CLEAR-COM ENCORE MS-704 FOUR-CHANNEL MAIN STATION RM-704 FOUR-CHANNEL REMOTE STATION INSTRUCTION MANUAL
MS-704/RM-704 Four-Channel Main/Remote Stations Instruction Manual Part Number 810345Z Rev. 3 Legal Disclaimers All Rights Reserved Copyright © 2013 HME Clear-Com Ltd. Clear-Com, the Clear-Com logo, and Clear-Com Concert are trademarks or registered trademarks of HM Electronics, Inc. The software described in this document is furnished under a license agreement and may be used only in accordance with the terms of the agreement.
CONTENTS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 The Clear-Com Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Understanding the MS-704/RM-704 Main and Remote Stations . . . . . . . . 1-2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Option Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 IFB Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Run/Test Mode Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Program Audio Feed to Announce Output Jumper . . . . . . . . . . . . . . 2-12 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Introduction . . . . . . . . . . . . . . . . . . .
IMPORTANT SAFETY INSTRUCTIONS Please read and follow these instructions before operating this product. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Read these instructions. Keep these instructions. Heed all warnings. Follow all instructions. Do not use this apparatus near water. Clean only with dry cloth. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol alerts you to the presence of uninsulated dangerous voltage within the product's enclosure that might be of sufficient magnitude to constitute a risk of electric shock. Do not open the product's case. This symbol informs you that important operating and maintenance instructions are included in the literature accompanying this product.
OPERATION INTRODUCTION Clear-Com manufactures a wide variety of both portable and fixed installation units. All are compatible with each other. Congratulations on choosing this Clear-Com product. Clear-Com was established in 1968 and remains the market leader in providing intercoms for entertainment, educational, broadcast and industrial applications. The ruggedness and high build-quality of Clear-Com products defines the industry standard.
Clear-Com main stations, power supplies and certain remote stations each have 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 all main and remote stations, allows the user to attract the attention of operators who have removed their headsets.
The MS-704 is a four-channel main station that contains a no-fail system power supply. The RM-704 is a four-channel remote station intended to be powered from the intercom line. The following is a list of features found in the MS-704 and RM-704 intercom stations: • MICROPROCESSOR CONTROL: Most aspects of station operation are under microprocessor control. • REMOVABLE ACCESS PANEL: A removable access panel allows access to most controls and option DIP switches.
• EXTERNAL IFB and HOT MIC OUTPUT: A rear panel jack provides direct connection to Clear-Com’s external IFB system such that the station’s microphone can be used in the external IFB system. A buffered unswitched output of the selected microphone is also available. • SPEAKER ON/OFF SWITCH: The speaker may be turned on and off with a front panel switch. • SPEAKER DIMMING: Whenever a talk is active, the speaker output is dimmed approximately 6 dB to prevent feedback.
• Listening to intercom channels • Monitoring main program • Talking on intercom channels • The all-talk function • Sending and receiving call signals • Linking intercom channels together (MS-704) • The announce function Intercom Power Status Lights (MS-704) The four red short lights are failure indicators for each of the four intercom lines. These lights will assist in locating a shorted or overloaded channel.
If several channels are being listened to at the same time, it might be desirable to adjust the individual listen levels of each channel for the desired mix. Talking on Intercom Channels To talk on an intercom channel, press the desired talk button. Pressing and holding the button will cause the function to be active only while the button is held (momentary). Pressing and releasing the button quickly will cause the function to latch on if it was off or turn off if it was on (latching).
listen latches are not reset, but the microphone’s audio does not go to the intercom line while the announce function is active. A set of relay contacts are activated to control some external device. There is an option which allows program audio to be fed to the announce output. If this option is enabled, the announce pushbutton interrupts this audio when it is pressed. Program audio feed to the announce output is selected by setting jumper J11 on the main board to the on position.
• AUTO-TALK/LISTEN: Four DIP switches (one for each channel) enable automatically setting the listen function whenever a talk is active on the enabled channel. • TALK LATCH DISABLE: Four DIP switches (one for each channel) disable the latching action of the selected channel. • PROGRAM ON/OFF: Four DIP switches (one for each channel) enable feeding the main program input to the selected intercom channel. The main program input is the one on the XLR-3F on the rear panel.
3. Repeat the adjustment for all four channels on the station. 4. Adjust the sidetone adjust control for the desired amount of sidetone in the headset. • CHANNEL PROGRAM FEED LEVEL: Beside the null control for each channel there is a control marked PGM, which adjusts the amount of program being sent to that channel. Each channel has two program sources: 1.
unplug the intercom line connected to the affected channel and its red “short” light should go out. This indicates that there is a short in that line. Follow that intercom line and break it apart in several places while it is plugged into the station to isolate the section of line that is shorted. SUMMARY OF FRONT-PANEL LIGHTS Table 1 summarizes the meaning of various front-panel key colors.
a button the feature switches on, and when you release the button the feature switches off. This is called “momentary” use.
