Black Box LWU200-E-US User manual

Black Box
LWU200-E-US
Users’ Manual 2.0

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Safety of the Black Box LWU product
The Black Box LWUis classified as Class 3B laser product.
The Black Box LWUSystem has been tested and found to comply with the
EN 60825-1:1994+A11:96+A2:2001 (laser safety),
EN 60950-1:2001 (electrical safety),
EN 55022:1998+A1:200+A2:2003 Class 3B (emission)
and EN 55024:1998+A1:2001+A2:2003 and EN 61000-6-2:2001 (immunity)
Europeanstandards.
Thelaserradiationisemittedfromthetransmitteropticsthroughtheglasswindow in
the front side of the laser head under less than 10 mrad divergences. No other
aperture through which laser radiation can occur present in the laser head.
Warning!
Invisible laser radiation! Looking directly into the laser beam can
cause permanent damage to the eye! Safe looking distance varies
withbeampoweranddivergence.Seeattached datasheetforexact
figures.
The Black Box LWU product should be installed in such a way that nobody can
accesstheopticalwindoworcangetinthewayofthelaserbeamaccidentally.For
detailed instructions please read chapter 5.3.5 Eye Safety on page 20.
TheBlackBoxLWU productprovidedwithallthenecessarylabelsspecifiedbythe
standards.Moreoverinformativelabelsshouldbeputonclearlyvisibleplaceswhere
thelaser beamcanbeaccessed. Thelocationsofthewarninglabelsare shownon
page 20 of the manual (Chapter 5.3.5/Eye Safety).
The Outdoor Interconnection Unit is assembled with a certified power cord, which
mustbeconnectedtothemainsthroughapoweroutletto make the disconnection
possible at any time. Any modification to the above installation is prohibited. If
modificationsare requiredbythelocal standard,pleasecontactthemanufacturer.
ToensurethecompliancewiththeEN60950safetyrequirements,thesystemshould
be installed only by the manufacturer or its certified partners.
Warning!
Operating theBlack Box LWUproduct other than described in this
manual can cause undesired laser radiation and can be dangerous
to he eye or electrical shock!

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Elektrische Sicherheit des Black Box LWU Produkts
Das Black Box LWUist eine Klasse 3B Lasereinrichtung.
Das Black BoxLWUProduktwurdegeprüftundentsprichtdenAnforderungender
Europäischen Standards EN 60825-1:1994+A11:96+A2:2001(Lasereinrichtungen),
EN 60950-1:2001 (Elektrische Sicherheit),
EN 55022:1998+A1:200+A2:2003 Klasse 3B (EMV, Störaussendung) und
EN55024:1998+A1:2001+A2:2003sowieEN61000-6-2:2001(EMV,Störfestigkeit)
DerLaserstrahlwirdvonderSendeoptikdurchdieGlasscheibeanderFrontseitedes
Laserkopf mit einer Divergenz von weniger als 10mrad abgestahlt. Es sind keine
weiteren Blenden vorhanden durch die Laserstrahlen auftreten können.
Warnung!
Unsichtbare Laserstrahlen! Nicht direkt in den Lasertrahlschauen,
da dies die Augen permanent schädigen kann. Der
Sicherheitsabstandvariiert mitder Laserleistungund Divergenzdes
Laserstrahl. Details hierzu sind im Datenblatt nachzulesen.
Das Black BoxLWUProduktmußsoinstalliertwerden,daßniemandZutrittzuder
OptikdesLaserkopfhatoderzufälligindenBereichdesLaserstrahlkommenkann.
Kapitel5.3.5aufSeite 20 desHandbuchsenthältausführlicheAnweisungenzum
Schutz der Augen.
Das Black BoxLWUProdukt ist mit allen notwendigen Warnhinweisenversehendie
durchdieStandardsvorgebenenwerden.WeitergehendeHinweisesolltenangut
sichtbarenStellenangebrachtwerdenwomansichdemLaserkopfgefahrlosnähern
kann.DiePositionenderWarnhinweisesindaufSeite20desHandbuchsdargestellt
(Kapitel 5.3.5, Schutz der Augen)
Die„Outdoor InterconnectionUnit“,diemit einemzertifziertenNetzkabelausgeliefert
wird, muß mit der Stromversorgung verbunden werden, indem der Netzstecker in
eine geeignete Netzsteckdose gesteckt wird, womit die Lasereinrichtung auch
jederzeit wieder vom Netz getrennt werden kann. Jegliche Modifikationen an der
Installation sind verboten.
Falls aufgrund nationaler Vorschriften denoch Änderungen an der Installation
vorgenommen werden müssen, ist vorher der Hersteller zu befragen.
Um die Konformität bezüglich der Elektrischen Sicherheit nach EN60950
sicherzustellen, sollte das System nur vom Hersteller oder seinen zertifizierten
Partnern installiert werden.
Warnung !
Die Inbetriebnahme oder der Betrieb desBlack Box LWUProdukts,
abweichend von den Vorgaben dieses Handbuchs, kann
unerwünschte Laserstrahlung verursachen und gefährlich für die
Augen werden oder einen elektrischen Schock verursachen.

