Hardware Manual

Table Of Contents
230 Safe Torque off function
The function also corresponds to prevention of unexpected start-up as specified by
EN 1037:1995 + A1:2008 and uncontrolled stop (stop category 0) as specified in
EN 60204-1:2006 + AC:2010.
Compliance with the European Machinery Directive
See section Compliance with the European Machinery Directive on page 201.
Wiring
The following diagrams show examples of Safe torque off wiring for
a single drive (page 232)
multiple drives (page 233)
multiple drives when an external 24 V DC power supply is used (page 234).
For information on the specifications of the STO input, see section Control unit (ZCU-
12) connection data on page 193.
IEC 61326-3-1:2008 Electrical equipment for measurement, control and laboratory
use – EMC requirements – Part 3-1: Immunity requirements for
safety-related systems and for equipment intended to perform
safety-related functions (functional safety) – General industrial
applications
IEC 61508-1:2010 Functional safety of electrical/electronic/programmable
electronic safety-related systems – Part 1: General
requirements
IEC 61508-2:2010 Functional safety of electrical/electronic/programmable
electronic safety-related systems – Part 2: Requirements for
electrical/electronic/programmable electronic safety-related
systems
IEC 61511:2003 Functional safety – Safety instrumented systems for the
process industry sector
IEC/EN 61800-5-2:2007 Adjustable speed electrical power drive systems –
Part 5-2: Safety requirements – Functional
EN 62061:2005 + A1:2013
IEC 62061:2005 + A1:2012
Safety of machinery – Functional safety of safety-related
electrical, electronic and programmable electronic control
systems
EN ISO 13849-1:2008 +
AC:2009
Safety of machinery – Safety-related parts of control systems –
Part 1: General principles for design
EN ISO 13849-2:2012 Safety of machinery – Safety-related parts of control systems –
Part 2: Validation
Standard Name