®
Telex
User Instructions
GRN 1
RED 2
WM2000
Volume
TM
Ch Select
WM2000 Shown
Listen
Call
Talk
Headset
Model WM1000 / WM2000
Wall Mount Intercom Stations
®
Audiocom
Intercom Systems
®
FCC Statement
This equipment uses and can radiate radio frequency energy that may cause interference to radio communications if not installed in accordance with this manual. 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 operated 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.
Introduction.
Thank you for purchasing the Audiocom WM1000 / WM2000 Wall Mount Intercom Station. 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 your new intercom station, please take a few moments to look through
this booklet before using the Intercom Station for the first time.
2
Table of Contents
Description .............4
Features ..............5
Installation .............6
Unpacking ............6
Configuration Switch Pre-check ........6
Intercom Channel Connections ........7
Dynamic-Mic Headset Connection .......9
Power-Up ............10
Sidetone Adjustment ..........10
Operation .............17
Channel Select (WM2000 Only) ........17
Receiving Calls ...........17
Calling an Intercom Channel ........17
Specifications ............18
Factory Service and Parts Information .......20
3
Audiocom®
Description
The WM1000 and WM2000 Intercom Stations are designed for stationary, wall-
mounted installation in standard two-gang electrical boxes. The WM1000 is a
single-channel station; the WM2000 provides switch-selectable access to either of
two intercom channels. The WM1000 and WM2000 are ideal when users need to ac-
cess the intercom system from strategic locations where a desktop station would be
unsuitable, but they do not wish to carry around a belt-pack station. Since all of the
intercom electronics are in the intercom station, the user need only connect a headset
or telephone style handset to begin communicating. Alternatively, a headset or tele-
phone handset can be left at the station.
9
TOP
FRONT
1
BACK
9
10
7
GRN 1
RED 2
WM2000
Ch Select
Volume
Ch 1
SW1
DIP SWITCH
POSITIONS
TM
Call
Talk
Headset
Ch 2
Listen
8
CLOSED (ON)
OPEN (OFF)
11 (4 Places)
2
3
4
56
Figure 1. Reference view, WM2000 shown (See numbered features list)
4
Features
1. ChannelSelectSwitch(WM2000Only):Usedtoswitchbetweenintercomchan-
nelsoneandtwo.Theswitchlightsgreenforchanneloneandredforchanneltwo.
2. Intercom Listen Key: Both momentary (push-to-listen) and latching (hands-free
listen) are possible.
3. Call Key: Used to send call signals on the intercom channel and to indicate in-
coming calls.
4. Intercom Talk Key: Both momentary (push-to-talk) and latching (hands-free
talk) are possible. Additionally, the WM1000 / WM2000 has a feature called
"mic kill receive" which lets an operator at a remote master station (such as the
US2000A) turn off the talk key.
5. Dynamic-Mic Headset Connector: 4-pin male XLR connector accepts headsets
with monaural headphones and either a balanced or unbalanced dynamic micro-
phone.
6. Volume Control: Adjusts intercom volume to headphones.
7. Audiocom / Clear-Com* Selector Switch: The selector switch sets the intercom
station for compatibility with either Audiocom or Clear-Com channel connector
pin-outs, channel power requirements, and call signaling requirements.
8. Configuration DIP switches: DIP switches are provided to enable/disable the fol-
lowing features:
CallBeep:Anoptionalcallbeeptonecanbeusedforincomingcallnotification.
Headset Microphone Type Selection: Balanced or unbalanced microphone
may be selected.
DC call enable: This may be turned on to use the intercom station with inter-
com systems that use DC call signaling.
9. Connections Terminal Block: Used to connect intercom channel(s) and an op-
tional local power supply.
10.Sidetone Trimmers: These are used to adjust the level of the station operator’s
own voice in the headphones.
11.Mounting Holes: The mounting holes fit any standard, two-gang electrical box.
* Brand names mentioned are the property of their respective companies.
5
Audiocom®
Installation
Unpacking
Each WM1000 / WM2000 is supplied with the following items. Contact the shipper
or your Audiocom dealer immediately if anything is damaged or missing. Detach and
fill out the registration card and return it to Telex to properly register your intercom
station.
Quantity Description
1 WM1000 or WM2000 Intercom Station
1 Warranty and registration card
1 User Instructions
4 Mounting Screws
Configuration Switch Pre-check
Before making connections, read the configuration switch notes that follow and
make sure that all switches are properly set for your intended usage. Table 1
lists the
switch descriptions and factory default settings. Figure 1 shows the locations of the
switches.