1-12 MS-704/RM-704 FOUR-CHANNEL MAIN/REMOTE STATIONS
INSTALLATION This chapter discusses how to install the MS-704 and RM-704 intercom stations in an intercom system. INSTALLATION OVERVIEW This section describes the Clear-Com concept of intercom line interconnection. The following subjects are discussed: • Intercom line connection • Line termination • Station powering • Cable considerations Intercom Line Connection The MS-704 provides two male XLR-3 connectors for each intercom line.
FAIL-SAFE POWER An intercom power supply has special needs that are not met by traditionally designed power supplies. An intercom power supply must work in adverse conditions such as low AC line voltage, momentary shorts on the DC power lines to the stations, and excessive peak loads during “power-on”conditions. The following features are incorporated into the MS-704’s power supply: • AUTOMATIC SHORT CIRCUIT PROTECTION: The MS-704’s internal power supply checks each channel for a short or current overload.
limited to 2 amperes. A short on any one intercom line will not bring the whole system down. Note: Power supply lines connected together at remote stations will disable the individual channel short circuit protection feature. • FRONT PANEL “SHORT” LIGHTS: There are four short lights on the front panel (one for each channel). The short lights illuminate steadily when an overload or short condition is detected. They blink if power to a channel has been shut off as a result of an overload or short.
FAIL SAFE POWER DISTRIBUTION SCHEME WITH SINGLE-CHANNEL REMOTE STATIONS MS-704 Main Station 2 Amp Power Supply R BELT PACK BELT PACK BELT PACK BELT PACK BELT PACK BELT PACK BELT PACK BELT PACK Ch A Ch B R Ch C Ch D THE 4 POWER LINES ARE NOT CONNECTED Wall Station Wall Station Wall Station Wall Station Wall Station Wall Station Wall Station Wall Station R R +30 Volts for each Intercom Line Figure 2-5: Stations Powered by Individual Channels The illustration above shows the proper po
J16 1 2 3 4 5 6 Placing jumper plug over pins 1 and 2 connects channels A and B Placing jumper plug over pins 3 and 4 connects channels B and C Placing jumper plug over pins 5 and 6 connects channels C and D Figure 2-6: J16 Six-Pin Jumper 5. Continue placing pins until all desired channels are connected. 6. Replace the cover of the RM-704.
is affected by blinking the red short light(s) corresponding to these channel(s). This light will assist in locating the shorted or overloaded channel. Shorts are generally caused by miswiring or damaged cables. Overloads are generally caused by connecting too many beltpacks and stations to a channel. The current requirements of Clear-Com remote stations and beltpacks vary with model and use. A station that is simply on and idling in the circuit may draw only a small amount of current.
GROUND ISOLATION The pin #1 ground connection of each XLR connector must also be isolated from the chassis. Pin #1 should not be connected to the shell of the XLR connector. Figure 2-8: Interconnect Cable Detail Note: The remote stations connected to each channel are powered from the intercom cable for that channel. In the case above, a short on any one line will only take that channel down.
CHANNEL A CHANNEL B CHANNEL C CHANNEL D PROGRAM IN AUX HOT MIC/IFB RM-704 ANNOUNCE OUT Class 2 Wiring RM-704 On On Off Off CHANNEL B CHANNEL A Term On On Off Off PROGRAM IN WARNING: MS-704 TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. HOT MIC/IFB AUX CAUTION: TO PREVENT ELECTRIC SHOCK DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER TO QUALIFIED SERVICE PERSONNEL. CHANNEL C CHANNEL D ANNOUNCE OUT Output: 30V 1.
long. The microphone is of the electret type. The microphone has a built-in ¼ in. (0.64 cm) phone jack for a connector. A proprietary mating receptacle is mounted on the station. To install a GM-9 or GM-18 panel mount microphone, use the following steps: 1. Check the set screw in the mic mounting flange to make sure it is clear of the threads in the bushing. 2. Screw the microphone into the bushing hand tight. 3. If desired, set the set screw on top of the bushing to lock the mic in place.
ANNOUNCE OUTPUT (REAR PANEL) An XLR-3M connector provides the announce output from the station. Whenever the announce button on the front panel is pressed, the selected microphone is sent to the announce output and the announce relay is activated. Simultaneously, if the program audio feed to the announce output is enabled, it is interrupted by the announcement. Program audio feed to the announce output is selected by setting jumper J11 on the main board to the on position.
Figure 2-10: Accessory Connector • AUXILIARY PROGRAM INPUTS: Four different program inputs, one for each channel, are provided. These auxiliary program inputs can only be fed directly to their associated intercom line. The only controls that affect these inputs are the PGM-level controls associated with each channel and the internal program interrupt switch that is active if the function has been activated with an option DIP switch and a talk is active on that channel.
