RTS MS-2002 2-Channel User/Main Station

The US-2002 intercom user station is designed for stationary use by personnel who may require selective access to two intercom channels. It can be rackmounted or used as a desktop station. For rackmounting, optional hardware is required. For desktop use, four rubber feet are supplied.

RTS MS-2002 Features

• 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 headsets 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
• Binaural (Stereo) Listening with External Powered Speakers
• You can connect external powered speakers and then monitor channel 1 and 2 as separate right and left audio.

• MS-2002 2-Channel User/Main Station1

• Power Requirements
  • Phantom Power: 24 VDC nominal (18 to 30 VDC), 65 to 150mA
  • Local Power: 15 VDC, 65 to 150 mA
  • Dimensions: 1.75” (44.5 mm) high 8.25” (209.5 mm) wide 10.31” (261.9 mm) deep
  • Weight: approximately 2lb (0.9 kg)
• 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: Mic low
  • Pin 2: Mic high
  • Pin 3: Headphone low
  • Pin 4: Headphone high
• Panel Microphone or Electret-mic Headset
  • Microphone: 5kΩ, electret (-57 dB)
  • Headphones: 150 to 600Ω, monaural
  • Connector Type: IKP12 (MCP-90 series, stereo plug connector)
• Program Input
  • Input Level: 100mV maximum
  • Voltage Gain: 25 ±3 dB
  • Output Level : 1.0 Vrms nominal, 2.3 Vrms maximum
  • Input Impedance: 75kΩ
  • Common Mode Rejection: >50 dB
  • Connector Type: DB9F
  • 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 (SW2 set to BAL position)
  • Output Level: 1 Vrms nominal
  • Input Impedance: 300Ω
  • Bridging Impedance: >10kΩ
  • Sidetone: 35 dB adjustable range
  • Call Signaling
    • Send: 20 kHz ±100 Hz, 0.5 Vrms ±10%
    • Receive: 20 kHz ±800 Hz, 100 mVrms
  • Mic-Kill Frequency
    • Send: 24 kHz ±300 Hz, 0.5 Vrms ±10%
    • Detect: 24 kHz ±800 Hz, 100 mVrms
  • Noise Contribution: <-70 dB
  • Common Mode Rejection Ratio: >50 dB
  • Connector Type: One XLR-3M and XLR-3F pair, wired in parallel, for each channel
  • Pin 1: Common
  • Pin 2: Intercom audio low and +24 VDC input
  • Pin 3: Intercom audio high and +24 VDC input
• Intercom Channel, Unbalanced Mode (SW2 set to UNBAL position)
  • Output Level: 1 Vrms ±10%
  • Input Impedance: 200Ω
  • Bridging Impedance: >10k ohms
  • Call Signaling
    • Send: 11 ±3 VDC
    • Receive: 4 VDC minimum
  • Connector Type: One XLR-3M and XLR-3F pair, wired in parallel, for each channel
  • Pin 1: Common
  • Pin 2: +24 VDC input
  • Pin 3: Intercom audio high
  • PA Output
    • Output Level: 235 mVrms nominal
    • Connector Type: 3.5mm Stereo Phone Jack
    • Tip: PA output high
    • Ring: Not used
    • Sleeve: Common
  • Speaker Output
    • Output Level: 1.0 Vrms
    • Output Impedance: 1kΩ nominal
    • Frequency Response: 200 Hz to 8 kHz +1/-3dB
    • Connector Type: RCA Phono Jack
    • Tip: Speaker output high
    • Sleeve: Common
  • Expansion Input /Output Type: 3.5 mm stereo phone jack
    • Tip: Talk output
    • Ring: Listen input
    • Sleeve: Common
  • External Power
    • Type: 3.5 mm power jack
    • Internal pin: positive (+)
    • External shell: negative (-)
  • Headphone Amplifier
    • Voltage Gain: 30 ±3 dB
    • Maximum Output: 250 mW ±10% into 150Ω, 65 mW ±10% into 600Ω
    • Frequency Response: 200 Hz to 8 kHz +1/-3db
    • Incoming Call Beep Tone: 2 kHz, at the headphones
    • Total Harmonic Distortion: < 0.2% at 200 mW
    • Sidetone: 18 ±2 dB, adjustable
• Panel Microphone Amplifier
  • Voltage Gains:
    • Mic to CHN 25±3 dB, before limiting
    • Mic to Headphone; adjustable, 45 dB ±10% maximum, into 150Ω
    • Mic to PA; 15 ±3 dB, 235 mVrms ±10%
    • Frequency Response: 200 Hz to 8 kHz +1/-3dB
    • Total Harmonic Distortion: < 0.2% at CHN output
    • VOX Range: -75 to -30 dB, -60 dB factory set