DC Call Enable (DIP Switch 2)
Leave this switch in the open position for Audiocom applications. Set it to the closed
position if the WM1000 / WM2000 will be used in a Clear-Com intercom system.
Incoming Call Beep (DIP Switch 3)
By default, incoming calls are indicated by a red-flashing Call key and a beep tone in
the headphones. If you do not want the beep tone, set DIP switch 3 to the closed position.
Headset Microphone Type Selection (DIP Switch 4)
If the headset specifications indicate the microphone type is balanced, or if you are
unsure, leave this switch in the open (default) position. If the specifications indicate
an unbalanced microphone set DIP switch 2 to closedn.
6
Table 1. Configuration Switch Settings
Switch
Number
1 Not used Don't care Open
2 Call signal method
3 Incoming call beep
4 Microphone type
5 Not used Don’t care Open
6 Not used Don’t care Open
7 Not used Don’t’ care Open
8 Not used Don’t care Open
Description Settings
Open=Off; Closed=On
Closed: DC
Open: Audiocom
Closed: Disabled
Open: Enabled
Closed: Unbalanced
Open: Balanced
Default
Setting
Open
Open
Open
Balanced/UnbalancedSwitch(SW-1)
This switch is set at the factory to the balanced (BAL) position for use with Audiocom intercom channels. Set the switch to the unbalanced (UNBAL) position for use
with a Clear-Com intercom system. Be sure and use the appropriate connection information based on how you have this switch set.
IntercomChannelConnections
Important!
The following paragraphs and illustrations describe installation of the WM1000 /
WM2000 in an Audiocom Intercom System. To use the WM1000 / WM2000 in a
Clear-Com Intercom System, set SW1 to the UNBAL position, set DIP switch 2 to
the Closed position, and connect the Clear-Com channel wires using the Unbalanced
Mode Intercom Channel pin-out information listed in the specifications (page19).
7
Audiocom®
General Information
After connecting intercom stations as described below, and before installing the
☞
mounting screws, connect a headset and perform the sidetone adjustment as described on page 10.
The WM1000 and WM2000 mount in a standard two-gang electrical box. Some example intercom system configurations are shown in Figures 2 through 5, pages 12
through 14. Detailed connections for the WM1000 and WM2000 are shown in Figures 6 and 7, pages 15 and 16. There are two basic methods for connecting the
WM1000 and WM2000: 1) using a phantom powered connection, and 2) using local
power. The two methods are discussed below:
Method 1: Phantom Powered Connection
In this method, operating power and intercom audio are delivered to the WM1000 /
WM2000 over the same wires. The advantage of this setup is simplicity of connection. Also, the Audiocom power supply automatically provides what is known as a
terminating impedance for the intercom system. Without this terminating impedance,
the sound quality on the channel will be very distorted, and the levels will shift every
time additional stations are connected to the channel. The disadvantage of the phantom power method is that some operating power is lost over very long intercom cables, and performance will then be reduced at remotely located stations. Generally, if
the intercom stations are located within a few hundred feet of the power supply,
phantom power will be sufficient. The actual distance over which power can be delivered can vary, however, depending on the number of stations connected. Increasing
the number of stations will reduce the distance. Note that the range over which power
can be delivered is independent from the range over which audio can be sent. Audio
can be transmitted for several miles, providing that intercom stations are locally powered as described below.
8
Method 2: Locally Powered Connection
Using this method, the intercom station is connected to the intercom line just like any
phantom-powered intercom station, except that a local power supply is also connected. This local power supply is located right with the intercom station and provides power for that station only. Since power loss on the intercom lines is no longer
an issue, the operating range is now limited only by the audio transmission range,
which is several miles. Another advantage to this method is that more stations can be
connected to the intercom channels. When local power is supplied to an intercom station, the station detects this and automatically disconnects from the phantom power
supply. As long as an Audiocom power supply is located somewhere in the intercom
system, the proper terminating impedance will still be supplied for all stations.
All Locally Powered Intercom Stations (Dry Lines)
If all intercom stations are widely distributed, you can dispense with a main power
supply and use local power for each station. When no power is delivered on the intercom channels, this is known as dry-line operation. However, since an Audiocom
power supply is not used, a line termination must be inserted in each intercom channel for proper operation. Figure 5
The required termination components are shown in Figure 8, page 16.
Dynamic-Mic Headset Connection
For headset specifications, see page 18. For best results in noisy environments, a
☞
noise canceling (directional or cardioid) microphone is highly recommended.
1. Make sure that DIP switch 4 is properly set for balanced or unbalanced microphone. See Table 1, page 7.
2. Plug the headset into the headset connector. Power up the intercom system and
check the sidetone adjustment before placing the station in operation.
