Machine Safety Switch: SI-LM40 Series Limit
Switch Style
SI-LM40 Series Limit Switch Style with Flexible In-Line Actuator
Printed in USA Nov 2012 P/N 50159 Rev. F
• Positive-openingsafetycontacts(IEC60947-5-1)(notdependentuponsprings)
•Standardlimitswitchdesign
•In-lineactuator;flexesinalldirections
•Metalhousing
•Spring-loadedactuatorbase
• ProtectiveEarthTerminal(IEC60947-1)onmodelswithmetalhousings
Note:
Thissymbolforapositiveopeningsafetycontact(IEC60947-5-1)isusedinthe
switchingdiagramstoidentifythepointinactuatortravelwherethenormallyclosedsafety
contactisfullyopen.
Kit Model
†
Actuator Type
†
Interlock Body
†
Contact
Configuration
(Actuator Engaged)
Contact
Configuration
(Actuator Removed)
Switching Diagrams*
SI-LM40MKVD
SI-QM-90A
Flexible,In-Line
SI-LM40KVD
withMetal
Housing 23 24
11 12
23 24
11 12
3 (0.12)
1 (0.04)*
0 (0)
7 (0.28)
38 (1.5)
mm (in)
Engaged
Disengaged
11-12
23-24
Safety
Monitor
SI-LM40MKVE
SI-LM40KVE
withMetal
Housing 21 22
11 12
21 22
11 12 3 (0.12)
0 (0)
7 (0.28)
38 (1.5)
mm (in)
Engaged
Disengaged
11-12
21-22
Safety
Safety
†Akitcontainsaninterlockandactuator.Individualinterlockbodiesoractuatorsareforreplacementpurposesonly.SeeWarningbelow.
*Pleasenotethatonly1mm(0.04inches)ofmovementwillopentheclosedcontact. Contacts: Open Closed Transition
WARNING...SpareactuatorsmustNEVERbeusedtobypassorotherwisedefeattheprotectivefunctionofasafetyswitch.Todoso
maycreateanunsafesituationwhichcouldleadtoseriousinjuryordeath.
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
2 P/N50159Rev.F
Machine Safety Switch: SI-LM40 Series Limit Switch Style
Important Information Regarding the Use of Safety Switches
IntheUnitedStates,thefunctionsthatBannersafetyswitchesareintendedtoperformareregulatedbytheOccupationalSafetyand
HealthAdministration(OSHA).WhetherornotanyparticularsafetyswitchinstallationmeetsallapplicableOSHArequirementsdependsupon
factorsthatarebeyondthecontrolofBannerEngineeringCorp.Thesefactorsincludethedetailsofhowthesafetyswitchesareapplied,
installed,wired,operated,andmaintained.
BannerEngineeringCorp.hasattemptedtoprovidecompleteapplication,installation,operation,andmaintenanceinstructions.This
informationisfoundintheinstructionmanualpackagedwitheachsafetyswitch.Inaddition,wesuggestthatanyquestionsregardingthe
useorinstallationofsafetyswitchesbedirectedtothefactoryapplicationsdepartmentatthetelephonenumbersoraddressshownbelow.
BannerEngineeringCorp.recommendsthatsafetyswitchesbeappliedaccordingtotheguidelinessetforthininternational(ISO/IEC)
standardslistedbelow.Specifically,BannerEngineeringCorp.recommendsapplicationofthesesafetyswitchesinaconfigurationwhich
meetssafetycategory4,perISO13849(EN954-1).
Inaddition,theuserofBannersafetyswitcheshastheresponsibilitytoensurethatalllocal,state,andnationallaws,rules,codes,and
regulationsrelatingtotheuseofBannersafetyswitchesinanyparticularapplicationaresatisfied.Extremecareisurgedthatalllegal
requirementshavebeenmetandthatallinstallationsandmaintenanceinstructionsarefollowed.
