Rockwell Automation 20D-P2-DG03 DriveGuard Safe Torque Off Option for PowerFlex 700S Phase II and 700L Drives - Manual (Page 33)

Rockwell Automation Publication 20D-UM007G-EN-P - March 2012 33
Description of Operation Chapter 3
Application Considerations
When the hazard analysis for the overall machine determines the need for
external mechanical brakes or other stopping means, the external means shall
be activated after the removal of power for Stop Category 0.
If the Safe Torque Off option sticks ON, the motor will stop on command
due to the enable input. The system cannot be reset when this fault condition
exists.
Example 3 - All Drives
Safe Torque Off Connection with Controlled Stop Action, Dual
Channel
Figure 4 - Stop Category 1 – Controlled
Circuit Status
Circuit shown with guard door closed and system ready for normal operation.
+24V DC
Common
+24V DC
GuardMaster
Trojan
Stop
Start
A1 S21 S11 S52 S12
A2 X1 X2
13 23
14 24
S33
Y2
S34
Y1 X3
37 47 57
38 48 58 X4
S22
Y39 Y40
Minotaur
MSR138DP
Gate
+24V DC
PowerFlex
700S/700L
Stop
Start
Start/Stop Common
24V DC Common
3
4
1
2
Safe Off Option
AC Line
Input Power
Common
Enable
M
Gate Control
Power Supply
Gate Control
Circuit