, page 14 shows an example of dry line operation.
9
Audiocom®
Power-Up
Make sure any local power supplies are plugged in, and turn on the power switches
of any phantom power supplies.
If you are using a large number of locally powered intercom stations, you should
☞
activate their local power supplies before activating any phantom power supply.
Otherwise, you may get an overload indication on the phantom supply. In this
case, either reset the phantom supply, or momentarily turn it off, then on.
Sidetone Adjustment
The WM1000 and WM2000 use full-duplex audio (the same as conventional telephone lines) in which the talk and listen audio are sent and received on the same
wires. Thus, when you talk on a channel, you will also here your own voice back in
the headphones. If you are using open-ear style headphones, this could cause unwanted feedback, since the microphone may pick up your returned voice audio and
re-amplify it. On the other hand, if you are using headphones that completely enclose
the ears, a certain amount of your own voice level is desirable to overcome the muffled sensation when talking. The sidetone adjustment is different for these two situations.
If you are using open-ear style headphones, adjust sidetone as follows:
1. Activate channel 1 as described in the operating instructions. (Required only for
the WM2000, the WM1000 is active on whichever channel it is connected to.)
2. Activate talk and listen as described in the operating instructions.
3. Slowly increase the volume to maximum while talking into the microphone.
4. Using a small flat-bladed screwdriver, adjust the channel 1 sidetone trimmer (Fig-
) to minimize your voice level in the headphones.
ure 1
5. For the WM2000 only, activate channel 2 and repeat the above steps to adjust
the channel 2 sidetone.
10
6. Install the intercom station mounting screws after completing the adjustments.
The station is now ready for use.
If you are using headphones that completely enclose the ears, adjust sidetone as
follows:
1. Activate channel 1 as described in the operating instructions. (Required only for
the WM2000, the WM1000 is active on whichever channel it is connected to.)
2. Activate talk and listen as described in the operating instructions.
3. Set the volume control to the normal listening level for intercom audio.
4. While talking into the microphone, use a small flat-bladed screwdriver to adjust
the channel 1 sidetone trimmer (Figure 1
the headphones at an acceptable level.
5. For the WM2000 only, activate channel 2 and repeat the above steps to adjust
the channel 2 sidetone.
6. Install the intercom station mounting screws after completing the adjustments.
The station is now ready for use.
) so that you can hear your own voice in
11
Audiocom®
500 METERS
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
WM2000
Listen
Call
Talk
Headset
WM2000
Listen
Call
Talk
Headset
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
WM2000
Audiocom
WM1000
Volume
WM1000
Listen
Call
Talk
Headset
Listen
Call
Talk
Headset
Audiocom
Listen
WM1000
Call
Talk
Volume
Headset
WM1000
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
Audiocom
Listen
WM2000
Call
GRN 1
Ch Select
Talk
RED 2
Volume
Headset
WM2000
PS2000L
1
2
R
Figure 2. A two-channel intercom system using one PS2000L Pow er Supply set to
isolate mode. In isolate mode, each intercom channel is a separ ate party line, and
total current for each channel is limited to 1 amp. Note that both WM1000 and
WM2000 stations may be connected, depending on each locations’ need to
communicate with one or two channels. WM1000 stations may be connected to either
channel one or two. Also note that locally powered stations may be connected. This
is recommended when stations are installed at remote locations. Since the PS2000L
provides termination for the intercom channels, no user-installed termination is
required. For WM1000 connection details refer to Figure 6
; for the WM2000, refer to
Figure 7
PS2000L
RESET
Audiocom
WM1000
Volume
Headset
WM1000
WM1000
Audiocom
WM1000
Volume
Headset
Audiocom
Listen
Call
Talk
Listen
WM1000
Call
Talk
Volume
Headset
WM1000
WM1000
Audiocom
Listen
Call
Talk
Listen
WM1000
Call
Talk
Volume
Headset
Audiocom
WM1000
Volume
Headset
WM1000
WM1000
Audiocom
WM1000
Volume
Headset
Listen
Call
Talk
Listen
Call
Talk
2
R
Figure 3. A single-channel intercom system using one PS2000L with WM1000
Intercom Stations. The PS2000L may be set to either combine or isolated mode. In
combine mode, all intercom stations talk on a single party line, and total current for
the channel is 2 amps. In isolate mode, one string of intercom stations is operated
as channel one, and the other string is operated as channel two. There is no
communication between the separate channels, and the total current per channel is
1 amp. For WM1000 connection details, refer to Figure 6
.
