en/ACS800-04/U4 Hardware Manuals - VAE ProSys sro

2NEW (page 24): Type codeThe table below contains the new option code definition for the Safe torque offfunction.CodeDescription+Q967 Safe torque off (STO)CHANGED (page 25): Main circuit and control / DiagramX41 - Prevention of unexpected start (+Q950, AGPS board) or Safe torque off(+Q967, ASTO board)NEW (page 49): Emergency stopNote: If you add or modify the wiring in the drive safety circuits, ensure that theappropriate standards (e.g. IEC 61800-5-1, EN 62061, EN/ISO 13849-1 and -2) andthe ABB guidelines are met. After making the changes, verify the operation of thesafety function by testing it.NEW (page 51): Safe torque offThe drive supports the Safe torque off (STO) function according to standardsEN 61800-5-2:2007; EN/ISO 13849-1:2008, IEC 61508, and EN 62061:2005. Thefunction also corresponds to an uncontrolled stop in accordance with category 0 ofEN 60204-1 and prevention of unexpected start-up of EN 1037.The STO may be used where power removal is required to prevent an unexpectedstart. The function disables the control voltage of the power semiconductors of thedrive output stage, thus preventing the inverter from generating the voltage requiredto rotate the motor (see the diagram below). By using this function, short-timeoperations (like cleaning) and/or maintenance work on non-electrical parts of themachinery can be performed without switching off the power supply to the drive.Update Notice