Allen-Bradley PowerFlex 525 Application Technique

16 Rockwell Automation Publication SAFETY-AT140A-EN-P - May 2015
Safety Function: Actuator Subsystems – Stop Category 1 via the PowerFlex 525 and PowerFlex 527 Drives with Safe Torque-off
The two PowerFlex 525 safety functions each achieve their necessary PLr.
When the PowerFlex 527 drive is used in the safety function, "Safety-related stop function initiated by a safeguard," the
SISTEMA calculation results are as follows.
As before, when the PowerFlex 527 drive is used in the safety function, "Prevention of an unexpected start-up," the
calculations are identical, because all of the same components are used.
Each PowerFlex 527 safety function achieved its PLr.

Allen-Bradley PowerFlex 525 Specifications

General

Horsepower	0.5-30 HP
kW	0.4-22 kW
Input Voltage	200-240V AC, 380-480V AC
Enclosure	IP20, NEMA/UL Type 1
Communications	EtherNet/IP
Control Methods	V/Hz, Sensorless Vector
STO	Safe Torque Off (STO)
Output Voltage	0-Input Voltage
Operating Temperature	-20°C to 50°C (-4°F to 122°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5-95% non-condensing
Dimensions	Varies by model
Weight	Varies by model