User manual
Telex MS-2002 Two-Channel Master Station and

User Manual for Telex MS-2002 Two-Channel Master Station and Power Supply for Wired Intercom Systems

• Product category: Wired Intercoms Telex
• Brand: Telex
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for Telex Wired Intercoms

Product description

• 2-channel main station and system power supply in single unit with 1- and 2-channel connectors (no breakout box required)

• Connect a headset (available separately) to the front panel, or monitor through the built-in speaker; volume is independently adjustable for the headphone output and built-in speaker

• Separate controls adjust the voice activation level for the headset microphone and panel microphone inputs

• PA output with dedicated selector key for intercom announcements over PA system

• Backlit keys for improved visibility in low-lighting environments

• Flashing red light with switchable beep tone indicates incoming calls

• Mic Kill key turns off all microphones on channel to quickly clear the channel

• IAR (Instantaneous Auto Reset) technology dynamically monitors line fault conditions and then automatically brings individual power supply channels up when the fault is removed

• Separate line-level audio source connection for monitoring or intercom channel routing with assignable channel interrupt when operator is speaking

• Stereo monitoring available with RCA connectors to powered speakers for independent left/right listening to both channels

• Communicate with two intercom channels, or add up to four EMS-4001 four-channel expansion stations (available separately) for a total of 18 channels

• Supplies 24 VDC (2A) total power

• Compatible with ClearCom

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Technical parameters

Telex F.01U.118.755 Specs

Headset Connectors	1 x 4-Pin XLR Male for Dynamic Headset 1 x 1/4" TRS Stereo for Electret Headset
I/O Connectors	2 x 3-Pin XLR Female for 1-Channel Intercom Stations 2 x 3-Pin XLR Male for 1-Channel Intercom Stations 1 x 6-Pin XLR Female for 2-Channel Intercom Stations 1 x 6-Pin XLR Male for 2-Channel Intercom Stations 1 x DE-9 Female Program Input 2 x RCA Coaxial Speaker Outputs 1 x 1/8" / 3.5 mm TRS PA Output 1 x 0.1" / 2 mm TRS Expansion I/O
Input Level	Program Input: 2.3 Vrms Maximum, 1 Vrms Nominal Panel Microphone Input: -25 dBu Maximum, -42 dBu Nominal
Output Level	Program Out (to Intercom Channel): 2.3 Vrms Maximum, 1 Vrms Nominal Intercom Channels (Balanced Mode): 1 Vrms Nominal Intercom Channels (Unbalanced Mode): 1 Vrms ±10% PA Output: 235 mVrms Nominal Speaker Output: 0 dB Nominal (1 Vrms) Headphone Amplifier: 250 mW ±10% into 150 Ohms, 65 mW ±10% into 600 Ohms
Impedance	Dynamic Headset (Microphone): 50 to 200 Ohms Dynamic Headset (Headphones): 150 to 600 Ohms Program Input: 75 kOhms Intercom (Balanced): 300 Ohms Intercom (Unbalanced): 150 Ohms Intercom (Bridging): > 10 kOhms Speaker Output: 1 kOhm Nominal
Frequency Response	Headphone Amplifier: 200 Hz to 8 kHz (+1 dB / -3 dB) Speaker Output: 200 Hz to 8 kHz (+1 dB / -3 dB)
THD + N	Headphone Amplifier: < 0.2% at 200 mW
Common Mode Rejection	> 50 dB
Voltage Gain	Program Input: 25 dB (±3 dB) Headphone Amplifier: 30 dB (±3 dB)
Voltage Output	12 to 30 VDC (24 VDC Nominal), 65 to 150 mA (1 A per Channel Maximum)
Call Signaling	Send (Balanced): 20 kHz (±100 Hz), 0.5 Vrms (±10%) Receive (Balanced): 20 kHz (±800 Hz), 100 mVrms Send (Unbalanced): 11 VDC (±3 VDC) Receive (Unbalanced): 4 VDC Minimum
Control Frequency	Mic Kill (Send): 24 kHz ( Rating 80% users recommend this product to others. And what about you? This product has already been rated by 25 owners. Add your rating and experience with the product. Discussion Ask our technicians if you have a problem with your settings, or if anything is unclear in the user manual you have downloaded. You can make use of our moderated discussion. The discussion is public and helps other users of our website who may be encountering similar problems. The discussion is empty - enter the first post Post a new topic / query / comment: Items marked with * are required. Your name *: E-mail : Subject *: Message *: Your email address will not be displayed. Do not forget to fill it in if you want to receive a reply to your enquiry/contribution. Processing of personal data in accordance with GDPR