMicsAll headset connectors in Clear-Com gear possibility of acoustic feedback.are the 4-pin, male XLR type. To assureproper level an

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O Il. OPERATION* Ill-A. Quick Operation Guide1. Determine which intercom lines are to be assigned to eachchannel. Plug connecting cable into the appro

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III-B. MS-400A OperationThe controls on the surface of the front as the usual Listen access that buttonpanel are used during normal operation controls

the operator is monitoring. Program buss for sending onto the inter-com lines, and to the station's headsetEach channel's SIDETONE NULL adju

III-C. Special Features: ISO, IFB, and Split-Feed Headset OperationRefer to the printed circuit board dia- only while the designated channel's Ta

IV. TECHNICAL INFORMATIONIV-A. Circuit DescriptionThere are two inputs to the main mic switched to the listen buss directly bypreamp, one for each hea

IV-B. Maintance & WarrantyClear-Com's solid-state intercoms, power Before shipping, we test each unit tosupplies, and interfaces are designed

IV-C. TroubleshootingSymptom Cause RemedySystem non-operable; A. loss of AC power A. plug unit into dependablepower switch not lit or AC sourceB. inte

Symptom Cause RemedyFeedback acoutical A. check sidetone levelsB. check termination (should beonly one per channel)C. volume too high at onestationD.

MS-400A Installation & Operation Manual1. INTRODUCTIONA. Clear-Com Concept ...1 B. MS-400A Description ... 211. INSTALLATIONA. M

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F/N DESCRIPTION CTY PIN DESCRIPTION PTY150048 CAD IOOPF IKV 20% RF CAP I 210002 AAA SiC D3F CONNECTOR 7210013 AAA SW' D4M CONNECTOR 2 210003 AAA

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1. INTRODUCTION1. A. The Clear-Com ConceptClear-Com is a closed-circuit intercom dimmer noise.system that consistently provides high-clarity, two-way

1. B. MS-400A Description?The MS-400A is designed for applications Controls which affect the input andin which a person needs to communicate output at

11. INSTALLATIONIl-A. Maximum Number of StationsThe MS-400A has a maximum output current Consult the graph below. Match the num-capacity of two amps;

Il-B. Cable ConsiderationsThe MS-400A contains 12 XLR-type, 3-pin Portable remote stations such as belt-connectors: two male and one female per packs

0 If you don't use Belden cable, use a cable (such as BELDEN 8723).similar type, with wire gauges andcapacitance as specified in this manual. Sel

Belden Shielded CablesInsulat11on J NMa lo, -Sun9sted iot>'Nom, ofobl ' 401 AWGS Thickness Thickness O.D1 Shited Wotdng; CsP.'Cam. (