Rockwell Automation Allen-Bradley PowerFlex 520 Series, User Manual, Page: 238 / 272

238 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Appendix G Safe Torque Off Function
Category 3 / PL (d) according to EN ISO 13849-1 and SIL CL2 according to
EN 62061, IEC 61508, and EN 61800-5-2.
EC Type Examination
Certification
TÜV Rheinland has certified the PowerFlex 525 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 Safety of machinery – Safety related parts of control
systems – Part 1: General principles for design.
(PowerFlex 525 STO achieves Category 3 / PL(d))
• EN 61800-5-2 Adjustable speed electrical power drive systems – Part 5-2
Safety requirements – Functional.
(PowerFlex 525 STO achieves SIL CL 2)
• EN 62061 Safety of machinery – Functional safety of safety-related
electrical, electronic and programmable electronic control systems.
• IEC 61508 Part 1-7 Functional safety of electrical/electronic/
programmable electronic safety-related systems – Parts 1-7.
TÜV also certifies that the PowerFlex 525 STO may be used in applications up
to Category 3/ PL(d) according to EN ISO 13849-1 and SIL 2 according to
EN 62061 / EN 61800-5-2 / IEC 61508.
The TÜV Rheinland certificate may be found at:
rok.auto/certifications .
EMC Instructions
PowerFlex 525 Safe-Torque-Off function requires CE Conformity as described
on
page 51 .
IMPORTANT
The function is suitable for performing mechanical work on the drive
system or affected area of a machine only. It does not provide electrical
safety.
ATTENTION: Electric Shock Hazard. Verify that all sources of AC and DC power
are de-energized and locked out or tagged out in accordance with the
requirements of ANSI/NFPA 70E, Part II.
To avoid an electric shock hazard, verify that the voltage on the bus
capacitors has discharged before performing any work on the drive.
Measure the DC bus voltage at the +DC and -DC terminals or test points
(refer to your drive’s User Manual for locations). The voltage must be zero.
In safe-off mode, hazardous voltages may still be present at the motor. To
avoid an electric shock hazard, disconnect power to the motor and verify
that the voltage is zero before performing any work on the motor.