Masterclock TCR1000 Spezifikationen PDF herunterladen (Seite 88)

Masterclock, Inc.



phone(USAandCanada):1‐800‐940‐2248|phone(international):+1‐636‐724‐3666

email:[email protected]|online:www.masterclock.com



2.3.1NETWORKCLOCKENGINEERINGGENERALSPECIFICATION

Thenetworkclocksshallbedesignedtoprovideyearsofreliableandmaintenancefreeserviceandshallbeconstructedof

allmetalenclosureswithhighimpact,UVstablelensestoensurestructuralintegrityandmaximumdurability.Awall

mountingbracket,orothermeans,

shallbeprovidedformountingtothesurfaceofawall.Thefinishofthenetworkclocks

shallbeofahighquality,durable,paintedtexturedpowdercoatfinishandavailableinachoiceofcolors.Thenetwork

clocksenclosureshallbeavailableinoptionalunpaintedstainlesssteelmaterialandfinish

forspecialapplications.

Thenetworkclocksshallbeavailableindoublefacedordualmountoptionsforapplicationsinhallwaysorcorridors.

Thenetworkclocksshallbedesignedforeasy,costeffective,andreliableinstallationandusestandardRJ45,10MB

Ethernetstyleconnectors.



Accuracy:

Thenetworksclockdisplaysshallbe

accuratetowithin50millisecondsoftheUTCtimereferenceprovidedbytheNTP

server(s),whensynchronized.



Protocol:

TheEthernetwiredclocksshallsupportthefollowingprotocols:



SNTP,SimpleNetworkTimeProtocol

ThenetworkclocksshalloperatewithaninternalreferencetimethatissettoUTC(UniversalCoordinated

Time)viaa

built‐intheSNTPclient,fromuptotwoNTPtimeservers.Selectionoftheprimaryandsecondaryserversshallbeautomatic,

butconfigurablebyeitherstaticIPaddressorDHCPprovidedIPaddressconfigurationmethods.Thenetworkclocksshallbe

configurabletooperateasanSNTPclient

inthefollowingoperationalmodes:unicast(orquery),broadcast,or

multicast.



DHCP,DynamicHostConfigurationProtocol

ThenetworkclocksshallutilizeDHCP(DynamicHostConfigurationProtocol),bydefault,asameansofautomatingthe

configurationofallrequirednetworksettingsutilizingtheoptionalsettingsareaofaDHCPserver.All

DHCPnetworkand

optionalNTPsettingsshallallowforenablingordisablingateachclock,inordertousestaticIPaddress

modenetworkandNTPsettings.



Power:

ThenetworkclocksshallutilizeastandardizedPoweroverEthernet(POE)technologytopowertheclockincompliancewith

theIEEE802.3afPower

overEthernetspecification.Thenetworkclocksshallbeconsideredtobeandtooperateas

PoweredDevices(PD);andshallutilizea48VDCnominalvoltagesuppliedoverthespareEthernetnetworkcablepairs,

and/ortheshareddata/pairs,fromanIEEE802.3afcompliantPowerSourcingEquipment(PSE)device,witha

10/100MB

rating,foradistanceofupto100m(328ft).Powerconsumptionshallbelessthan12.95WattsmaximumforallPD

equipment.EachnetworkclockPDshallhaveatypicalpowerratingoflessthan7.5W.



Thenetworkclocksshallbemadeavailablewithanoptional

ACpower.Thepowerinputshallbemadeasauniversaltype

withaninputpowerrangeof90‐264VAC,47‐63HzandutilizingastandardIECpowerjack.



Connectors:

Ethernet10/100Base‐T:RJ45

ThenetworkclocksystemshallutilizestandardCat5orCat6cabling

forthedistributionofeitherdata,ordataandpower

usingthesamestandardcable,andeliminatingtheneedforanACpowersourceattheclocklocation.



Configurationsettings:

ThetimedisplayedonthefaceofthenetworkclocksmayeitherbeUTCtimeorlocaltimeandshall

beconfigurablevia

software.ClockdisplaysshallofferflexibilitytoallowforanyinternationaltimezoneoffsetandautomaticDaylightSaving

Time(DST)adjustmentandshallprovidemaintenancefreereliableoperation.Configurationchangesshallberetainedin

non‐volatileflash.Thenetworkclocksshallutilizeaninternalmaintenancefreerechargeablebattery

backedreal‐timeclock

(RTC)toretaintheinternaltimeintheeventofapoweroutageorforconditionswhentheNTPserver(s)isnotavailable.

Thenetworkclocksshallnotdisplaythetimeduringapoweroutage,butshallrecoverfromsuchpoweroutageasa

systemwithout

intervention.Duringsuch“free‐wheeling”periodsandwhileinoperation,thenetworkclocksshallprovide

avisualindicationthatthedeviceisrelyingontheinternaloscillatorandisnotcurrentlysynchronizedtothenetwork

timeserver.



2.3.2ANALOGCLOCKENGINEERINGSPECIFICATION

Theshapeoftheanalogclockshallberound12”

[30cm]or18”[46cm].Thefaceoftheclockshallbeoff‐white,thetime

indicationmarksonfaceshallbeblack.ThehourmarkingsshallbeinanArabicnumeralformatandinaneasilyreadfont.

Minute/secondmarkingshallbeprovided.Theanalogclockshallhaveblackhourandminutehandsandaredsecondhand

indicator.



Theanalogclockshallcontainasteppermotordriveandstateoftheartmicroprocessorandelectronicscontroltorapidly

synchronizethehandsonthefaceoftheclocktoanaccurateNTP(NetworkTimeProtocol)reference.Thestepper

motor

driveandgearsystemshallbeofallmetalconstructionforlongmaintenancefreelifeandhighproductreliability.



1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 97 98

Kommentare zu diesen Handbüchern

Keine Kommentare

Masterclock TCR1000 Spezifikationen Seite 88

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Nein Masterclock TCR1000