Important common bus (dc input) application notes, Auxiliary control power supply – Rockwell Automation 20D PowerFlex 700S Phase II Drive Frames 1...6 Installation Instructions User Manual
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Rockwell Automation Publication 20D-IN024C-EN-P - July 2013
PowerFlex 700S Adjustable Frequency AC Drive - Phase II Control
Important Common Bus (DC Input) Application Notes
1. If drives without internal precharge are used (Frames 5 and 6 only), then:
• precharge capability must be provided in the system to guard against
possible damage, and
• disconnect switches Must Not be used between the input of the drive
and a common DC bus without the use of an external precharge device.
2. If drives with internal precharge (Frames 1…6) are used with a disconnect
switch to the common bus, then an auxiliary contact on the disconnect
must be connected to a digital input of the drive. The corresponding input
(parameters 825…830) must be set to “Precharge Enable”. This provides
the proper precharge interlock, guarding against possible damage to the
drive when connected to a common DC bus.
Auxiliary Control Power Supply
An auxiliary power supply can be used to keep the 700S control assembly
energized when input power is de-energized. This allows the main control board,
DriveLogix controller and any feedback option cards to continue operation.
Refer to Power Terminal Block Specifications on page
for connection
information. You must set bit 17 “Aux Pwr Sply” of Par 153 [Control Options] to
enable this feature. Refer to the PowerFlex 700S Auxiliary Control Power Supply
(20-24V-AUX1), Installation Instructions, publication
re
information.