28 Rockwell Automation Publication 20P-TD001K-EN-P - January 2021
PowerFlex DC Drive and Field Controller Technical Data
PowerFlex DC Drive Power Wiring Diagram Footnotes
1. For frame B and C drives only, a jumper is required between terminals SA and SB for 115V AC control input power. See PowerFlex DC
Drives and Field Controller Control Circuit Input Power on page 36 for more information.
2. An isolation transformer and/or 3…5% impedance line reactor is required. If the isolation transformer provides the required 3…5%
impedance, a line reactor is not required. For recommendations, see Isolation Transformers
on page 12 and AC Input Line Reactors
and Contactors on page 14. We recommend that the isolation transformer has a grounded wye secondary neutral. If the PowerFlex DC
drive is installed in a system with an impedance ground connection, see Grounding for Installations in Neutral Ground or High
Impedance System in the PowerFlex Digital DC Drive User Manual, publication 20P-UM001
, for more information.
3. AC input fuses for the armature converter are not provided for frame A and B drives (the customer must purchase). AC input fuses for
the armature converter are internally mounted on frame C and D drives. For fuse recommendations, see PowerFlex DC Drives and
Field Controller Circuit Protection on page 48.
4. Par 140 [Digital In8 Sel] set to 31 ‘Contactor.’
5. If the +24V internal power supply is used, terminal 18 (24V common) must be jumpered to terminal 35 (digital input common).
6. For four quadrant frame A and B drives, armature output fuses are required (the customer must purchase). For two quadrant frame A
and B drives, armature output fuses are recommended (the customer must purchase). For fuse recommendations, see PowerFlex DC
Drives and Field Controller Circuit Protection on page 48.
7. When you use an AC input contactor, armature voltage feedback is not required.
8. The ‘Enable’ input must be removed to perform a dynamic braking stop.
9. Par 1391 [ContactorControl] = 1 ‘AC Cntctr’ and Par 1392 [Relay Out 1 Sel] = 25 ‘Contactor.’ Important: Terminals 35 and 36 are on the
Control Power / Relay Outputs Terminal block, NOT the I/O terminal blocks. See Frames A and B Contact Relay and Thermistor Terminal
Block Locations on page 41, and Frame D Contact Relay and Thermistor Terminal Block Locations (only for PowerFlex DC Drives) on
page 42.
10. Frame C and D drives require only an external power supply for the heat sink cooling fans. For more information, see Frame C Heat
Sink Cooling Fan Specifications on page 38 and Frame D, Series B and C Heat Sink Cooling Fan Specifications on page 39.
11. See PowerFlex DC Drive Field Converter Connections
on page 34.
12. If sourced from the main three-phase AC input, the connections must be taken from the primary side of the Isolation Transformer or
Line Reactor (clean power).
13. Fuses or a circuit breaker. For more information, see Frame C Heat Sink Cooling Fan Specifications
on page 38 and Frame D, Series B
and C Heat Sink Cooling Fan Specifications on page 39.
14. For frames B, C, and D drives, a pilot relay is required for the contactor coil.
Armature Power Terminal Connections
Terminals Description
U, V, W Three-phase AC input to the armature converter
C, D DC output to the motor armature
PE Safety ground
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