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Sécurité de produit Black Box LWU
Le produit Black Box LWU est classifié dans la catégorie
laser3B.
Le système de Laserbit a été testé et correspond aux normes européennes:
EN 60825-1:1994+A11:96+A2:2001 (sécurité du laser),
EN 60950-1:2001 (sécurité éléctrique),
EN 55022:1998+A1:200+A2:2003 Classe 3B (émission),
EN 55024:1998+A1:2001+A2:2003 et EN 61000-6-2:2001 (immunité).
Laradiationlaserestémiseàpartirdel’émetteuroptiqueàtraversunefenêtreen
verre placée à la tête du laser et a une divergence de moins de 10 mrad. Aucune
autre ouverture dans la tête ne peut laisser passer de radiation laser.
Attention!
La radiation laser est invisible! Interdiction de regarder le rayon
laser! Risques graves de lésions pour les yeux! La distance de
sécurité pour la vue est variable et dépend de la puissance du
rayon et de sadivergence! Consulter lafeuille dedonnéesci-jointe
pour calculs exacts.
L’installation de produit Black BoxLWU doit être faite de sorte que personne ne
puisse accéder à la fenêtre optique ou traverser le rayon laser par accident. Pour
instructionsdétaillées,lirelapartieSécuritédel’œildanslechapitre5.3.5dumanuel
à la page 20.
Le produit Black Box LWU possède la totalité des étiquettes stipulées par les
normes.Deplus,desavisinformatifssont placésàdesendroitsclairementvisibles
oùle rayonlaserpourraitêtre accessible.Unelistedesendroitsoùsont placésles
avisinformatifsestdonnéedanslechapitre5.3.5dumanuel(EyeSafety)àlapage
20.
Leboîtierdeconnectionsextérieure(OutdoorInterconnectionUnit)estfournitavec
unfiléléctrique certifié par lequell’appareilestconnectéàla prise decourant.Grâce
àcela,ilest possible de débrancher àn’importequelmoment.Ilestformellement
interdit d’apporter de quelconques modifications à cette installation. Si une
modificationest cependantnécessaireà causedesnormeslocales,contacterle
fabricant.
Attention!
Tout opération consistant à utiliser le produit Black Box LWU de
façon différente que celle indiquée dans le manuel pourrait
engendrer des effets indésirables du rayon laser, être dangereuse
pour la vue et provoquer un choc éléctrique!

