Rockwell Automation 20D-P2-DG03 DriveGuard Safe Torque Off Option for PowerFlex 700S Phase II and 700L Drives - Manual (Page 31)

Rockwell Automation Publication 20D-UM007G-EN-P - March 2012 31
Description of Operation Chapter 3
Connection Examples
Example 1 - PowerFlex 700S Drives, Frames 1…6
Safe Torque Off Connection with Coast-to-Stop Action, Dual
Channel
Figure 2 - 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 (S13-S14 &
S21-S22) to the Minotaur monitoring safety relay unit. The output circuits
(13-14 & 23-24) will cause the Safe Torque Off option and drive Enable
circuit to trip and the motor will coast to stop. To restart the drive, the
Minotaur safety relay must first be reset followed by a valid start command to
the drive.
Fault Detection
A single fault detected on the Minotaur safety input circuits will result in the
lock-out of the system at the next operation and will not cause loss of the
safety function.
Stop
Start
A1 S21 S13 31 13 23 X1
A2
+24V DC
Common
+24V DC
S22 S14 32 14 24 X2
Minotaur
MSR9T
GuardMaster
Trojan
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