Manual

2 PowerFlex® DC Drive - Frame B SCR Modules
What You Need to Do
To install the SCR Modules:
❐ Step 1: Remove power from the drive
❐ Step 2: Remove the power wiring
❐ Step 3: Remove the protective covers
❐ Step 4: Remove the Pulse Transformer and Switching Power Supply
boards
❐ Step 5: Remove the existing SCR Modules
❐ Step 6: Install the new SCR Modules
❐ Step 7: Install the Pulse Transformer board and Switching Power
Supply board
❐ Step 8: Replace the protective covers, power wiring 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.
L1 L2 L3
O
I