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Sicurezza dei prodottiBlack Box LWU
BlackBoxLWU eclassificátodiessereunClasse3Bprodottodi
lazer.
Il sistema Laserbit e stato collaudato e trovato conforme con
EN 60825-1:1994+A11:96+A2:2001 (sicurezza sul prodotti lazer),
EN 60950-1:2001 (sicurezza eletrica), EN55022:1998+A1:200+A2:2003 Class B
(emissione) ed EN 55024:1998+A1:2001+A2:2003 ed
EN 61000-6-2:2001 (immunitá), Norme Europee.
Laradiazionelazervieneemissadallaotticadeltrasmettitorevialafinestradivetro
posizionatasullafrontedella testa di lazer conunadivergenzaminoredi10mrad.
Non esiste nessun’ altra appertura attraverso quale radiazione di lazer puó
presentarsi.
Avvertimento!
Radiazione lazer invisibile! Guardando direttamente nel raggio di
lazer puó causare danni permanenti degli ochhi! La distanza di
sicurezza dello sguardo varia secondo la potenza e la divergenza
dello raggio di lazer. Distanza di sucurezza viene communicato
sulla pagina tehnica allegata.
Prodotti Black Box LWU devono essere installati in tale maniera, che nessuno
possa accedere la finestra ottica o esporsi al raggio di lazer per caso. Per
informazioni piu detagliati vedi la parte Sicurezza Ochhi del capitolo 5.3.5 nel
manuale sulla pagina 20.
I prodottiBlackBoxLWU verannoforniticontuttesegnalazioniprevistenellenorme.
Inaddizionesegnalazioniinformativedevonoessereposizionatenelpostiben’visibili
dove il raggio di lazer puó essere accesso. Le locazioni delle segnalazioni di
sicurezzesonodemostratisulla pagina 20delmanuale(Capitolo5.3.5/Sicurezza
Ochhi)
LaUnitá InterconnezioneExterna(Outdoor interconnectionUnit)vienefornitaconun
cavodiallimentazionecertificatoqualedeveesserecollegatoconlaretedipotenza
tramitte una presa per assicurare la separabilita in qualsiasi momento. Qualunque
modifica sul questo impianto e proibito. Se modifiche si devono eseguire per
rispettare la norma locale, si priega di contattare il produttore.
PergarantirelaconformitáconlanormaEN60950,ilsistamedeveessereinstallato
dal produttore o dai partner certificati.
Attenzione!
Qualsiasi operazione di Black Box LWUdiversa di quello descritto
in questo manuale puó causare non desiderata radiazione lazer e
puó essere pericoloso per gli ochhi o causare scossa electrica!

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1Table of contents
1Table of contents________________________________________________________ 6
2Introduction ___________________________________________________________ 7
2.1 What is FSO?______________________________________________________ 7
2.2 OpticalFree-space Transmission______________________________________ 9
2.3 Typical applications________________________________________________10
2.4 About the place where Black Box LWU is producedError! Bookmark not defined.
3The product BlackBox LWU_____________________________________________11
4Content of the package__________________________________________________13
5Sites of installation _____________________________________________________13
5.1 Key factors of operation ____________________________________________13
5.2 Preferredinstallationsites __________________________________________ 14
5.3 Direct sunshine____________________________________________________15
6Eye safety ____________________________________________________________15
7The mounting bracket __________________________________________________16
8System installation _____________________________________________________17
8.1 On the table test___________________________________________________17
8.2 How can you install the ODIU? ______________________________________ 18
8.3 Fixingtheheads ___________________________________________________20
8.4 Alignment of the heads _____________________________________________21
8.5 Connecting to your Network ________________________________________23
9Warranty conditions____________________________________________________24
10 Appendix A_________________________________________________________25
a. Product registration form_____________________________________________25
b. Failure report form __________________________________________________26
c. BlackBox LWUData Sheet ___________________________________________27