U.S. Regulations Applicable to Use of Banner Safety Switches
OSHACodeofFederalRegulations:Title29,Parts1900to1910
Availablefrom: SuperintendentofDocuments,GovernmentPrintingOffice
P.O.Box371954,Pittsburgh,PA15250-7954
Tel:202-512-1800
U.S. Standards Applicable to Use of Banner Safety Switches
ANSIB11 “StandardsforConstruction,Care,andUseofMachineTools”
Availablefrom: SafetyDirector
AMT—TheAssociationforManufacturingTechnology
7901WestparkDrive,McLean,VA22102
Tel:703-893-2900
Applicable European and International Standards
ISO/TR12100-1 “SafetyofMachinery—BasicConcepts,GeneralPrinciplesforDesign”
(EN292-18-2)
ISO13852(EN294) “SafetyofMachinery—SafetyDistancestoPreventDangerZonesBeingReachedbytheUpperLimbs”
ISO13853(EN811) “SafetyofMachinery—SafetyDistancestoPreventDangerZonesBeingReachedbytheLowerLimbs”
ISO13849(EN954-1) “SafetyofMachinery—SafetyRelatedPartsofControlSystems”
ISO13855(EN999) “SafetyofMachinery—ThePositioningofProtectiveEquipmentinRespecttoApproachSpeedsofPartsofthe
HumanBody”
ISO14119(EN1088) “SafetyofMachinery—InterlockingDevicesAssociatedwithGuards—PrinciplesforDesignandSelection”
IEC/EN60204-1 “SafetyofMachinery—ElectricalEquipmentofMachines”
IEC/EN60947-5-1 “LowVoltageSwitchgear—ElectromechanicalControlCircuitDevices”
 Availablefrom:GlobalEngineeringDocuments
15InvernessWayEast,Englewood,CO80112-5704
Phone:1-800-854-7179
Fax:303-397-2740
Application Assistance
Toll Free: 1-888-3-SENSOR(1-888-373-6767)
Email: sensors@bannerengineering.com
Address: 9714TenthAvenueNorth
Minneapolis,MN55441
P/N50159Rev.F 3
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
Machine Safety Switch: SI-LM40 Series Limit Switch Style
Round (5 mm) holes
for permanent
installation (2X)
Slotted holes for initial
alignment only (2X)
Remove to access
wiring chamber (2X)
Mechanical Installation
Allmountinghardwareissuppliedbytheuser.Thefastenersmustbeofsufficient
strengthtoguardagainstincidentalbreakage.Useofpermanentfastenersor
lockinghardwareisrecommendedtopreventlooseningordisplacementofthe
actuatorandswitchbody.
Note:TheslottedholesintheswitchbodymustONLYbeusedforalignment
duringinstallation(seeFigure1).Theround5mmholes(only)mustbeusedfor
permanentmountingtopreventlooseningordisplacementoftheactuatorandthe
switchbody.OnlyM5(#10)screws(customersupplied),shouldbeused.
Therearefourholesonamountingpatternof30x60mm.Theactuatorhasfour
M4tappedmountingholesona26mm(1.02")squarepattern(seedimensionson
page7).
Positiontheswitch,withitsactuatorfullyengaged,inthemountinglocationand
markthemountingholes.Drilltherequiredholesandfastentheswitchbodyand
theactuatorinplace.Afterthemountinghardwareissecure,checktheactuator/
switchengagementformisalignmentandbinding.
Theactuatorisspring-loadedtoallowpositivepressuretobeappliedwhenthe
guardisclosed.However,theswitchmustneverserveasthemechanicalendstop
foraguarddoororgate.Positivepressurefortheactuatorengagementisdesirable,
becauseonly1mm(0.04")ofactuatortravelfromthepointoffullengagementis
requiredtoopenthesafetycontact.
Important:
1. Asafetyswitchmustbeinstalledinamannerwhichdiscourages
tamperingordefeat.Mounteachswitchtopreventbypassingofthe
switchingfunctionattheterminalchamber.
