Telex audiocom ems-4001 用户手册

The EMS-4001 adds four powered intercom channels to an MS-2002 or MS-4002 Master Station, and it provides talk, listen 

and call buttons for the added channels. Up to four EMS-4001 Expansion Master Stations may be connected to the MS-2002 

or MS-4002 to can add up to 16 channels (20 channels total). The MS-2002 or MS-4002 microphone is used to talk back to the 

EMS-4001 channels, and the MS-4002 speaker is typically used for listening. However, there are also separate speaker jacks 

on the back panel of the EMS-4001 for independent monitor speakers, if desired. There are also 4 additional program inputs on 

the back of the EMS-4001, one for each added channel.

The EMS-4001 integrates four powered channels with talk, 

listen, and call controls in a single rack mount unit. Saves on 

rack mount hardware and eliminates power supply to expan-

sion station interconnect cables.

Connects directly to an MS-2002, MS-4002 or US-2002 

Master Station to add 4 complete powered channels. Or 

connects to a previous EMS-4001 or ES-4000A Expansion 

Station to add another 4 powered channels (up to 18-20 

channels total).

Provides automatic current limiting during short circuits or 

overloads. Front panel fault indicator provided for each chan-

nel. The SPS-2001 has Instantaneous Auto Reset (IAR), the 

newest technology in performance and safety, which uses 

a revolutionary new circuitry that dynamically monitors line 

fault conditions.

Turn off all microphones on a selected expansion channel, or 

all channels, using the master station’s Mic Kill key.

Each expansion channel has its own program input. Con-

nect any line-level audio source for monitoring in the master 

station’s speaker or headset and for routing to the expan-

sion channel if desired. When program audio is routed to 

the channel it can be set to interrupt while the master station 

operator is talking on the channel.

If the master station is equipped with external powered 

speakers you can assign the EMS-4001 channels to either 

right or left speaker.

Instantaneous Auto Reset (IAR), the newest technology in 

performance and safety, which uses a revolutionary new 

circuitry that dynamically monitors line fault conditions. Then, 

when the fault is removed, automatically brings individual 

power supply channels up.