Vacon 20CP Installation, Technical And Maintenance Manual

Also see for 20 CP: User manual Installation, Technical and Maintenance Manual

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Vacon 20CP Installation, Technical And Maintenance Manual Manual pdf 108 page image

9vacon • 105 Safe Torque Off9.6 Commissioning9.6.1 General wiring instructionsThe wiring should be done according to the general wiring instructions for the specific product. Ashielded cable is required. In addition, the voltage drop from the supply point to the load shall notexceed 5% [EN 60204-1 part 12.5].The following table indicates examples of cables to be used.9.6.2 Checklist for commissioningFollow the checklist shown in the table below for the steps required to use the STO function.Protect the STO cabling with shielding or an enclosure to exclude external damage.Wire ferrules are highly recommended for all STO signals (inputs and feedback).STO feedback Cable sizeSTO feedback automaticallymonitored by an external safetydevice3 x (2 + 1) x 0,5 mm2(*)STO feedback ignored, simplysafety device (switch) used 2 x (2 + 1) x 0,5 mm2Table 47. Cable types required to meet the standards. (*) Additional wires are needed forrestarting the drive after each STO demand.Carry out a risk assessment of the system to ensure that the use of the STO function issafe and according to the local regulationsInclude in the assessment an examination of whether the use of external devices, suchas a mechanical brake, are required.Check if the switch (if used) has been chosen according to the required safety perfor-mance target (SIL/PL/Category) set during the risk evaluationCheck if the external device for automatic monitoring of the STO output feedback (ifused) has been chosen in accordance with the specific applicationCheck if the reset function with the STO function (if used) is edge sensitive.The shaft of a permanent magnet motor might, in an IGBT fault situation, still provideenergy before the torque production ceases. This may result in a jerk of max. 180° elec-trically. Ensure that the system is designed in such a way that this can be accepted.Check if the degree of protection of the enclosure is at least IP54.Check if the recommendations on EMC for cables have been followed.Check if the system has been designed in such a way that enabling of the drive throughSTO inputs will not lead to an unexpected start of the driveCheck if only approved units and parts have been used.Set up a routine to ensure that the functionality of the STO function is being checked atregular intervals.Table 48. Checklist for commissioning of STO.