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Siemens 6SN1123-1AA00-0DA2 Configuration Manual
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905.019.3Safety of machinery – safety–related parts of controls according to EN ISO 13849–1:20089-349© Siemens AG 2012 All Rights ReservedSIMODRIVE 611 Configuration Manual (PJU) – 02/2012 EditionThe power unit controls the power feed to the individual motor windings.The gating logic on the control module clocks the 6 power transistors using aspecific pattern to generate a rotating field. An optocoupler is connected bet-ween the gating logic and each control amplifier of a power transistor to provideelectrical isolation. Power supply P5 of the optocoupler is fed via the NO contactof safety relay K1. When the Safe Torque Off function is activated, the NO con-tact of the safety relay is opened and the NC contact (= feedback contact) isclosed. The NO and NC contacts in the safety relay are positively driven. Thestate of the safety relay (NO contact) must be evaluated via the feedback signalcontact AS1/AS2.When the Safe Torque Off function is active (in the normal state without fault)the contacts of the NO contact –K1 are open and the power supply to the opto-couplers is interrupted.In order that the control module of the SIMODRIVE 611 identifies the state SafeTorque Off, and processes it in the sequence control, the logical signal level ofterminal 663 is signaled to the control module via an optocoupler. If the SafeTorque Off function is active, this input immediately generates a pulse inhibit viathe control logic.The feedback signal contact of the safety relay must be evaluated in every caseand must be used to directly control a second shut off signal path.AS1AS2966319FR+FR–P5LTSupplyOptocoupler/LWLFig. 9-10 SIMODRIVE closed–loop control STO control block diagramTable 9-2 Value integrated safety relayTerminal Designation Description Type AreaAS1 Contact 1 Relay feedback signal contact Ö 30 V DC/ max. 2 AAS2 Contact 2 Start inhibit 250 V AC/ max. 1 A663 Control input ”start inhibit” Nominal resistance of the ex-citation coil at 20 C 500 ΩE 21 ... 30 V DC, maximumswitching frequency: 6/min ope-rating cycles: min. 20000 me-chanical lifetime: 10 million ope-rating cycles9 Enable voltage FR+ (internal) V +24 V19 Reference FR– (external) V GroundB10d value of the integrated safety relay: 20,000,000 operating cycles,service life: 20 yearsFunctionControl9 Cabinet Design and EMC02.12 |
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