Telex EMS4000 User Instructions
®
Telex
User Instructions
Listen
Call
Listen
Talk
Call
Listen
™
Talk
Call
Listen
Talk
Call
Talk
EMS4000
RESET
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Model EMS4000
Four-channel Expansion Master
Station and Power Supply
Audiocom
®
Intercom Systems
®
FCC Statement
This equipment uses and can radiate radio frequency energy that may cause in
terference to radio communications if not installed in accordance with this man
ual. The equipment has been tested and found to comply with the limits of a
Class A computing device pursuant to Subpart J, Part 15 of FCC Rules which
are designed to provide reasonable protection against such interference when op
erated in a commercial environment. Operation of this equipment in a residential
area may cause interference which the user (at his own expense) will be required
to correct.
This product meets Electromagnetic Compatibility Directive 89/336/EEC.
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Introduction.
Thank you for purchasing the Audiocom EMS4000 Four-channel Expansion
Master Station and Power Supply. We hope the many design features of this
product will satisfy your intercommunication requirements for many years to
come. To get the most out of the EMS4000, please take a few moments to look
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through this booklet before using the Intercom Expansion Station for the first
time.
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Table of Contents
Description .............4
Features ..............5
Installation .............7
Unpacking ............7
Configuration Pre-check ..........7
Mounting Configurations .........10
Connection Notes ...........14
Cables .............14
Power-Up ............15
Sidetone Adjustments ..........15
Operation .............15
Specifications ............16
Factory Service and Parts Information .......18
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Audiocom®
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
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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
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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.
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®
Listen
Call
3456
Talk
123
100-240VAC 60/50 HZ
6 7 8 9 10 11
Figure 1. ES4000A Reference View (See numbered features on next page)
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Listen
Listen
Call
Call
Talk
Talk
CHN3 CHN4 CHN5 CHN6
Listen
Call
Talk
CLASS2 WIRING 1.5 A 24 VDC
EXPINEXP
EMS4000
345
6
Reset
45
SPEAKER
5
3
OUT
4
LINE LEVEL
1VRMS
PROGRAM
INPUTS
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BAL-OUT
UNBAL-IN
PGMVOL
3456
TELEX COMMUNICATIONS,INC.
MADE IN USA
Features
1. Intercom Talk Keys: Momentary or latching (hands-free) operation possible.
2. Call Keys: Used to call intercom channels and to indicate incoming calls.
3. Intercom Listen Keys: Momentary or latching operation possible.
4. Channel Power Status Indicators: The indicators are green for normal operation
and change to red if there is a short circuit or overload condition on a power out
put line. If an indicator turns red, either disconnect the corresponding channel
connector or turn off the intercom system and locate the problem before resum
ing operation
5. Reset Button: Used to resume normal operation after an overload condition has
been corrected.
6. Universal AC Power Connector: Accepts a variety of international power cord
types.
7. Intercom Channel Connectors: These connectors provide the power and audio
connections for each of the 4 intercom channels.
8. EXP IN and EXP OUT Connectors: The EXP IN connector receives the micro-
phone audio signal from the MS2000, and it sends the monaural mix of the four
EMS4000 channels to the MS2000 speaker or headset. The EXP OUT connector
connects to the EXP IN connector of an additional EMS4000. Up to 4 EMS4000
Expansion Master Stations may be daisy chained with the EXP IN and EXP
OUT connectors. An EXP IN/OUT cable is supplied with each EMS4000.
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9. SPEAKERS: Usually, the listen mix of all 4 EMS4000 channels is sent to the
MS2000 speaker or headset via the EXP IN connector. Alternatively, speakers
may be connected to one or more of the speaker outputs of the EMS4000.
10. BAL / UNBAL Switch: This selector switch sets the EMS4000 for compatibility
with either Audiocom or Clear-Com* channel connector pin-outs, channel
power requirements, and call signaling requirements. Important! The internal
switches S200 and S600 must be set the same as the back panel BAL/UNBAL
switch.
* Brand names mentioned are the property of their respective companies.
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Audiocom®
11. Program Inputs Connector and Trimmers: Each intercom channel has its own
program input and level adjust trimmer. For each program input, there is an inter
nal jumper which routes the program either to the intercom channel only, or to
both the intercom channel and the MS2000 headset or speaker (default setting).
Additionally, the program signal to the intercom channel may be turned on or
off via the MS2000 front panel programming. There is also an internal program
interrupt DIP switch which selects either automatic program interrupt when the
station operator activates a channel's talk key, or no program interrupt during
talk. The EMS4000 program inputs connector may be broken out to common
3-pin XLR audio cables using an optional XP-4PGM Breakout Panel.
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12. Configuration Switches, Jumpers and Sidetone Controls (Figure 2
). These let
you customize the operation of the EMS4000 to match your intercom system re
quirements. See “Configuration Pre-check”, page 7
BAL / UNBAL
SW2
321
J18
Ch 5
321
J21
Ch 6
Sidetone
Trimmers
Program
Listen
Jumpers
321
J15
Ch 3
SW1
DIP Switches
321
J16
Ch 4
SW3
, for details.
S600
S200 & S600
MUST BE SET THE SAME
AS SW2 ON THE BACK PANEL.
FACTORY SETTING BAL
(AUDIOCOM)
S200
UNBAL
(CLEAR-COM)
BAL
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Figure 2. Locations of configuration switches, jumpers, and sidetone controls.
(Top cover removed.)
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