2. Aswitchanditsactuatormustneverbeusedasamechanicalstop.
3. Ensureproperplacementofgasketwhenrotatinghead.Failuretodoso
willreducetheenvironmentalrating.
WARNING ... Itmustnotbepossible
forpersonneltoreachanyhazard
pointthroughanopenedguard(or
anyopening)beforehazardousmachinemotionhas
completelystopped.PleasereferenceOSHACFR
1910.217andANSIB11standards(seepage2)for
informationondeterminingsafetydistancesandsafe
openingsizesforyourguardingdevices.
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
4 P/N50159Rev.F
Machine Safety Switch: SI-LM40 Series Limit Switch Style
Electrical Installation
Access to the Wiring Chamber
Thewiringchamberisaccessedviaacoverplate.Themetalswitchbodyusestwo
screwstoholdthecoverplateon.AconduitadapterissuppliedtoconverttheM20x
1.5threadto½"-14NPT.AnaccessorycableglandwhichfitstheM20x1.5threadis
available(seepage7).
Connection to the Machine
Twocontactsareoffered.Thecontactbetweenterminals11and12or21and22isthe
safetycontact,whichisclosed(i.e.,itconducts)whentheactuatorisengaged.The
normallyopencontactlocatedbetweenterminals23and24isconsideredamonitoring
contact,whichshouldnotbeusedforsafetyswitching.
AsillustratedinFigure2,anormallyclosedsafetycontact(i.e.,asafetycontactthatis
closedwhentheactuatorisengaged)fromeach of two safety switches per interlock
guardmustconnecttoa2-channelsafetymoduleorsafetyinterfaceinordertoachieve
acontrolreliableinterfacetothemasterstopcontrolelementsofamachine.Examplesof
appropriatesafetymodulesinclude2-channelemergencystop(E-stop)safetymodules
andgatemonitorsafetymodules.
Twofunctionsofthesafetymoduleorsafetyinterfaceare:
1. toprovideameansofmonitoringthecontactsofbothsafetyswitchesfor
contactfailure,andtopreventthemachinefromrestartingifeitherswitchfails;
and
2. toprovidearesetroutineafterclosingtheguardandreturningthesafetyswitch
contactstotheirclosedposition.Thispreventsthecontrolledmachineryfrom
restartingbysimplyreinsertingthesafetyswitchactuators.Thisnecessary
resetfunctionisrequiredbyANSIB11andNFPA79machinesafetystandards.
Useonlyapositivelydriven,normallyclosedsafetycontactfromeachswitchfor
connectiontothesafetymodule.The normally open contact may be used for control
functions that are not safety-related.Atypicaluseistocommunicatewithaprocess
controller.Refertotheinstallationinstructionsprovidedwiththesafetymodulesformore
informationregardingtheinterfaceofthesafetymoduletothemachinestopcontrol
elements.
CAUTION . . . Electrical
Installation
Two safety switches must be
used for each interlock guard to achieve control
reliability or Safety Category 4 (per ISO 13849-
1, EN 954-1) of a machine stop circuit. Use of
only one safety switch per interlock guard is not
recommended.
Inaddition,normally-closedsafetycontacts
fromeachofthetwosafetyswitchesshouldbe
connectedtothetwoseparateinputsofa2-channel
safetymoduleorsafetyinterface,asillustratedin
Figure6.Thisisrequiredtoprovidemonitoringfor
safetyswitchcontactfailure,andtoprovidethe
necessaryresetroutine,asrequiredbyIEC60204-
1andNFPA79machinesafetystandards.
WARNING . . . Series Connection
of Safety Interlock Switches
Monitoringmultipleguardswith
aseriesconnectionofmultiple
safetyinterlockswitchesisnotaSafetyCategory4
Application(perISO13849-1,EN954-1).
Asinglefailuremaybemaskedornotdetectedat
all.Whensuchaconfigurationisused,procedures
mustbeperformedregularlytoverifyproper
operationofeachswitch.
Figure 2. Connect two redundant safety switches per interlock guard to an appropriate
2-channel input safety module.
