GB - 21
Safety Function STO
ThisbehaviourcanoccureitherbyashortcircuitoftheIGBTsorbyinterconnection(also
shortcircuit)ofthecontroldrivers.Theerrorshouldberegardedascritical,ifthedrivere-
mainsinSTOstatus.
3.2 ClassicationofSTOaccordingIEC61508
PFH 2.6 • 10
-12
1/h
PFD 2.3 • 10
-7
on demand
Proof-Test-Interval T 20 years
ForSILclassicationinconnectionwiththeapplicationsconsiderthefailureratesoftheex-
ternalswitchdevicesfornalevaluation.
3.3 ClassicationofSTOaccordingENISO13849
Category 4
MTTF
D
>1000years
DC high
Fortheclassicationwithinaperformancelevelinconnectionwiththeapplicationsconsider
thefailureratesoftheexternalswitchdevicesfornalevaluation.
3.4 Additional instructions
• The unit must be isolated from mains by main switch when working on parts under volt-
age.
• Mechanical brakes must be installed additionally if external forces have effect to the drive
axis,e.g.verticalaxes(hangingloads)orrotaryaxeswithasymmetricalweightdistribu-
tion.
• Fortheprotectionagainstpollution(pollutiondegree2)theinstallationoftheunitsmust
beprovidedinenvironmentwithincreasedprotection(e.g.controlcabinetIP54).
• MakesurethatnosmallpartsfallintotheCOMBIVERTduringassemblyandwiring.This
also applies to mechanical components, which can lose small parts during operation.
• Check the safety functions and error responses and generate an acceptance report after
installation.
• The start-up can be prevented with interruption of the STO signals. STO may not be
released in case of danger according to EN 60204-1. Also note the instructions to the
external safety switch devices.
• Dimension the safety application by way that the corresponding input current of the safety
functionsisavailablefortheinputs(seechapter2.5.1).
Selection of
suitable volt-
age sources
Use for the connection only suitable voltage sources with safe
isolation(SELV/PELV)inaccordancewithVDE0100withnom-
inalvoltageof24Vdc±10%.Payattentiononasufcientover-
voltage category of the voltage supply.
To Next Page
Loading...
Need help?
General
