BHI NEIS-RM User manual

NEIS-RMIntercom OperatingManual
NEIS-RMIntercom OperatingManual Page1
1080-100D
IssueC
bhibhi
bhibhi
bhi
NEIS-RM
Noise Eliminating Intercom System
Installation
and
Operating Manual
Remote Microphone Version
Page20
bhibhi
bhibhi
bhi
DSPnoise cancellation products
DSP Noise Cancellation
bhiLtd
POBox318
BurgessHill
WestSussex
RH159NR
England
tel:[phone]
fax:[phone]
[email protected]
www.bhi-ltd.com

NEIS-RMIntercom OperatingManual
NEIS-RMIntercom OperatingManual
Page2
Important Information
Copyright
This publication, including all photographs and
illustrations is protected under international copyright
laws, with all rights reserved. Neither this manual, nor
any of the material within, may be copied or reproduced
without the written consent of bhi Ltd.
Disclaimer
The information in this document is subject to change
without notice. bhi Ltd. makes no representations or
warranties with respect to the contents hereof and
specifically disclaims any implied warranties of
merchantability or fitness for any particular purpose.
Furthermore, bhi Ltd. reserves the right to revise this
publication and to make changes from time to time in
the content hereof without obligation of bhi Ltd. to notify
any person of such revision or changes.
Page19
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PackingList:
Please check the contents of the box.
•Operatingmanual
•NEIS-PSU - Medical power supply with worldwide adapters
•NEIS-MIC-Remotemicrophone
•NEIS-DU-Deskconsole
•NEIS-SPKR-Loudspeakerunit
Note: We recommend that installation be carried out by qualified
personnel.
Please study this manual before attempting to install the intercom.
To install this intercom you will need the following additional items:
•CAT5networkcable/connections(straight-through).
• Suitable fixingsformountingthe loudspeaker
• Suitable tools for installation of the above
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NEIS-RMIntercom OperatingManual
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1. Introduction 6
1.1 Systemoverview 6
1.2 Features 7
2. Intercom description 8
2.1 Intercomcomponents 8
2.2 Intercom componentdescription 9
2.2.1 Loudspeakerunit 9
2.2.2 Remotemicrophone 9
2.2.3 Deskconsole 9
3. Installation 11
3.1 Basicinstallation 11
3.2 Powersupply 11
3.3 Loudspeakermounting 11
3.4 Cable connections 12
3.5 Deskconsole 13
4. Operation 14
4.1 Deskconsole controls 14
4.2 Loudspeakercontrols 15
4.3 Noise cancellation level setting 16
Contents
Page17
leveL noitcudeRenoT esioNetihW noitcudeR
1Bd4Bd9
2Bd5Bd11
3Bd6Bd31
4Bd8Bd51
5Bd61Bd71
6Bd12Bd02
7Bd52Bd42
8Bd56Bd53
Table 1. Tone and noise reduction levels.
leveL )6-5(5J )4-3(5J )2-1(5J
1nOnOnO
2nOnOffO
3nOffOnO
4nOffOffO
5ffOnOnO
6ffOnOffO
7ffOffOnO
8ffOffOffO
Table 2. Preset DSPlevels using on board jumpers.
The DSP levels are set by the following combination of jumpers.
4. Operation.

