218 Safe torque off functionThe Safe torque off function of the drive complies with these standards:The function also corresponds to Prevention of unexpected start-up as specified byEN 1037:1995 + A1:2008 and Uncontrolled stop (stop category 0) as specified inEN/IEC 60204-1. Compliance with the European Machinery DirectiveSee section EU Declaration of Conformity (Machinery Directive) on page 202.WiringThe following diagrams show examples of Safe torque off wiring for• a single drive (page 220)• multiple drives (page 221)• multiple drives when an external 24V DC power supply is used (page 222).For drives with option +L537+Q971, see ATEX-certified Safe disconnection function, Ex II(2) GD for ACS880 drives (option +Q971) application guide (3AUA0000074343 [English]and FPTC-02 ATEX-certified thermistor relay module, Ex II (2) GD (+L537+Q971) forACS880 drives user's manual (3AXD50000027782 [English])For information on the specifications of the STO input, see section Default I/O connectiondiagram on page 108 (external control unit) or 123 (internal control unit, option +P905).Standard NameEN 60204-1:2016 Safety of machinery – Electrical equipment of machines – Part 1: GeneralrequirementsIEC 61326-3-1:2008 Electrical equipment for measurement, control and laboratory use – EMCrequirements – Part 3-1: Immunity requirements for safety-relatedsystems and for equipment intended to perform safety-related functions(functional safety) – General industrial applicationsIEC 61508-1:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems – Part 1: General requirementsIEC 61508-2:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems – Part 2: Requirements forelectrical/electronic/programmable electronic safety-related systemsIEC 61511-1:2016 Functional safety – Safety instrumented systems for the process industrysectorIEC 61800-5-2:2016EN 61800-5-2:2007Adjustable speed electrical power drive systems –Part 5-2: Safety requirements – FunctionalIEC 62061:2015EN 62061:2005+AC:2010+A1:2013+A2:2015Safety of machinery – Functional safety of safety-related electrical,electronic and programmable electronic control systemsEN ISO 13849-1:2015 Safety of machinery – Safety-related parts of control systems – Part 1:General principles for designEN ISO 13849-2:2012 Safety of machinery – Safety-related parts of control systems – Part 2:Validation