Safety
Switch
#1
Safety
Switch
#2
Input
Channel
#1
Input
Channel
#2
2-channel Safety Module
(2-channel E-stop Module
2-channel Gate Monitor Module, etc.)
Single gate
or guard
11 12 11 12
NOTE: Refer to the installation instructions
provided with the safety module for information
regarding the interface of the safety module to
the machine stop control elements.
P/N50159Rev.F 5
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
Machine Safety Switch: SI-LM40 Series Limit Switch Style
Periodic Checks
Safetyswitchesshouldbecheckedateachshiftchangeormachinesetupbya
designated person (seebelow)for:
1.Breakageoftheswitchbodyoractuator,
2.Goodalignmentandfullengagementoftheactuatorwiththereceptor,
3.Confirmationthatthesafetyswitchisnotbeingusedasanendstop,
4.Looseningoftheswitchoractuatormountinghardware,and
5.Verificationthatitisnotpossibletoreachanyhazardpointthroughanopenedguard
(oranyopening)beforehazardousmachinemotionhascompletelystopped.
Inaddition,aqualified personshouldcheckforthefollowingonaperiodicschedule,
determinedbytheuser,basedupontheseverityoftheoperatingenvironmentandthe
frequencyofswitchactuations:
1.Checkthewiringchamberforsignsofcontamination.
2.Checkthecontactsforsignsofdeteriorationordamage.
3.Inspecttheelectricalwiringforcontinuityanddamage.
4.Verifythatwiringconformstotheinstructionsonpage4ofthisdatasheet.
Adesignated personisidentifiedinwritingbytheemployerasbeingappropriatelytrained
toperformaspecifiedcheckoutprocedure.Aqualified personpossessesarecognized
degreeorcertificateorhasextensiveknowledge,training,andexperiencetobeableto
solveproblemsrelatingtothesafetyswitchinstallation(ANSIB30.2).
Repairs
Do not attempt any repairs to the switch. It contains no field-replaceable components.
Return the switch to the factory for warranty repair or replacement.
Ifiteverbecomesnecessarytoreturnaswitchtothefactory,pleasedothefollowing:
1.ContacttheBannerapplicationsengineeringdepartmentatthenumberoraddresslisted
onthebackcover.Theywillattempttotroubleshootthesystemfromyourdescription
oftheproblem.Iftheyconcludethatacomponentisdefective,theywillissueanRMA
(ReturnMerchandiseAuthorization)numberforyourpaperwork,andgiveyouthe
propershippingaddress.
2.Packtheswitchcarefully.Damagewhichoccursinshippingisnotcoveredbywarranty.
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
6 P/N50159Rev.F
Machine Safety Switch: SI-LM40 Series Limit Switch Style
Specifications
Contact Rating 10A@24Vac,10A@110Vac,6A@230Vac
6A@24Vdc
2.5kVmax.transienttolerance
NEMAA300P300
European Rating Use categories:AC15andDC13(IEC60947-5-1)
Ui =500Vac
Ith =10A
40–60Hz
Ue
V
I
e
/AC-15
A
I
e
/DC-13
A
24 10 6
110 10 1
230 60.4
Contact Material Silver-nickelalloy
Maximum Switching Speed 10operationsperminute
Maximum Actuator Speed 0.5m/second(20inches/second)
Minimum Actuator
Engagement Radius
150mm(6inches)
Actuator Extraction Force 20N(4.4lbf)
Short Circuit Protection 6ampSlowBlow,10ampFastBlow.Recommendedexternalfusingoroverloadprotection.
