Data sheetH-5439-8200-01-A

OMI-2T optical machine interface

www.renishaw.com/omi-2t

The OMI-2T is a combined optical transmitter/receiver and machine interface, designed for mounting within the machine’s working envelope. The OMI-2T operates using a ‘Modulated’ optical transmission mode and is compatible with machine

probes that also operate in ‘Modulated’ mode.

Features

• Twin probe system

TheOMI-2Tiscapableofoperatingtwocompatibleprobes

sequentially.

• Modulated transmission

Effectsoflightinterferencearereducedwhichinsome

circumstancescouldcausefalsetriggersignals.

• Visible probe diagnostic LEDs

LEDsprovideavisualindicationofsystemstatus

andidentifiestheactiveprobe.

• Mounting bracket

Theoptionalmountingbracketallowsdirectionalsetting.

• Toughened glass window

• Fully sealed to IPX8

• User configurable outputs

Probestatus1SSR NO/NC,pulsed/level.

Probestatus2SSR NO/NC.pulsed/level.

ErrorSSR NO/NC.

LowbatterySSR NO/NC.

• Range selection

Start(Tx) 50%or100%.

Reception(Rx)50%or100%.

Bothfactorysetat100%.

• Start inputs

Levelmachineinputsdefinetheactiveprobe.Whenthe

respectiveinputisactive,theprobeisswitchedon.

Ifbothinputsareactivethesystemwilldefaulttoerror.

Operating features

Switch on/off method

TheOMI-2Toperatesusingonlyopticalon/opticaloffasthe

switchon/offmethod.

Opticalon/opticaloffisavailablewithallRenishaw’sOMP

rangeofspindleprobesandtheOTStoolsetterprobe.

Timeout,spinon/offandshankon/offoptionsarenot

compatiblewiththeOMI-2T.

Start up times

Innormaloperationthestartuptimeofeitherprobe(as

reportedbytheOMI-2Terrorsignal)is410msmaximum.

Theturnofftimeis0seconds.

Normaloperationreferstowhentheon/offstatusofthe

probesisinsynchronisationwiththereceiveron/offstatus.

Theactiveprobeshouldcorrespondtotherespectiveactive

systemLED.

WhenchangingfromProbe1toProbe2,orProbe2to

Probe1,allow1secondbetweenthecancellingofone

machinestartinputandraisingoftheotherstartinput.

Synchronisation recovery

Underabnormaloperatingsituationsthesystemmaylose

synchronisationbetweenthereceiverandprobes.Aninternal

synchronisationrecoverywillbeinitiatedwhenthenext

machineinputisactivated.

continuedonnextpage:

Data sheetOMI-2Topticalmachineinterface

1 2 3 4

5

6 6

The OMI-2T is compatible with machine probes operating in ‘Modulated’ mode

Inspection probeOMP40-2/OMP60/OMP400

(OMP40-2shown)

Workpiece

OMI-2T opticaltransmitter/receiver

andmachineinterface

CNCmachinecontrol

OTS tool setter probe

Mounting bracket(optional)

Operating features (continued)

Synchronisation recovery

Themaximumtimeforsystemrecoveryfromanabnormal

operatingsituationis3.5seconds.

Suchatimedelaycouldcauseamachinealarmifcontrollers

requirereadysignalswithinatimeoflessthan3.5seconds.

OMI-2T optimum position setting

ToassistfindingtheoptimumpositionfortheOMI-2Tduring

systeminstallation,signalconditionreceivedisindicatedon

thered/yellow/greensignalconditionLED.

TheOMI-2Tmayhavetobeshieldedfromdirectlightsources

TheLEDindicationofablue,yelloworvioleterrorcondition

resultingfromthelossofagoodprobesignalwillpersistuntil

theactivesysteminput(Probe1orProbe2isdeactivated.

WARNING:

Iftwosystemsareoperatingincloseproximity,takecare

toensurethatsignalstransmittedfromtheprobeonone

machine,arenotreceivedbytheOMI-2Tontheother

machine,andviceversa.

OMI-2T status LEDs

AvisualindicationofsystemstatusisprovidedbyLEDs.

1. Start signal LED (yellow) FlashesoncewhenamachineinputSTARTsignalis activated.

2. Low battery LED (red) Red - Batterylow Off - BatteryOK

3. Probe status LED (green, red) ThisLEDislitwhentheOMI-2Tispowered. Green- Probeseated. Red - Probetriggeredorunknownstatus.

4. Error LED Indicatesatransmissionerrorcondition.

Red - Noprobetransmittingorprobeoutofrange. Blue -Amodulatedsignalfromasecondprobehas

beenreceived. Yellow- Interferenceoraweaksignalhasbeen

received. Violet - Interferenceoraweaksignalhasdelayed

thetriggerinstant.