12
PS2000L
1
RESET
GRN 1
RED 2
GRN 1
RED 2
Audiocom
WM2000
Ch Select
Volume
Audiocom
WM2000
Ch Select
Volume
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
WM2000
WM1000
Audiocom
WM1000
Volume
Listen
Talk
Headset
Listen
Talk
Headset
Headset
Headset
Listen
Talk
Listen
Talk
WM2000
WM2000
CHANNEL 1 CHANNEL 2
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
WM2000
WM2000
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
Listen
Talk
Headset
Listen
Talk
Headset
GRN 1
RED 2
GRN 1
RED 2
100-240VAC 60/50 HZ
Audiocom
WM2000
Ch Select
Volume
Audiocom
WM2000
Ch Select
Volume
CHN 1
CHN 2
PS2000L PS2000L
Listen
Talk
Headset
CLASS 2WIRING 1.5A 24VDC
WM2000
WM2000
Listen
Talk
Headset
MADE IN USA
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
WM2000
WM2000
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
Listen
Talk
Headset
Listen
Talk
Headset
100-240VAC 60/50 HZ
Audiocom
WM1000
Volume
WM1000
WM2000
Audiocom
WM2000
GRN 1
Ch Select
RED 2
Volume
CHN 1
CHN 2
CLASS 2WIRING 1.5A 24VDC
Listen
Talk
Headset
Listen
Talk
Headset
MADE IN USA
Figure 4. A two-channel intercom system using two PS2000L power supplies. Each
PS2000L is set to combine mode and it supplies power to one intercom channel
only. Each intercom channel is a separate party line, and total current for each
channel is limited to 2 amps. Note that both WM1000 and WM2000 Intercom
Stations may be connected, depending on each locations’ need to communicate
with one or two intercom channels. For WM1000 connection details refer to Figure
6
; for the WM2000 refer to Figure 7.
13
Audiocom®
Audiocom
Listen
WM1000
Call
Talk
Volume
Headset
WM1000 WM2000 WM2000
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
Audiocom
Listen
WM2000
Call
GRN 1
Ch Select
Talk
RED 2
Volume
Headset
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
Audiocom
Listen
WM2000
Call
GRN 1
Ch Select
Talk
RED 2
Volume
Headset
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
LINE
TERMINATION
Audiocom
GRN 1
RED 2
Audiocom
Listen
WM2000
Call
Ch Select
Talk
Volume
Headset
Listen
WM1000
Call
Talk
Volume
Headset
GRN 1
RED 2
Audiocom
WM2000
Ch Select
Volume
Listen
Call
Talk
Headset
WM1000 WM2000WM2000
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
Figure 5. An example of an intercom system using all local powered stations, with
no power being distributed on the intercom channels (dry lines). WM2000 stations
are shown, but WM1000 stations may also be used. Since an Audiocom power
supply is not used, the installer must connect a line termination somewhere in each
channel for proper operation. The required line termination is shown in Figure 8
.
14
TO ADDITIONAL
SINGLE-CHANNEL STATIONS
TO POWER
SUPPLY CONNECTOR
Pair 1
Pair 2
Channel Audio high / Power
Channel Audio low / Power
DC Common
Shield*
PIN 1
CableType:22AWG Stranded, 2-PairTwisted-wire, with Shield
Denotes twisted pair.
Denotes shield.
*Shield: Earth ground (Connect at power supply only.
Do not short to DC common)
Shield*
OPTIONAL LOCAL
POWER SOURCE
12 to 15 VDC, 65 to 150 mA
+ DC
COMMON
Figure 6. Audiocom mode connections for a WM1000 Intercom Station
15
Audiocom®
SINGLE- OR TWO-CHANNEL STATIONS
TO ADDITIONAL
Shield*
PIN 1
CableType:22AWG Stranded, 3-Pair Twisted-wire, with Shield
*Shield: Earth ground (Connect at power supply only.
Do not short to DC common)
TO POWER
SUPPLY CONNECTOR
Pair
Pair
Pair
Denotes twisted pair.
Denotes shield.
Channel 2 Audio low / Power
Channel 2 Audio high / Power
Channel 1 Audio low / Power
Channel 1 Audio high / Power
DC Common
Shield*
OPTIONAL LOCAL
POWER SOURCE
12 to 15 VDC, 65 to 150 mA
+ DC
COMMON
Figure 7. Audiocom mode connections for a WM2000 Intercom Station
Channel audio low
Channel audio high
Resistors 300 Ohm, 1/4W
Capacitors 22 f, 35V
µ
Non-polarized Electrolytic
Common
Figure 8. Audiocom mode line termination for dry-line operation. (One required for
each channel.)