Mechanical Life 25,000operations
Wire Connections Screwterminalswithpressureplatesacceptthefollowingwiresizes–
Stranded and solid:20AWG(0.5mm
2
)to16AWG(1.5mm
2
)foronewire
Stranded:20AWG(0.5mm
2
)to18AWG(1.0mm
2
)fortwowires
Cable Entry M20x1.5threadedentrance.AdaptersuppliedtoconvertM20x1.5to½"–14NPTthreadedentrance
Construction Aluminumalloydie-casthousing
Environmental Rating IECIP65
Operating Conditions Temperature:−30°to+80°C(−22°to+176°F)
Weight 0.31kg(0.68lb)
Certifications
P/N50159Rev.F 7
Banner Engineering Corp. • Minneapolis, MN U.S.A
www.bannerengineering.com • Tel: 763.544.3164
Machine Safety Switch: SI-LM40 Series Limit Switch Style
Dimensions
64.0 mm
(2.52")
18.0 mm
(0.71")
4.0 mm
(0.16")
35.0 mm
(1.38")
26.0 mm
(1.02")
35.0 mm
(1.38") 26.0 mm
(1.02")
25.0 mm
(0.98")
56.0 mm
(2.20")
10.0 mm
(0.39")
M4
18.0 mm
(0.71")
53.0 mm
(2.09")
56.5 mm
(2.22")
2.0 mm
(0.08")
40.0 mm
(1.57")
Ø5.2 mm
(Ø0.20")
77.5 mm
(3.05")
30.0 mm
(1.18")
M20x1.5
60.0 mm
(2.36")
17.5 mm
(0.69")
7.5 mm
(0.30")
16.0 mm
(0.63")
17.5 mm
(0.69")
42.0 mm
(1.65")
33.0 mm
(1.30")
M20x1.5
16.0 mm
(0.63")
Accessories
Cable Glands
Size Model Used with
Switch Models
For Cable
Diameters Dimensions
M20x1.5Metal SI-QM-CGM20 All 5.0to12.0mm
(0.20"to0.47") M20 x 1.5
24.0 mm
(0.94")
35.5 mm
(1.40")
Replacement Parts
Description Model* Used with
Switch Models
Thread
Conversion Dimensions
½"-14NPTMetal
ConduitAdaptor SI-QM-M20 All M20x1.5to
½"-14NPT
23.0 mm
(0.91")
M20 x 1.5
24.0 mm
(0.94")
1/2"-14 NPT
Internal Thread
O-ring
*NOTE:Oneconduitadapterissuppliedwitheachswitch.
Banner Engineering Corp., 9714 Tenth Ave. No., Minneapolis, MN USA 55441 • Phone: 763.544.3164 • www.bannerengineering.com • Email: sensors@bannerengineering.com
Machine Safety Switch: SI-LM40 Series Limit Switch Style
P/N 50159 Rev. F
Banner Engineering Corp. warrants its products to be free from defects in material and workmanship for one year following the date of shipment. Banner Engineering Corp. will
repair or replace, free of charge, any product of its manufacture which, at the time it is returned to the factory, is found to have been defective during the warranty period. This
warranty does not cover damage or liability for misuse, abuse, or the improper application of the Banner product.
THIS LIMITED WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES WHETHER EXPRESS OR IMPLIED (INCLUDING, WITHOUT LIMITATION, ANY WARRANTY
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE), AND WHETHER ARISING UNDER COURSE OF PERFORMANCE, COURSE OF DEALING OR TRADE USAGE.
This Warranty is exclusive and limited to repair or, at the discretion of Banner Engineering Corp., replacement. IN NO EVENT SHALL BANNER ENGINEERING CORP. BE LIABLE
TO BUYER OR ANY OTHER PERSON OR ENTITY FOR ANY EXTRA COSTS, EXPENSES, LOSSES, LOSS OF PROFITS, OR ANY INCIDENTAL, CONSEQUENTIAL OR SPECIAL
DAMAGES RESULTING FROM ANY PRODUCT DEFECT OR FROM THE USE OR INABILITY TO USE THE PRODUCT, WHETHER ARISING IN CONTRACT OR WARRANTY, STATUTE,
TORT, STRICT LIABILITY, NEGLIGENCE, OR OTHERWISE.
Banner Engineering Corp. reserves the right to change, modify or improve the design of the product without assuming any obligations or liabilities relating to any product previously
manufactured by Banner Engineering Corp.