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2Introduction
2.1 What is FSO?
FSOis freespaceopticsp rovides point-point broadband communications using
Laser Light as the transmission medium.
FSO is a state of art data communication method which is based on a very old
communicationsolution.AncientChinesedevelopedaprotectionsystemagainstthe
Mongol tribes, building watchtowers within the line of site to other towers. And as
soon as the towers saw some hostile sign on the horizon they use they shield to
reflectthesuntotheremotetowers.Inthiswaytheareacouldbepreparedagainst
the attack in a very short period of time.
Inthe ancienttimesforthis communicationusethemirror
asatransmitterand the sunlight was the light source,and
the receiver was the remote guard’s eye. This basic
signalling method was developed later into up
communication device which used „line coding”. This
allowed the guards to tell the number of enemy, or the
direction they are coming from.
CurrentFSOsystemsusealaser-diodeasalightsource,
and a receptor diode (photo diode) to receive the signals
comingfromthelaser diode from the transmitter side. But
thebasicelementsare still the same: line of sitebetween
thecommunication nodes, and individualline coding. Itis allabout performance.
Black Box offersFSO systems with the highest power budget available on the
market.
Why is it important?
Because of in the ancient Chinese times, the rain, the fog, or even the cloudy
weather, could impact the operation of the whole system.
In the FSO units, comprising light source and receiver the cloud problem was
solved, but development conditions still can impair
performance.To go throw the rain, the fog, or snow you
needmoreandmorepowertobeseenfromtheremote
side.Achievablepowerlevelsarelimitedbyanumberof
factors including eye safety.
In this way there is no other choice to see more than
„training the eye”. Making the receiver more and more
sensitivetosensedelightemittedfromtheremoteside.
BlackBoxoffershightransmitpowerandalsoveryhard
receiver sensitivity. These two factors combined to provide one of the best
performing FSO systems on the market today.

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This manual describes theBlackBoxLWUproductoffreespacelasertransmission
system.
The Black Box LWU product offers cost effective reliable free space laser
transmission for100Mbpsdatatotheair,whereacleanline of site is available. It
deliversthemosteffectivepoint-to-pointconnectionbetween computernetworksor
telephone exchanges.
No need for installing cables, no rental costs, no licensing requirements.
Ideal for urban areas or city centres, where the use of these lines are expensive.
Suitableforfactoriesorindustrialenvironmentswherehighnoiselevelcaninterfere
withthetransmitteddata. The best choice tomakeaconnectionacrossriversand
othern atural or artificial obstacles, where cable is not available.
The transmission technique used in the Black Box FSO devices provides
transparent and wire-speed data transfer with virtually zero latency. Because they
use infrared light as the transmission medium, Black Box LWU system do not
requirefrequency licensesandthetransmission isnoteffectedbyelectro-magnetic
orradio-frequency interference. Basically theBlack BoxLWUlink canbeconsidered
as a virtual fibre in the air, which ends in real fibreoptic cable at both ends.
Our product is built using high quality components for operation in even the most
adverse conditions.
Metal housing gives robust, waterproof environment for the electronics.
Theshieldprotects the device from direct sunlightandprovidesextraairisolation.
The Black Box LWUsystems comprise two laser-heads and the two indoor
interconnectionunits(OIU)-one at each end. The interface connections are housed
in the outdoor unit together with the PSU of the system.
Bestpractises wereemployedincostengineeringthroughoutthedevelopmentof
Black Box LWU.

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2.2 Optical Free-spaceTransmission
Theprincipleusedinfreespacelasertransmissionisverysimilartotheoneisused
forfibreoptictransmission.Thedifferenceiswhilefibreopticdevicesuseelectronics
andopticsoptimizedfortransmissiontotheair.Alsoonecanobservetothesimilarity
inthetransmission properties. Nogalvaniccontact,noground-loops, no needfor
surge protection, noise immunity, long distances,high bandwidth.
What makes it unique –and difficult to design –is that it does not require any
transmission medium like fibre or copper, but it has to cope with the dynamically
changing parameters. For instance while the attenuation of an optical fibre is
constant, the attenuation of the atmosphere between the laser units can change
dramatically (depending on the weather conditions).
Thelaser-headsareusuallyplacedontopofbuilding,wherethecleanlineofsiteis
guaranteed and the beam cannot be interrupted.
In the head the incoming signal is amplified, encoded, and then drives the laser-
diode.Thetransmitteropticsassurestheproperbeamshapeandcontrolsthebeam
divergence. The receive optics perceives and directs the transmitter signal to the
photodiode.Thediode converts it back intoelectrical,thanitisdecoded,amplified
and converted.
There are several things that can influence the quality of transmission. We can
classify those factors into three main groups.
System conditions-transmittingpower,transmitter’swavelength,beamdivergence,
receiver optics diameter, receiver sensitivity, parameters of optical system and
casing.Theseparametersdeterminethesystem’scharacteristicatacertaindistance
and are controlled by system design and factory set up.
Weather conditions-molecularabsorption,particle scattering andturbulence.These
elementshavegreateffecton the operational conditions of the system. Wedonot
have very much influence on them; proper product selection can eliminate the
undesirable effects.
Environmental conditions-buildingmovements,directsunlight,refractivesurfaces.
Thesearealsokeyfactorsrelatedtotheinstallationsitesandcanbecontrolledby
appropriate site survey and system installation