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Weee Statement for correct disposal of this product
(ApplicableintheEuropeanUnionandotherEuropeancountrieswith
separate collection systems). This marking shown on the product or
its literature, indicates that it should not be disposed of with other
householdwastes at the end of its working life.Topreventpossible
harmtotheenvironmentorhumanhealthfromuncontrolledwaste
disposal, please separate this from other types of wastes and recycle
it responsibly to promote the sustainable reuse of material resources.
Householdusersshould contact either the retailer where they
purchasedthisproduct, or their local government office, for details of
whereand how they can take this item for environmentally safe
recycling. Business users should contact their supplier and check the
termsand conditions of the purchase contract. This product should
not be mixed with other commercial wastes for disposal.
Page16
4. Operation.
4.3 Noise cancellation level.
Figure 9. Bottom view of desk console.
Noisecancellation
jumperplugs
Deskconsole
When the jumper is placed over
the two pins the jumper is ON.
Whenthejumperis connected to
onepinonly,or removedfromthe
boardit is OFF. To reduce the risk
of losing the jumper it is advised
to place it on one pin when using
theOFF position.
J5pins ON
OFF
2 3
56
1
Figure10. Jumperdetails.
Thenoise cancellation filter level issetto the optimum position (level
7). Howeverthe noise reduction may be changedtosuitthe specific
requirementsof the installation. The unit has a choiceof 8 levels of
noisereduction, these are set by 3 jumperplugsaccessiblefrom the
bottom of the desk unit, underneath the serial number label. The
jumpers can be changedusing a small pair of snipenosed pliers or
similartool

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1. Introduction.
1. Introduction.
1.1 Systemoverview:
Thebhi NEIS NoiseEliminatingIntercom Systemenables clearvoice
communicationsfromwithinnoisy environments.Using uniqueDigital
Signal Processing (DSP) technology, unwanted noise and
interferencepicked up by the microphone in the communication can
beremovedfromthesignaltoleaveclearintelligible speech.
The NEIS is suitable in a wide range of noisy applications, where
the sounds of fans, motors, engines, air-conditioning, traffic etc.,
give rise to poor voice communications. The system is particularly
useful for improving the voice quality in medical and industrial
environments, where noisy machines can make voice
communicationdifficult.
Usingminimal hardware components, the installationand operation
of the bhi intercom system is very easy, connections being made
viaa single cat 5datacable.The NEIS ispre-configuredfor optimum
noise cancelling, and is fully adaptive to changing environmental
conditions. Itis suited to a varietyofapplications,where clear “noise
free” two-way voice communications are important, including:
Hospitalradiotherapy/radiologytreatmentrooms, mines, railwayand
transport depots, customer help points, factories & office
communications.In facttheNEIS provides asimple effectivesolution
for anyone trying tocommunicate from within a noisy environment.
Simply plug in the power and the system is ready to go.
TheNEIS consistsof a stylish, robust, desktop speaker control unit,
with a “push-to-talk” button, connected to a remote “hands free”
speaker unit, with a remote microphone attached. This allows the
noisy location to be constantly monitored, an important feature for
safetycriticalenvironments.
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4. Operation.
4.2 Loudspeaker control.
Figure 8. Rear view of loudspeaker unit
Thevolume of theloudspeakercan be adjusted bytherear mounted
control.
Push To Talk
Thedesk consoleunitdefault mode isto listen totheremote speaker,
all speech at the remote speaker will be heard when the unit is
switch on. Press and hold the Push-to-talk (ptt) switch to enable
communicationto the remote speaker,release the button to hear a
response back from the user.
Remote Privacy
For privacy at the remote speaker end, turn the system off using
the Volume ON / OFF control on the desk console unit.
Note: Using this function will mean that the user will no longer be
monitored.

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1. Introduction.
1.2Features:
 Upto 98% noise reduction
 Cleartwo-way voice communications
 Superb audio quality using bespoke audio circuits
 Easy to install modularsystem
 Simple connection via single cat 5 computer cable
 Stylish desktop speaker console with “push to talk” function
 Robust speaker unit with remote microphone & separate
volumecontrol
 Noise filter Monitorswitch
 On/off volume controlswitch
 Medicalpower supply 12 VDC (1.25A)
 Dims (WxDxH) Speaker unit 180 x 160 x 240mm
 Dims (WxDxH) Control unit 150 x 220 x 70mm
Page14
4. Operation
4. Operation.
4.1 Desk console controls.
Figure 7. Rear view of desk unit
Poweron/off
volumecontrol Noise cancellation
on/offswitch
CAT5Loudspeaker
connector Power
connector
Power On Off
Ensure the power supply is plugged in at the wall socket and the
wall socket is turned on. Using the on/off Volume control knob on
the rear of the desk unit, turn on the unit.
Noise Cancellation
Thedesk unit is pre-set for optimum noisereductionandadjustment
isnotnormallynecessary.Thenoisecancellationswitchontherear
ofthe unit can be used tomomentarilydisable the noisecancellation
system, hold the switch up in the off position and all noise will be
heard from the remote speaker. Release the switch and the noise
willbe removed. Adjustthevolume control foracomfortablelistening
level.