INTERNAL OPTION JUMPERS There are several jumper options inside the chassis of the MS-704 and RM-704. CAUTION:Remove AC power from the unit before removing the top cover. The following options are available: • IFB operation mode select • Run/test mode jumper • Program audio feed to announce output IFB Mode The MS-704 and RM-704 support two different modes of operation for the internally generated IFB function.
MS-704/RM-704 FOUR-CHANNEL MAIN/REMOTE 2-13
2-14 MS-704/RM-704 FOUR-CHANNEL MAIN/REMOTE
MAINTENANCE INTRODUCTION This chapter provides maintenance information, including a block diagram and troubleshooting tips. Caution: These servicing instructions are for use by qualified personnel only. To reduce the risk of electrical shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so.
Figure 3-11: MS-704 Block Diagram RM-704 BLOCK DIAGRAM 3-2 MS-704/RM-704 FOUR-CHANNEL MAIN/REMOTE STATIONS
Figure 3-12: RM-704 Block Diagram MS-704/RM-704 FOUR-CHANNEL MAIN/REMOTE STATIONS 3-3
3-4 MS-704/RM-704 FOUR-CHANNEL MAIN/REMOTE STATIONS
TECHNICAL SPECIFICATIONS MS-704/RM-704 FOUR-CHANNEL STATIONS dBu is an absolute measurement. 0 dBu is referenced to 0.
Output Impedance Load Impedance IFB/Hot Mic Type Output Impedance Load Impedance Frequency Response Panel Mic - Party Line Headset Mic - Party Line Headset Mic - Line Out Program Input - Party Line Program Input - Headset Out Program Input - Speaker Out Party Line - Headset Out Party Line - Speaker Out Max Distortion Panel Mic - Party Line Headset Mic - Party Line Headset Mic - Line Out Program Input - Party Line Program Input - Headset Out Program Input - Speaker Out Party Line - Headset Out Party Lin
Min Gain Panel Mic - Party Line <= 25dB Mains Power (MS-704) Input Voltage Range Input Frequency Range Input Power Output Voltage Output Current per Channel (Continuous) Output Current per Channel (Peak) 100 - 240 VAC 50 - 60 Hz <= 60 VAC 30 VDC ± 0.5V 1.2 A 2 A (Do not exceed the 1.2A rating for more than 2 seconds per 1 minute period) Short Circuit Recovery Time (1st short) <= 0.
Front Panel Controls & Indicators (MS-704) (1) Panel / headset mic switch (1) Mic on button (1) All talk button (1) Announce button (1) Party line link button (4) Program ON-OFF-INTERRUPT DIP switches (1) Program level control (4) Listen adjust controls (4) Channel null adjust controls (4) Channel program feed adjust controls (4) Talk buttons (4) Call buttons (4) Listen buttons (1) RMK button (1) Speaker ON-OFF switch (1) Speaker volume control (4) Short LEDs (1) Panel mic gain control (1) Sidetone adjust
(1) Sidetone adjust control (1) Headset audio limiter DIP switch (3) Interrupt enable DIP switches (4) Auto-call DIP switches (4) Auto-talk/listen DIP switches (4) Talk latch disable DIP switches (4) Line length DIP switches Environmental Dimensions (MS-704/RM-704) Weight MS-704 RM-704 32 - 122o F (0 - 50o C) 19 in. W x 3.5 in. H x 10.5 in. D (483 mm x 88 mm x 267 mm) 10.86lbs. (4.94 kg) 10.07lbs. (4.
4-6 MS-704/RM-704 FOUR-CHANNEL MAIN/RE-
LIMITED WARRANTY Clear-Com offers 24 x 7 customer support if you have an Extended Warranty or Service Contract. Return Material Authorization (RMA) numbers are required for all returns. Both warranty and non-warranty repairs are available. Clear-Com warrants that at the time of purchase, the equipment supplied complies with any specification in the order confirmation when used under normal conditions, and is free from defects in workmanship and materials during the warranty period.
period will be offered at no charge between 09:00 and 17:00 according to the customer’s local time zone. In addition, for customers who purchase an Extended Warranty or Service Contract, 24-hour customer support is offered immediately upon purchase of such agreement. For more information, contact your authorized dealer, distributor, or sales representative. Instructions for reaching Clear-Com’s User Support Centers are given below. Americas and Asia-Pacific Headquarters California, United States Tel: +1.
China Office Beijing Representative Office Beijing, P.R.China Tel: +8610 65811360 / 65815577 Clear-Com has the right to inspect the equipment and/or installation or relevant packaging. NON-WARRANTY REPAIRS AND RETURNS For items not under warranty, you must obtain an RMA by contacting the User Support Center. Clear-Com representatives will give you instructions and addresses for returning your equipment.
OTHERWISE, WITH RESPECT TO THE PRODUCTS OR ANY PART THEREOF DELIVERED HEREUNDER, OR FOR ANY DAMAGES AND/OR LOSSES (INCLUDING LOSS OF USE, REVENUE, AND/OR PROFITS). SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES OR THE LIMITATION ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.