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2.3 Typicalapplications
Most typically the Black Box LWU is used to interconnect LAN-s. The system is
protocoltransparent, thusotherapplications alsocanbetakenintoconsideration.
Appropriateinterfaceconvertersareneededandsystembandwidthmustbe matched
for that.
Here we collected some circumstances, where the employment of theBlackBox
LWU is the most adequate and cost effective solution.
Thoseare:
Areas with natural or artificial obstacles
Where cable is actually not an alternative, like across
rivers or railways or in rugged terrain.
Urban areas
Where only leased lines are available with
limitedspeed,andhighrentalcost.WithLaserbit
links you can establish on line LAN-to-LAN
connections.
Industrial areas
Where you have noisy environment with high EMI or
RFI.Factorybuildings,airportobjectscanbeconnected
through laser link.
ISP connections
Where high bandwidth is required. ISP’s can
offer high-speed links to their customers or
trunks can be established between ISP’s
instead of expensive leased lines.
Corporate
LAN
ISP

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3The productBlack Box LWU
The Black Box LWUseries products fromBlack Box set a new standard for Free
SpaceOpticaltransmissionsystems. They provide simple and easy toinstallation
solution that is unique in laser based networking. This new range of products
incorporates a lightweight, compact mechanical design with a factory-set optical
system,whichallowsend-userstobenefitfromsimpleandquickinstallation.The
Black Box LWU ismore competitively priced than 2.4 GHz radio solutions and the
bandwidth provided can be about ten times higher.
Black Box LWU range offers cost effective, reliable and secure laser based free
spaceopticaltransmissionforlocalareanetworks (LAN)atfullduplexFastEthernet
wirespeed.Thetransmissioncarriesdatausingaconcentratedlaserbeamanda
unique modulation technique is employed to ensure error free data transfer over
distancesofupto200meter.Transparentandwirespeeddatatransfertogetherwith
virtually zero latency ensures that the Black Box LWU system can be easily
integrated into any environment. TheBlackBoxLWU series use laser light as a
transmission medium. As with allBlack BoxLWUsystemsthismeansthatfrequency
licenses are not required and transmission is not affected by electro-magnetic
interference.Thedatatransmissionviaalaserbeamissecureasitisextremelyhard
tointercept,andcannot be detected by spectrumanalysers.InthecaseofaBlack
Box LWU system the laser link is considered a “virtual” fibre in the air.
The Black Box LWU system comprises of two Laser Heads, two Outdoor
Interconnection Units (OIU) and two sets of interconnection cables—one at each
end. The Laser Heads are installed outdoors, usually on rooftops or sidewalls of
buildings,where a clear optical pathexists between the twosites. Next to the head
theOutdoorInterconnectionUnitprovidesfastandeasyinterconnectionbetweenthe
laser head and the cable coming from the network equipment. Moreover the OIU
houses the Power Supply Unit (PSU) of the system and the network interface. The
PSUprovidesthelowvoltagepowerrequiredtooperatethelaser.EachBlackBox
LWU headcontainsbuilt-intransmissionmonitoringservice,whichfeaturesavisual
signalstrengthindicatorandLINKstatusinformationaccessibleontherearsideof
the head assembly through a window. In addition Black Box LWU units are
equipped with optical aid to target the remote head easily. All that makes the
installation real fast and easy even for people who have never dealt with FSO
equipment before
By utilizing IEEE, and ITU standard compliant interfaces BlackBoxLWU system
protectsthecustomers’investmentsinlong-termprojects.Providesfastandeasy
connection for Fast-Ethernet, or PDH computer or telephone networks.