16
Operation
Channel Select (WM2000 Only)
Tap the Ch Select key to select channel 1 or 2. The key is green when channel 1 is selected and red when channel two is selected.
Receiving Calls
1. When there is an incoming call signal the Call key will flash red. There will also
be a beep tone in the headphones if the beep feature is activated (page 6).
WM2000 only: incoming call indication is provided only for the currently se-
☞
lected channel.
2. Turn on the Talk and Listen keys and begin your conversation. Turn the keys off
when finished.
You can turn the talk and listen keys on in either momentary or latched mode.
☞
For momentary operation, press and hold the key. For latched operation, tap the
key to turn it on. Then tap it again to turn it off when finished.
Calling an Intercom Channel
1. WM2000 only: select the desired intercom channel.
2. Press and hold the Call key. An inaudible call signal will be sent, and the Listen
key will automatically turn on.
3. When you hear a response, release the Call key and activate the talk key.
4. Turn off your Talk and Listen keys to end the conversation.
17
Audiocom®
Specifications
General
Power Requirements:
Phantom Power:24 VDC nominal (12 to 30 VDC), 65 to 150 mA
Local Power:12 to 15 VDC, 65 to 150 mA
Dimensions: Mounts in standard two-gang electrical box
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 ohm, dynamic (balanced or unbalanced)
Headphones: 150 to 600 ohm, monaural
Connector Type:XLR-4M
Pin 1 Microphone low
Pin 2 Microphone high
Pin 3 Headphone high
Pin 4 Headphone low
Intercom Channels, Balanced Mode (SW1 set to BAL position)
Output Level:1 Vrms nominal
Input Impedance: 300 ohms
Bridging Impedance: greater than 10,000 ohms
Sidetone: -40 dB, 35 dB adjustable range
Call Signaling:
Send: 20 kHz ±100 Hz, 0.5 Vrms ±10%
Receive:20 kHz ±800 Hz, 100 mVrms
Mic-Kill Detect Frequency:24 kHz ±800 Hz, 100 mVrms
Noise Contribution: less than -70 dB
Common Mode Rejection Ratio: greater than 50 dB
Connector Type:Six-position terminal block with screw-in wire clamps
Pin 1 Audio and DC Common
Pin 2 Local power (12 to 15 VDC, 65 to 150 mA)
Pin 3 Intercom channel 1 audio low and +24 VDC phantom power
Pin 4 Intercom channel 1 audio high and +24 VDC phantom power
Pin 5 Intercom channel 2 audio low and +24 VDC phantom power
Pin 6 Intercom channel 2 audio high and +24 VDC phantom power
18
Intercom Channel, Unbalanced Mode (SW1 set to UNBAL position)
Output Level:1 Vrms ±10%
Input Impedance: 150 ohms
Bridging Impedance: greater than 10,000 ohms
Call Signaling:
Send: 11 ±3 VDC
Receive:4 VDC minimum
Connector Type: Six-position terminal block with screw-in wire clamps
Pin 1 Common
Pin 2 Local power (12 to 15 VDC, 65 to 150 mA)
Pin 3 Channel 1 +24 VDC input
Pin 4 Channel 1 Intercom audio high and DC call
Pin 5 Channel 2 +24 VDC input
Pin 6 Channel 2 Intercom audio high and DC call
19
Audiocom®
Factory Service and Parts Information
When returning equipment for repair include your return address, telephone number
and proof of date of purchase, along with a description of the problem.*
The address for Audiocom equipment returns and parts information is:
Service Department
Telex Communications, Inc.
West 1st Street
Blue Earth, Minnesota 56013 U.S.A.
Telephone: (507) 526-3205
(Collect calls not accepted)
Warranty Repairs - If in warranty, no charge will be made for the repairs. Equipment
returned for warranty repair must be sent prepaid and will be returned prepaid.
Non-Warranty Repairs - Equipment that is not under warranty must be sent prepaid
to Telex. If requested, an estimate of repair costs will be issued prior to service. After
your approval and completion of the repairs, the equipment will be returned on a collect basis. Collect charges may be avoided by sending a signed check for payment in
full along with your signed estimate approval form (shipping charges are included in
the estimate).
* For sales / technical support and system design contact:
Pro Audio Sales Department
Telex Communications, Inc.
9600 Aldrich Avenue South
Minneapolis, Minnesota 55420 U.S.A.
Telephone: (612) 884-4051
(Collect calls not accepted)
20
Notes21Notes
Audiocom®
22
Notes
23
®
TELEX COMMUNICATIONS, INC. 9600 Aldrich Ave. So., Minneapolis, MN 55420 U.S.A.
9350-7621-000 Rev. C, 10/98
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