Clear-Com MS232 2-Channel Headset/Speaker Main Station

The MS-232 is a one-rack-space, two-channel main station with a regulated 2-amp “fail-safe” power supply, individual channel short-circuit protection, and a versatile intercom monitoring system. It supports two intercom channels with up to 60 headset stations or 20 speaker stations. It features Clear-Com’s excellent speech intelligibility in both high- and low-noise environments.

Features:

• Supports up to 60 headset stations or 20 speaker stations on two channels
• Separate short-circuit protection for each channel
• Dual-action electronic momentary/ latching “talk” buttons
• Program feed to both channels, with selectable “Program Interrupt” (IFB)
• “Call” signal buttons for each channel
• Global “Remote Mic Kill”
• Announce output with relay
• Microphone limiting
• Volume controls for each channel
• Visual and audible “Tone Alert” signaling
• Channels A & B “Link” switch
• Built-in speaker
• Optional gooseneck mic
• External switchable line termination on each channel
• Universal voltage power supply for 90-240 VAC operation

Specifications:

• Headset Microphone Pre-amp:
  • Input Type: Dynamic
  • Impedance: 1 kΩ
  • Input Level: -55 dBV nominal; -10 dBV max.
  • Gain from headset mic to intercom line: +41 dB
• Panel Microphone Pre-amp:
  • Input Type: Electret
  • Input Level: -45 dBv nominal
  • Gain from panel mic to intercom line: +31 dB
• Pre-amp Response Curve:
  • Frequency Response: 250 Hz -12 kHz, contoured for intelligibility
  • Limiter Range: 20 dB
• Headphone/speaker Amplifier:
  • Load Impedance Range: 50 Ω - 2 kΩ
  • Output Level: at least +20 dBv across 600 Ω
  • Distortion: <0.2% THD @ 1 kHz
  • Frequency Response: 200 Hz - 18 kHz, +2 dB
  • Gain from intercom line: +37 dB
  • Power output: 110 dB SPL
• Program Amplifier:
  • (Transformerless, balanced differential input)
  • Input Level: -20 dBv
  • Input impedance: >100 kΩ
  • Frequency response: 150 Hz - 18 kHz, +2 dB
• Termination Impedance: Impedance: 200Ω, switchable
• Rear Controls & Connectors:
  • XLR-F program input; XLR-M announce out; 1/4" phone jack relay out; tone gain control; 1/4" phone jack hot mic out; three (3) paralleled XLR-M intercom outputs, with on/off termination switches, per channel.
  • Option Switches: Momentary Talk; Call on Talk; Announce Interrupt; IFB Interrupt
• Power Supply:
  • Type: Switching, with reset circuitry for each channel
  • Output Voltage: 30 volts DC
  • Output Current: 2.0 amps max, Channel A; 1.75 amps max, Channel B
  • Short Circuit Reset Time: <7 sec.
  • Hum & Noise: <-80 dBv
• Station Capacity:
  • Capacity: 60 headset stations or 20 speaker stations, distributed over both channels
• Dimensions: 19” W x 1.75” H x 6.5” D (483mm x 44mm x 165mm)
• Weight: 5.0 lbs. (2.75 kg)