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The TP system layout
The TP systems should be considered as repeaters in the network. So the
installationdistancebetweentheheadandthenetworkdeviceis100m.Thedistance
on a back to back site is maximum 5 meters, between the heads.
Thehead needsapowerand datacable,whichisconnectedtothe ODIU(Outdoor
InterconnectionUnit).Therequiredpowerfortheoutdoor unit is 230VAC or 115VAC,
dependingontheorder. Please note that thetransformerisnotaswitchingmode
powersupply,sohasto be configured for the proper voltage beforeconnection,this
has to done before shipment. The heads are fixed 100Mbps and are auto-
negotiating.

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4Content of the package
For theBlack Box LWUsystemsBlack Box provides all the
necessary accessories to fix the head to the bracket, fix the
Powersupplyunitandthebracketto thewall,belowyoucansee
what is provided in theBlack Box LWUpackage.
•2ps of Black Box LWUheads
•2ps of Black Box LWU ODIUs (Outdoor Interconnection Unit) /thetwo
grey plastic boxes/
•ODIU accessories:
o 2ps of 276x110x1,5 metal plates
o 2x4ps of 6x40 spacers
o 2x4ps of 6x15 spacers
o 2x4psofM6x70flatsphereheadedscrews
o 2x4ps of M5 nuts
o 2x4ps of spring washers
o 2x4ps of washers
o 2x4ps of ø8x48 wall plugs
o 2x4ps of M4,5x70 cross headed self-
tapping-screws
•2psof mounting brackets for BlackBox LWUheads /a camera consollike
grey, metal appliances/
•a manual CD
•bracketaccessories bag contents see
below:
o 2x3psofM6x90self-tapping-bolts
o 2x3ps of ø10x80 wall plugs
o 2x2ps ofM6x90tangentbolts(for
vertical fine alignment)
o 2x3ps of M6x25 bolts
o 2x3ps of M6 nuts
o 2x6ps of 6mm spring washers
o 2x6ps of 6mm washers
5Sites of installation
5.1 Key factors of operation
There are four key issues that the site survey has to shed lighton. Proper system
operation cannot be guaranteed without satisfying all of the four requirements.
Clear line of sight -Theentireopticalpathbetweenthetwoendsmustbefreeof
any obstacles. It not only means that one has to see the other side, but other
possiblesourcesofdisturbanceshouldalsobetakenintoconsideration.Forexample
there might be turbulence above the roofs and other constructions, and this can

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causefraction or scattering of the beam or snow accumulation on roofs too close to
the beam can influence or even interrupt communication.
Solid mount surface -is the key for long-termoperation.Sincethediameterof
thebeamis limited, it is extremely importanttomount the unit on a stablestructure
with the possible smallest movement.Thiswaythereceiveroftheremoteunitcannot
get out of the beam due to the movement of the opposite head.
East-West orientation -althoughthereceiveropticsareequippedwith optical
filterstoprotectthereceiverdiode from the effect of undesired light sources, direct
sunshinecancausesaturationofthediode.This prevents the system from working
properly for several minutes a day at certain times of the year. In most cases this
effect can be avoided by careful selection of the mounting spot.
Inordertocomply with therequirementsofthesuccessfulinstallation-including the
discussedfourkeyfactors and other criteria-thefollowingmattersshouldbetaken
intoconsideration.
5.2 Preferred installation sites
Allbuildingsandconstructionshaveacertainmovementoftheirown.It’sdetermined
bythestructureandmaterialofthebuilding.Metalstructurescan shift or twist due to
temperaturechanges.Woodenconstructioncanexpandorshrinkwithanychanges
in humidity. Give preference toconcrete or brick buildings. Onthe other hand high
structuresliketowers,skyscrapersorpolesarealwayssubjecttomovement.Mount
thesupportframetowallsofthebuildingornearcorners,astheyarethemoststable
spots.Useappropriateconsoles forwallmounting.Ifastandisusedonthetopof
building, secure it directly to the ceiling or to the concrete cornice wherever is
possible. Donotfixstandstoinsulatingmaterialsastheycanslowlysinkunderthe
weightoftheunitandwithtemperature changes. Big chimneys and smokestacks
maylook stable, but as their inner temperature varies they canalso move. Vibration
causedbyheavytraffic,trainsandelevatorsetc.mayslowlymovethesystemoutof
itsspecifieddirection. Another importantconsiderationistoprovideenoughspacefor
alignment and to have the potential for future maintenance.
Preferred installation
sites Pay attention to Avoid (*)
Concrete wall Behind window Soft materials
Brick wall Old constructs Chimneys
Microwave towers Wooden constructs
Metal masts or Frames
Hidden heat isolations,
like Styrofoam
(*)
In cases where installations are listed under “AVOID” cannot be avoided than special mounting
accessories to be designed and special installations must be used.
Itisnotonlythebuilding that has to be solid, but thesupportstructuretoo.Antenna
polesand security camera holders arenot suitable for theBlack Box LWUunits.

