General Grounding Requirements - Allen-Bradley PowerFlex 70 Installation Instructions Manual

Frame A, B, C, D Power Terminal Block, and DC Bus Test Points
-DC
L1 L2
R S
Frame E Power Terminal Block
L1 L2 L3
R S T
Terminal Description
R R (L1)
S S (L2)
T T (L3)
BR1 DC brake
BR2 DC brake
U U (T1)
V V (T2)
W W (T3)
PE PE ground
PE PE ground
-DC DC bus (–)
+DC DC bus (+)
Power Input Terminals on Frame B with Internal RFI Filter Option
-DC
L1 L2 L3
R S T

General Grounding Requirements

IMPORTANT The safety ground for the drive (PE) must be connected to system ground.
Ground impedance must conform to the requirements of national and local industrial safety regulations and/or electrical codes. Check the integrity
of all ground connections periodically.
For installations within a cabinet, one safety ground point or ground bus bar connected directly to building steel (girder, joist) can be used. All
circuits including the AC input ground conductor can be grounded independently and directly to this point/bar.
➊
L3 BR1 BR2 T1 T2 T3 PE
T +DC BRK U V W
+DC –DC BR1 BR2 T1 T2
U V
PE
M6
Notes
Three-phase AC line input power.
For single-phase input, connect to any two terminals.
DB resistor connection - Important: Do not connect both an internal and external
DB resistor simultaneously. Doing this can violate the minimum allowed DB
resistance and cause damage to the drive.
To the motor
To the motor
To the motor
–
–
➊
Test point on Frames A, B, C, and D are to the left or right of the power terminal
block. Frame E has a dedicated terminal.
–
L1 L2 L3 BR1 BR2 T1
R S T +DC BRK U
Rockwell Automation Publication 20A-IN009F-EN-P - April 2018
-DC
PE
T3
W
PE
M6
-DC
T2 T3 PE PE
V W
PowerFlex 70 Adjustable Frequency AC Drive
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