Rockwell Automation 20P PowerFlex DC Drive - Frame A SCR Modules for Drives with Bus Bars - Manual (Page 2)

2 PowerFlex® DC Drive - Frame A SCR Modules for Drives with Bus Bars
What You Need to Do The SCR modules are located on the heat sink of the drive chassis, below all
circuit boards and components. To install the SCR modules:
❐ Step 1: Remove power from the drive
❐ Step 2: Remove the protective covers
❐ Step 3: Remove the Control EMI shield and Control board
❐ Step 4: Remove the Pulse Transformer and Switching Power Supply
boards
❐ Step 5: Remove the bus bars
❐ Step 6: Remove the existing SCR modules
❐ Step 7: Install the new SCR modules
❐ Step 8: Install the bus bars
❐ Step 9: Install the Pulse Transformer and Switching Power Supply
boards
❐ Step 10: Install the Control EMI Shield and Control board
❐ Step 11: Replace the protective covers and document the change
Step 1: Remove Power
from the Drive
1. Remove and lock-out all incoming power to the drive.
ATTENTION: Remove power before making or breaking cable
connections. When you remove or insert a cable connector with
power applied, an electrical arc may occur. An electrical arc can
cause personal injury or property damage by:
•
sending an erroneous signal to your system’s field devices,
causing unintended machine motion
•
causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create
electrical resistance.
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