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5.3 Direct sunshine
Topreventthesunshiningdirectly
into the receiver optics, first one
has to determine the orientation of
the link. Try to avoid East-West
orientationwherever itispossible.
Examine both sides of the link at
sunset and sunrise and find a
positionwherethesuncannotget
behind any of the heads. Be aware
thatthe path of the sun is changing
throughout the year.
6Eye safety
Therearenotwoinstallationspotsofthesamekind,thebuildingsorstructures,the
available space and the accessibility of the place will be different in each case.
Nevertheless, as a generalrule it is veryimportant to select the installation site so
that nobody can look directly into the transmitter. For this reason place the head
eithersohigh(on the side wall of thebuilding)or so close to the edge ofthebuilding
(onaparapet on therooftop)thatnopersoncanapproachitaccidentallyandcanget
intothebeampath.Setupbarriersifnecessaryandputwarningsignsatprominent
places.
Thelaserheadsareprovided with all labels and hazard warnings requiredbythe
laser standard. There are warning labels on both the left and right side of the
protectivecovernexttotheopticalwindowandthereisawarningandaninformative
label on the rear side of the laser head.

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7The mounting bracket
Black Box provides themountingbracketandallthenecessary components for
Black Box LWUunits. A simple fixing technique of this bracket can be seen on
the following figure, required tools are as follows:
-drilling machine
-10 mm wrench
Bracketsizes:
Length: 329mm
Leg Width: 209mm
Head Width:100mm
Drill size: 10mm wall drilling
Installation steps:
•Place the bracket on the wall
•Mark the wall with a permanent marker
•Use your 10mm wall drill to drill all of the holes into the wall
•Clean the holes
•Place the wall-plugsintothe holes (pleasenotethatsometimesyouneedto
use hammer to put the wall-plugs into the hole, if you have to please be
careful not to break the wall-plug )
•Place the bracket to the wall an line it up to the holes
•Put the screws into the wall-plug through the hole on the leg of the bracket
(please see the figure above)
•Tighten up the screws
Packet list for the bracket:

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8Systeminstallation
8.1 On the table test
Warning!Donotlookeitherintothetransmitterorthereceiveropticsbecauseat
this distance even the reflected laser beam can be dangerous to your eyes.
Operatingthesystemonmuchshorterdistancethanpresumedoriginallycancause
saturation or even permanent damage to the receiver. Always use optical
attenuators for this kind of test.
The on-the-tabletestneedscarefulplanningandcarefuluseduringthetestperiod.
The units should be placed at about 2 m distance from each other with optical
windowsfacing oneanother.Put anappropriateopticalattenuator(Attenuatingfoil
orcardboardwithseveralsmallholes)betweentheheads.Makeallthenecessary
connectionasdescribedbelow to connect your network equipment (computeror
protocol analyzer) to the heads and power up the units. Turn ON the Outdoor
Interconnection Units and check if the power LED is ON on the head.
Youshouldbeableto align the units without anytoolandgetfullreceivedlevelon
thesignalstrength LED’s. Make sure thatthe“Saturation” indicator is OFF. Adjust
your attenuators if necessary to avoid saturation of the receivers.
Pleasenotethatatthisshortdistance,speciallythelongerdistancelinkscanreflect
to the remote site or even to the same head. If you experience full receiving level,
withnotraffic throughput, in that casetryto move the heads slightlyunits out of the
reflection zone.
Pleasealsotakeinconsiderationthatthelaserbeamisconcentratedandinsucha
shortdistancecanharmyoureyes,everytimeyoutesttheunitsonshortdistance,
doitwithextracare.Neverlookintothesightingd eviceifthe remote laser is turned
on.Westronglysuggestto double check the power connection before youturnon
the device. Handle the power connection with extra care. Safety first.
After obtaining the desired received level, check the data connection between
devices. Using computers or appropriate testing devices.
Onthetabletestsareperfectfortroubleshooting(Ifthereisatransmissionproblem,
check the status of the connecting devices (e.g. Link signal or cable polarity) and
cables.) in a controlled area. If you experience some problems during the test,
please try to test the connected equipments with a direct connection.

