Four-channel user/main station with 4.0 amp power supply

  • Auto-Sensing Headset Connector

    The MS-4002 has a built-in autosensing headset connector that will determine automatically whether a dynamic or electret headset is connected to the system.

    Speaker Station or Headset Station

    Use the built-in speaker for listening and add an optional MCP-90 series Gooseneck Panel Microphone for talkback. You can also turn off the speaker volume, and plug in a headset for private communication.

    Voice Activated Microphone (VOX)

    Separate controls adjust the voice activation level for the headset microphone and panel microphone inputs.

    Public Address (PA) Output, with PA key

    Use your intercom microphone to talk over a PA system.

    Back-lit Keys

    Improves visibility in low-light

    Incoming Call Indications

    Red flashing call light, with beep tone if desired.

    Mic Kill Key

    You can turn off all microphones on a channel to quickly clear the channel.

    Program Input for Each Channel

    Connect any line-level audio source for monitoring in the speaker or headset, or for routing to the intercom channel. The program audio to the channel can be set to interrupt while the MS-4002 operator is talking on the channel.

    Listening with External Powered Speakers

    You can connect external powered speakers and then monitor channels 1, 2, 3 and 4.


    Add more channels by connecting optional EMS-4001 Expansion Stations. Each EMS-4001 adds four additional powered channels (up to twenty channels).

    Instantaneous Auto-Reset

    Instantaneous Auto Reset (IAR), the newest technology in performance and safety, which uses a revolutionary new circuitry that dynamically monitors line fault conditions. Then, when the fault is removed, automatically brings individual power supply channels up.

    Clear-Com Compatible

    Can run in unbalanced mode.

    This product is not CE certified.

The MS-4002 is a complete four-channel, balanced audio master station and 4 amp system power supply in a single unit. You simply plug it into any AC power outlet from 100 to 240 volts, add a microphone or headset, connect intercom stations to the back panel, and you are ready to communicate. The MS-4002 is now equipped with an advanced programming mode on the front panel, eliminating the need for internal DIP switches. It also has a feature that automatically senses the type of headset attached to the unit, either dynamic or electret. The MS-4002 fits in a standard 19" equipment rack and is 1 rack unit high. The MS-4002 is Clear-Com compatible, with the ability to run in unbalanced mode.


Power Requirements AC Input: 100-240 VAC, 50/60 Hz, Channel Power: 24 VDC nominal (12 to 30 VDC), 65 to 150 mA MS-4002 is capable of supplying 4 amps overall
Channels 4


Name Size Date
Audiocom Based Training Intercom System 35KB Nov 6, 2014
Audiocom Basic Intercom Application Guide 438KB Nov 6, 2014
Audiocom Intercom Concept 39KB Nov 6, 2014
Generic Single-Channel Audiocom System 35KB Nov 6, 2014
RTS Application Guide 14.92MB Apr 17, 2019
RTS Proper Cleaning Guidelines 91KB Jun 9, 2020
Name Language Size Date
RTS full-line catalog EN 8.56MB Jan 29, 2020
Name Language Size Date
MS-4002 Technical Data Sheet EN 799KB Nov 6, 2014

MS-4002 Iso

MS-4002 Back

MS-4002 Front

Name Language Size Date
MS-4002 User Manual EN 1.03MB Apr 21, 2016
Name Language Size Date
Warranty conditions for RTS products in North America EN 159KB Sep 14, 2020
General Terms & Conditions of Deliver for Export Business EN 57KB Nov 26, 2014
Allgemeine Lieferbedingungen DE 184KB Nov 30, 2016
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