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2. Intercom description.
2. Intercom description.
2.1 Intercom components.
Figure1. Intercomcomponents.
Loudspeakerunit
Deskconsole
DCpower supply
The NEIS consists of the following components:
 Loudspeakerunit
Deskconsole
Powersupply
Remotemicrophone
Page13
3.5 Deskconsole.
Site the desk console unit in the quiet area. Connect the other end
of the CAT5 cable to the loudspeaker socket, and the power
supplyintothepowerconnector.
CAT5cablefrom
loudspeaker
DCpower supply
Deskconsole
Figure6.Deskconsole connections.
3. Installation.
Remote“plug-in” microphoneassembly

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2. Intercom description.
2.2 Intercom component description.
2.2.3Deskconsoleunit.
The desk console unit is best located in a quiet area (normaly the
equipment control room), and receives audio from the user in the
noisy area through its small loudspeaker. It has a push-to-talk (ptt)
buttonon the front to enable speech back to the user.The unit has a
poweron/offswitchwithvolumecontrol,aseparatenoisefiltermonitor
switch on rear of the unit, a noise filter level select switch on the
bottom of the unit. This unit contains the noise cancellation
electronics to enable the removal of any noise that is present with
thevoicesignal.The unitconnects tothecat 5cable viatheconnector
on the rearof the unit.
2.2.1Loudspeakerunit.
Theloudspeakerunitmountsin a suitablelocation in the noisy area
to give optimum voice quality to the user. The unit features a
separatevolume control, enabling the speaker output volume to be
set up to suitthe surrounding conditions and environment. The cat
5 cable connects at the rear of the unit.
2.2.2Remote microphone.
The remote microphone connects to the rear of the loudspeaker
unit, and is best placed as near to the user as possible to obtain
optimum audio performance. The most common routing of the
microphonecable is through the ceiling andsuspendeddownin-line
withthe patients face and as near to their mouth as possible. It can
alsobe clippedinside the gantryusing a standardplastic cable holder
orty-rap.
Page12
3.4 Cable connections.
Figure5.CAT5cable connections.
3. Installation.
Connections:
Connectionsare madeusing standardCAT5 straight-throughtwisted
pairRJ45 cables
NEIS-DU NEIS-SPKR
7 = White/Brown 7 = White/Brown
8 = Brown 8 = Brown
1=White/Orange
2= Orange
3= White/Green
4= Green
5= White/Blue
1=White/Orange
2= Orange
3= White/Green
4= Green
5= White/Blue
6= Blue
6= Blue

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3. Installation
3. Installation.
3.1 Basic installation diagram.
Deskconsole
Powersupply
Quietarea Noisy area
Remote
Microphone
Loudspeaker
CAT5cable
Figure2.Basicblock diagram.
Figure3. Power supply.
Pushpins onto
powersupply body
3.2 Power supply.
Themedical power supply used for theNEIS is a modular unit, and
consists of a modular pin unit and the power supply so as to
accommodatethe differenttypes of voltageand connections around
the world. Before the power supply can be used, plug the pin unit
supplied onto the power supply body until it clicks into place.
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3.3 Loudspeaker mounting.
Figure4. Loudspeaker connections.
Rearofspeakerunit
Closeup of
connectionsand
controls
Volume
control Microphone
connector
CAT5cable
connection
Microphone
3. Installation.
Mount the wall bracket supplied with the speaker unit in a suitable
locationin the noisy area, so that it optimizes the audiofor the user.
Themicrophone and cat 5 cable should be connected at the rear of
thespeaker before the speaker is secured into the bracket,and the
microphone should be mounted at least 1 metre away from the
speaker.