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18
8.2 How can you install the ODIU?
Functionalities of the ODIU
The outdoor interconnection unit (ODIU) provides the power supply and data
connection for the head. The power connection (+8VDC, GND, -8VDC and
+30VDC).
TheODIUmade from poly-propyleneenforcedwithfibre.Thisconstructionprovides
robust shock and waterproof environment (IP65) for the electrical devices.
Thetransformerisanotswitchabletransformer,sothemainvoltagemustmatchto
the one marked on the front cover. If the main power is different then this can
damage the transformer.
IntheODIUthere can befoundfourfuses,twoforthe transformerandthe othertwo
for the head.
Fuses
On the primarily side, the fuse ratings are: T0.8A (250V)
On the secondary side, the fuse ratings are: T4A (250V)

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19
Installing the ODIU box
The physical fixing of the ODIU box can be seen below.
Necessary toolkit:
•Philips screwdriver
•5mm wrench
•DrillingmachinewithanØ8mmbit(theminimumeffectivelengthis50mm)
First you have to fix the ODIU box to the metal plate:
•PickthefourM6x70flat sphere headed screws, and take them totheholes
on the corners of the box
•On the back of the box, where the screws came out, you have to put up the
four 6x40 spacers (these are the longer ones) to the legs of the screws
•Pull on the metal plate to the legs of the screws
•FixthemetalplatewithfourM5nuts usingthefourwashers, and fourspring
washers like in the figure
Then you can fix the whole construction to a wall:
•Drillfourholes,usingthemetalplateformeasuringtheplacesofthebores,
with a Ø8mm bit. The depth of the bores have to be a minimum of 50mm
•Put the four wall-plugs into the four holes
•Put the four M4,5x70 cross
headed self-tapping-screws
through the four free holes of
the metal plate
•Pull up the four 6x15 spacers
(theshorterones)tothescrews
•Tight the screws into the wall-
plugs, and tight it up as strong
aspossible for the appropriate
fastening
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Connecting the head to the ODIU, and the ODIU to the power
supply
Ensure that the cables are connected as it seen below.
Forthepowerconnectionrecommendedtouse
three-wiredØ0,75mmcables.The order of the
connection can be seen on the figure.
•P –Phase
•G –Ground
•N -Neutral
Thenecessary powercanbesupported totheheadby
the connector which can be seen in the figure next to
this text. Order of the cables from the head: (the four-
twisted-pair-wired cable)
•Brown-White-+30V
•Orange-White -+8V
•Green-White -GND
•Blue-White --8V
8.3 Fixing the heads
YourBlack Box LWUhead can be fixed
to its stand with the three M6x25 bolts.
On the figure you can see a plinth of a
Black Box LWU unit, a head of a
Black Box LWUmounting bracket, and
thenecessaryfixing parts. Thestepsofthe
fixing are:
•First place the head to the stand
•Place the bolts into the holes which
is easily accessible for the
installation and the two cuts
•Place up the washers and spring
washers
•Fix the bolts with the nuts
Afteryouputupthewashersandthenuts,donotscrewthenutsuptightbecauseof
the comfortable positioning (see the chapter of Alignment).
After the fixing, place the two M6x90tangentboltsinto the twoofthefourholeson
the corners of the plinth. The important is that the bolts have to be in opposite
corners. You can do the vertical fine alignment with these bolts.