YASKAWA A1000 Quick Start Manual

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Contents

8 Safe Disable Input FunctionYASKAWA ELECTRIC TOEP C710616 27D YASKAWA AC Drive - A1000 Quick Start Guide 358 Safe Disable Input Function Specifications PrecautionsDANGER! Improper use of the Safe Disable function can result in serious injury or even death.Make sure the whole system or machinery that the Safe Disable function is used in complies with safety requirements. Whenimplementing the Safe Disable function into the safety system of a machine, a thorough risk assessment for the whole system has tobe carried out to assure it complies with relevant safety norms (e.g., EN954/ISO13849, IEC61508, EN/IEC62061,...).DANGER! When using a PM motor, even if the drive output is shut off by the Safe Disable function, a break down of two outputtransistors can cause current to flow through the motor winding, resulting in a rotor movement for a maximum angle of 180 degree(electrically). Make sure such a situation would have no effect on the safety of the application when using the Safe Disable function.This is not a concern with induction motors.DANGER! The Safe Disable function can switch off the drive output, but does not cut the drive power supply and cannot electricallyisolate the drive output from the input. Always shut off the drive power supply when performing maintenance or installations on thedrive input side as well as the drive output side.DANGER! When using the Safe Disable inputs, make sure to remove the wire links between terminals H1, H2, and HC that wereinstalled prior to shipment. Failing to do so will keep the Safe Disable circuit from operating properly and can cause injury or evendeath.DANGER! All safety features (including Safe Disable) should be inspected daily and periodically. If the system is not operatingnormally, there is a risk of serious personal injury.DANGER! Only a qualified technician with a thorough understanding of the drive, the instruction manual, and safety standards shouldbe permitted to wire, inspect, and maintain the Safe Disable input.NOTICE: From the moment terminal inputs H1 and H2 have opened, it takes up to 1 ms for drive output to shut off completely. Thesequence set up to trigger terminals H1 and H2 should make sure that both terminals remain open for at least 1 ms in order to properlyinterrupt drive output.NOTICE: The Safe Disable Monitor (output terminals DM+ and DM-) should not be used for any other purpose than to monitor theSafe Disable status or to discover a malfunction in the Safe Disable inputs. The monitor output is not considered a safe output.NOTICE: When utilizing the Safe Disable function, use only the EMC filters recommended in EMC Filter Installation on page 14. Using the Safe Disable FunctionThe Safe Disable inputs provide a stop function in compliance with “Safe Torque Off” as defined in the IEC61800-5-2.Safe Disable inputs have been designed to meet the requirements of the ISO13849-1, Category 3 PLd, and IEC61508,SIL2.A Safe Disable Status Monitor for error detection in the safety circuit is also provided. Safe Disable CircuitThe Safe Disable circuit consists of two independent input channels that can block the output transistors. In addition, itprovides a monitoring channel that indicates the status of those two input channels.The input can either use the drive internal power supply or an external power supply. Use jumper S3 on the terminalboard to select between Sink or Source mode with either internal or external power supply.A single photocoupler output is available to monitor the status of the Safe Disable terminals. Refer to Control CircuitTerminal Functions on page 17 for signal specifications when using this output.Inputs / Outputs Two Safe Disable inputs and one EDM output according to ISO13849-1 Cat. 3 PLd,IEC61508 SIL2.Operation Time Time from input open to drive output stop is less than 1 ms.Failure ProbabilityDemand Rate Low PFD = 5.15E -5Demand Rate High orContinuous PFH = 1.2E -9Performance Level The Safe Disable feature satisfies all requirements of performance level d (PLd) as definedby ISO13849-1 (this includes DC from EDM).