40 Rockwell Automation Publication 520-TD002A-EN-E - May 2015
PowerFlex 527 AC Drive Specifications
Safe Torque-Off Function
The PowerFlex 527 Safe Torque-Off function, when used with other safety components, helps provide protection
according to EN ISO 13849 and EN62061 for safe-off and protection against restart. The PowerFlex 527 Safe Torque-Off
function is just one component in a safety control system. Components in the system must be chosen and applied
appropriately to achieve the desired level of operator safeguarding.
PowerFlex 527 Safe Torque-Off Overview
The PowerFlex 527 Safe Torque-Off function:
• Provides the Safe Torque-Off (STO) function defined in EN IEC 61800-5-2.
• Blocks gate-firing signals from reaching the Insulated Gate Bipolar Transistor (IGBT) output devices of the drive.
This prevents the IGBTs from switching in the sequence necessary to generate torque in the motor.
• Can be used in combination with other safety devices to fulfill the requirements of a system “safe torque off ”
function which satisfies Category 3 / PL (e) according to EN ISO 13849-1 and SIL CL3 according to EN/IEC
62061, IEC 61508, and EN/IEC 61800-5-2.
EC Type Examination Certification
TÜV Rheinland has certified the PowerFlex 527 Safe Torque-Off function compliant with the requirements for machines
defined in Annex I of the EC Directive 2006/42/EC, and that it complies with the requirements of the relevant standards
listed below:
• EN ISO 13849-1:2008+AC:2009 Safety of machinery – Safety related parts of control systems – Part 1: General
principles for design. (PowerFlex 527 STO achieves Category 3 / PL(e))
• EN 61800-5-2:2007 Adjustable speed electrical power drive systems – Part 5-2 Safety requirements – Functional.
(PowerFlex 527 STO achieves SIL CL 3)
• EN 62061:2005+A1:2013 Safety of machinery – Functional safety of safety-related electrical, electronic and
programmable electronic control systems.
• EN 60204-1:2006+A1:2009 – Safety of machinery – Electrical equipment of machines - Part 1: General
requirements
• IEC 61508 Part 1-7:2010 Functional safety of electrical/electronic/programmable electronic safety-related systems
– Parts 1-7.
TÜV also certifies that the PowerFlex 527 STO may be used in applications up to Category 3/ PL(e) according to EN ISO
13849-1 and SIL 3 according to EN 62061 / EN 61800-5-2 / IEC 61508.
The TÜV Rheinland certificate may be found at http://www.rockwellautomation.com/products/certification/
.
Safety Concept
The PowerFlex 527 Safe Torque-Off function is suitable for use in safety applications up to and including Category 3 /
PL(e) according to EN ISO 13849-1 and SIL 3 according to EN 62061 / EN 61800-5-2 / IEC 61508.
In addition, the PowerFlex 527 STO function may be used together with other components in a safety application to
achieve an overall Category 3 / PL(e) according to EN ISO 13849-1 and SIL 3 according to EN 62061 and IEC 61508.
Safety requirements are based on the standards current at the time of certification.
To Next Page
Loading...
Need help?
General
