RTS MS-4002 4-Channel User/Main Station

The RTS 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.

RTS MS-4002 Features

• Auto-Sensing Headset Connector
• Speaker Station or Headset Station
• Voice Activated Microphone (VOX)
• Public Address (PA) Output, with PA key
• Back-lit Keys
• Incoming Call Indications
• Mic Kill Key
• Program Input for Each Channel
• Listening with External Powered Speakers
• Expandable
• Instantaneous Auto-Reset
• Clear-Com Compatible

• MS-4002 4-Channel User/Main Station1

• Power Requirements
  • AC Input: 100-240VAC, 50/60Hz
  • Channel Power
    • 24VDC nominal (18 to 30VDC), 65 to 150mA
    • MS-4002 is capable of supplying 3.6A overall
  • Dimensions (HxWxD): 1.75x19x10.31” (44.5x483x261.9mm)
  • Weight: approximately 4.5lb (2kg)
  • Environmental Requirements
    • Storage: -20°C to 80°C; 0% to 95% humidity, non-condensing
    • Operating: -0°C to 50°C; 0% to 95% humidity, non-condensing
• Dynamic-mic Headset
  • Microphone: 50 to 200Ω, dynamic (balanced or unbalanced)
  • Headphones: 150 to 600Ω, monaural
  • Connector Type: XLR-4M
  • Pin 1: Microphone low
  • Pin 2: Microphone high
  • Pin 3: Headphone high
  • Pin 4: Headphone low
• Panel Microphone Input
  • Microphone Type: Electret condenser
  • Power: Phantom (+5VDC)
  • Nominal Level: -42dBu
  • Maximum Level: -25dBu
  • Connector Type: KP12 (MCP-90 series, stereo plug connector)
• Program Input
  • Input Level: 100mV maximum
  • Voltage Gain: 25 ±3dB
  • Output Level (to intercom channel): 1.0Vrms nominal 2.3Vrms max.
  • Input Impedance: 75k
  • Common Mode Rejection: >50 dB
  • Connector Type: 9-pin female D-sub (DE9S)
  • Pin 1: Ground
  • Pin 2: Program 1 input low
  • Pin 3: Program 2 input low
  • Pin 4: NC
  • Pin 5: NC
  • Pin 6: Program 1 input high
  • Pin 7: Program 2 input high
  • Pin 8: NC
  • Pin 9: NC
• Intercom Channels, Balanced Mode (Both Back Panel and internal switches (BAL/UNBAL) must be set to same setting) Output Level: 1 Vrms nominal
  • Input Impedance: 300Ω
  • Bridging Impedance: >10kΩ
  • Sidetone: -40dB, 35dB adjustable range
  • Call Signaling
    • Send: 20kHz ±100Hz, 0.5Vrms ±10%
    • Receive: 20kHz ±800Hz, 100mVrms
    • Mic-Kill Frequency
      • Send: 24kHz ±300Hz, 0.5Vrms ±10%
      • Detect: 24kHz ±800Hz, 100mVrms
    • Noise Contribution: < -70dB
      • Common Mode Rejection Ratio: >50dB
      • Connector Type: One XLR-3M and XLR-3F pair, wired in parallel, for each channel (permits “loop-thru” connection).
• XLR-3 Balanced Configuration Pinouts
  • Pin 1: Common
  • Pin 2: Intercom audio low and +24VDC input
  • Pin 3: Intercom audio high and +24VDC input
• Intercom Channel, Unbalanced Mode (Both Back Panel and internal switches (BAL/ UNBAL) have to be set to same setting)
  • Output Level: 1Vrms ±10%
  • Input Impedance: 200Ω
  • Bridging Impedance: >10kΩ
  • Call Signaling
    • Send: 11 ±3VDC
    • Receive: 4VDC minimum
    • Connector Type: Uses same connectors as for balanced mode, above, but with pinouts modified by BAL/UNBAL switch on back panel as follows:
      • XLR-3 Unbalanced Configuration Pinouts
        • Pin 1: Common
        • Pin 2: +24VDC input
        • Pin 3: Intercom audio high
      • PA Output
        • Output Level: 235mVrms nominal
        • Connector Type: ⅛-inch Stereo Phone Jack
        • Tip: PA output high
        • Ring: Not used
        • Sleeve: Common
      • Speaker Output
        • Output Level: 0 dB nominal (1.0Vrms)
        • Output Impedance: 1000Ω nominal
        • Frequency Response: 200Hz to 8kHz +1/-3dB
        • Connector Type: RCA Phono Jack
        • Tip: Speaker output high
        • Sleeve: Common
      • Expansion Input /Output
        • Type: 2.0 mm stereo phone jack
        • Tip: Talk output
        • Ring: Listen input
        • Sleeve: Common
      • Headphone Amplifier
        • Voltage Gain: 30 ±3dB
        • Maximum Output: 250mW ±10% into 150Ω, 65mW ±10% into 600Ω
        • Frequency Response: 200Hz to 8kHz +1/-3db
        • Incoming Call Beep Tone: 2kHz, at the headphones
        • Total Harmonic Distortion: Less than 0.2% at 200mW
        • Sidetone: 18 ±2dB, adjustable