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)
- 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)
