Description
The EMS4000 adds four powered intercom channels to an MS2000 Master Station,
and it provides talk, listen and call buttons for the added channels. Up to 4 EMS4000
Expansion Master Stations may be connected to the MS2000 to add up to 16 chan-
nels (18 channels total). The MS2000 microphone is used to talkback to the
EMS4000 channels, and the MS2000 speaker is typically used for listening. How-
ever, there are also separate speaker jacks on the back panel of the EMS4000 for in-
dependent monitor speakers, if desired. There are also 4 additional program inputs
on the back of the EMS4000, 1 for each added channel.
The MS2000 / EMS4000 combination can be used as a simple, multi-channel intercom
user station. In this configuration, the program inputs (and possibly the PA output of
the MS2000) are most likely not used, and the station operator has only talk, listen and
call capability. It is also possible that advanced features of the MS2000, such as Mic
Kill Send, might be turned off. Alternatively, the MS2000 / EMS4000 can be used as a
master station. In this application, one or more program inputs and the PA output may
be connected, and the program signals to the intercom channels can be turned on or off
from the MS2000. Additionally, the Mic Kill Send feature can be enabled, and micro-
phones on any channels may then be turned off from the MS2000.
4
A u d i o c o m ®
3
4
5
6
3
4
5
6
EMS4000
CHN3
CHN4
CHN5
CHN6
CLASS 2 WIRING 1.5 A 24 VDC
EXP
IN
EXP
OUT
3
5
4
6
LINE LEVEL
1 VRMS
BAL-OUT
UNBAL-IN
SPEAKER
PGM VOL
3
4
5
6
TELEX COMMUNICATIONS, INC.
MADE IN USA
100-240 VAC 60/50 HZ
Reset
1 2 3
4
5
6
7
8
9
10
11
PROGRAM
INPUTS
®
Listen
Call
Talk
Listen
Call
Talk
Listen
Call
Talk
Listen
Call
Talk
Figure 1. ES4000A Reference View (See numbered features on next page)
