Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 443)

Component Definition and Maintenance 6-99
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
There is a separate SCB for each DCB, and they are labeled SCB-L
and SCB-M. These boards are NOT the same and therefore not
interchangeable. They are separate part numbers. The main
reasoning for the difference is that Current Feedback from the Line-
Side Current Transformers and Current Feedback from the Machine-
Side Hall Effect sensors requires different scaling resistors. These
resistors are mounted directly on the boards for drives with lower
current requirements. A drive with higher current requirements may
require an external parallel resistor connected across the CT/Hall
Effect sensor input plug connector.
There are two LEDs on the SCB labeled D2 and D3.
D2 is the ±15VDC voltage-OK signal, and D3 is the +5VDC
voltage-OK signal.
Signal Conditioning Board Replacement
To replace the Signal Conditioning Boards,
1. Ensure that all medium voltage and control voltage power to the
drive is isolated and locked out.
2. Note and Mark the location and orientation of all the ribbon
cables, plugs, and connectors into the SCB-L or SCB-M. Use
the electrical drawing as a reference.
3. Using your static strap, disconnect all of the connections.
4. Remove the SCB from the low voltage control cabinet. Verify
that the new part number matches the part number on the old
SCB. Installing the SCB-L in the place of the SCB-M (or the
opposite) can result in serious damage to the drive as the
feedback scaling will be wrong.
5. Install the new SCB in the low voltage control cabinet.
6. Reconnect all plug connections and verify the locations.
7. Apply Low Voltage power and complete a System Test and
Medium Voltage tests to ensure the new board functions
properly.