Allen-Bradley PowerFlex 525 Application Technique page 10

Safety Function: Actuator Subsystems – Stop Category 1 via the PowerFlex 525 and PowerFlex 527 Drives with Safe Torque-off
This document presumes that a Stop/Start button is connected to the system PAC. It is referred to in
part of this circuit. This button is used for normal, non-safety stops and starts of the system. It is also used to start/restart
the drive after safety-related stops once the safety circuit is reset.
Figure 2 - PowerFlex 527 Circuit
24V DC
Typical Safety Input Device
Actuator
10
Logic
24V DC
0V DC
Range
Time
Rockwell Automation Publication SAFETY-AT140A-EN-P - May 2015
To PAC
Digital Common
Initiate Configured 'Normal'
Production Stop.
**100 ms OFF Delay
Start/Stop requests provided to
the drive by PAC via Ethernet.
Figure 2, but is not
0V DC - COM
PowerFlex
527
Gate control
power supply
Gate control
circuit
.