Rockwell Automation Allen-Bradley 7712, User Manual

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Rockwell Automation Publication 7712-UM001D-EN-P - October 2017 27
Chapter
4
Equipment Operation
Power Lockout Procedure
The power lockout procedure removes all power from user-accessible areas.
Open Contactor
The contactor can operate (open or closed) only when the contactor cart is in
the operating or test position.
1. Remove the close command applied on IntelliVAC.
• If the system is running at Local mode, push the Open button on the
low voltage control panel.
• If the system is running at System mode, apply the Open command
from a higher level controller.
2. Open low voltage door to check the contactor status LED of
IntelliVAC; it must be off.
Power Down Low Voltage Section
Besides either customer supplied LV power or defaulted CPT mounted on the
contactor cart, the Low Voltage Section can also be powered by a temporary
LV test power supply.
1. Turn the selection switch to Off.
2. Unplug the temporary test power supply.
3. Disconnect any customer supplied power supply using standard
lockout/tagout procedures.
ATTENTION: Use suitable personal protective equipment (PPE) per local
codes or regulations. Failure to do so may result in severe burns, injury, or
death.
ATTENTION: Always perform the power lockout procedure before servicing
equipment. Failure to do so may result in severe burns, injury, or death.