5. Signal condition LED Red - Nosignal. Yellow -Weaksignal Green- Goodsignal.

6. Active system LEDs TheLEDislittoshowwhichmachineinput(Probe1orProbe2)isactive,andunlitwhenthesysteminputsareinactive.

Opticalcentreline

Mounting bracket (optional)

dimensionsmm(in)

3holesØ6.4(0.25)

25(0.98)

25(0.98) 19

(0.

75)

38(

1.50

)

45

(1.7

7)25

(0

.98)

30

(1.1

8)

3gripprotrusions

100.5(3.95)

90(3.54)

2.0

(0.0

8)

2.0(0.08)

3pairsofholesØ5.3(0.20)permitOMI-2Tmountinginalternativeorientation

45(1.77) 45°

NOTE: Maximumlengthofthespecifiedcablemustnotexceed25m(82ft).

• InstalltheOMI-2Twithcableexitingfromlowerside

forgoodcoolantrunoff.

• CableentrytotheOMI-2Tissealedwithagland.

• Cableprotectionagainstphysicaldamageshouldbe

providedbyflexibleconduit.

• Routethecableawayfrompotentialsourcesof

electromagneticinterference.

• Maintainthescreenthroughcablejoints.

Cable specification

Ø7.5mm(0.29in),13corescreenedcable,each

core18x0.1mm.

Standard cable variants

TheOMI-2Tstandardpolyurethanecablesare

8m(26ft)and15m(49ft)long.

Cable installation

3B3546

Dimensions

40(1.57)

84(3.30)

40(1.57)

40(

1.57

)

46.7(1.84)

45(

1.77

)

63(

2.48

)

16(0.63)

dimensionsmm(in)

Renishaw plc

NewMills,Wotton-under-Edge,Gloucestershire,GL128JRUnitedKingdom

T +44(0)1453524524 F +44(0)1453524901E uk@renishaw.com

www.renishaw.com

For worldwide contact details, please visit our main web site at www.renishaw.com/contact

*H-5439-8200-01*©2007Renishawplc.Allrightsreserved. Renishawreservestherighttochangespecificationswithoutnotice Issued11.07 Partno.H-5439-8200-01-A

Parts list –pleasequotethepartnumberwhenorderingequipment

Type Part no. Description

OMI-2Tkit A-5439-0049 OMI-2Twith8m(26ft)cableandtoolkit.

OMI-2Tkit A-5439-0050 OMI-2Twith15m(49ft)cableandtoolkit.

Mountingbracket A-2033-0830 MountingbracketforOMI-2T.

Conduitkit A-4113-0306 Conduitkitwith1m(3.28ft)ofpolyurethaneconduitandbulkheadconnector(M16thread).

Windowreplacementkit

A-5191-0019 Comprising:windowassemblywith‘O’ring,3xstainlesssteelM3x14mmlongscrews,3xstainlesssteelM3x5mmlongscrewsand2.5mmhexagonwrench.

Toolkit A-5191-0300 Comprising:2.5mmhexagonwrench,4mmhexagonwrench,14xferrules,2xM5screws,2xM5washersand2xM5nuts.

Publications.Thesecanbedownloadedfromourwebsiteatwww.renishaw.com

OMI-2T A-5439-8500 Installationanduser’sguideOMI-2T

OMP40-2 H-4071-8200 DatasheetOMP40-2

OMP400 H-2000-2324 DatasheetOMP400

OMP60 H-2000-2131 DatasheetOMP60

OTS H-5401-8200 DatasheetOTS

Wiring diagram (withoutputgroupings

shown)

12Vto30V

0V

Turquoise

Turquoise/black

Blue

Blue/black

Violet

Violet/black

Screen

OMI-2T

Pink

Red

Machineground(starpoint)

Powersupply(12Vdcto30Vdc)

Lowbattery(SSR)

Probestatus1(SSR)

Probestatus2(SSR)

Machinestartinput(Probe1)

Error(SSR)

White

Green

Green/black

Machinestartcommon

Machinestartinput(Probe2)

Black

Green/yellow

Brown

RENISHAWHASMADECONSIDERABLEEFFORTSTOENSURETHECONTENTOFTHISDOCUMENTISCORRECTATTHEDATEOFPUBLICATIONBUTMAKESNOWARRANTIESORREPRESENTATIONSREGARDINGTHECONTENT.RENISHAWEXCLUDESLIABILITY,HOWSOEVERARISING,FORANYINACCURACIESINTHISDOCUMENT.