TELEX RTS MS-4002 4-Channel Main Station for Wired Intercom System

  • $799.00

  • Brand: Telex
  • Model Number: MS-4002
  • Product Code: BS18896
  • Availability: In Stock
  Usually dispatched in 2-4 working days

The TELEX RTS MS-4002 is a complete 4-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’re ready to communicate.

The TELEX RTS 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-inch equipment rack and is 1 rack unit high. The MS-4002 is Clear-Com compatible, with the ability to run in unbalanced mode.

Technical Details


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

Dimensions: 1.75” (44.5 mm) high, 19” (483 mm) wide,

10.31” (261.9 mm) deep
Weight: approximately 4.5 lb (2 kg) Environmental Requirements:

Storage: -20°C to 80°C; 0% to 95% humidity, non-condensing
Operating: -15°C to 60°C; 0% to 95% humidity, non-condensing

Dynamic-mic Headset
Microphone: 50 to 200 Ω, dynamic (balanced or unbalanced) Headphones: 150 to 600 Ω, 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 (+5 VDC)

Nominal Level: -42 dBu
Maximum Level: -25 dBu
Connector Type: IKP12 (MCP-90 series, stereo plug connector)

Program Input
Input Level: 100mV maximum
Voltage Gain: 25 ±3 dB
Output Level (to intercom channel) :1.0 Vrms nominal, 2.3 Vrms max.

Input Impedance: 75 k
Common Mode Rejection: Greater than 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: 300 Ω
Bridging Impedance: greater than 10,000 Ω
Sidetone: -40 dB, 35 dB adjustable range
Call Signaling:


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