Rockwell Automation 20D-P2-DG03 DriveGuard Safe Torque Off Option for PowerFlex 700S Phase II and 700L Drives - Manual (Page 32)

32 Rockwell Automation Publication 20D-UM007G-EN-P - March 2012
Chapter 3 Description of Operation
Example 2 - PowerFlex 700S Drives, Frames 9…14 and
PowerFlex 700L Drives, Frames 3A and 3B
Safe Torque Off Connection with Coast-to-Stop Action, Dual
Channel
Figure 3 - Stop Category 0 – Coast
Circuit Status
Circuit shown with guard door closed and system ready for normal drive
operation.
Operating Principle
This is a dual channel system with monitoring of the Safe Torque Off circuit
and drive. Opening the guard door will switch the input circuits (S11-S12 &
S21-S22) to the Minotaur monitoring safety relay unit. The output circuits
(13-14 & 23-24) cause the drive Enable circuit to trip and the motor will
coast to stop. After the programmed delay, the timed output circuits (57-58)
will cause the Safe Torque Off option circuit to trip. To restart the drive, the
Minotaur safety relay must first be reset followed by a valid start command to
the drive.
+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