A-BAdjustable Frequency AC Drive

Ungrounded Distribution Systems

ATTENTION: PowerFlex 40 drives contain protective MOVs that are 

referenced to ground. These devices must be disconnected if the drive is 

installed on an ungrounded or resistive grounded distribution system.

Disconnecting MOVs

To prevent drive damage, the MOVs connected to ground shall be 

disconnected if the drive is installed on an ungrounded distribution 

system where the line-to-ground voltages on any phase could exceed 

125% of the nominal line-to-line voltage. To disconnect these devices, 

remove the jumper shown in the Figures 1.1 and 1.2.

1. Turn the screw counterclockwise to loosen.

2. Pull the jumper completely out of the drive chassis.

3. Tighten the screw to keep it in place.

Figure 1.1 Jumper Location (Typical)

Solid state equipment has operational characteristics differing from those of 

electromechanical equipment. Safety Guidelines for the Application, Installation 

and Maintenance of Solid State Controls (Publication SGI-1.1 available from your 

local Rockwell Automation sales office or online at http://

www.rockwellautomation.com/literature) describes some important differences 

between solid state equipment and hard-wired electromechanical devices. Because 

of this difference, and also because of the wide variety of uses for solid state 

equipment, all persons responsible for applying this equipment must satisfy 

themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or 

consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative 

purposes. Because of the many variables and requirements associated with any 

particular installation, Rockwell Automation, Inc. cannot assume responsibility or 

liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of 

information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written 

permission of Rockwell Automation, Inc. is prohibited.

Throughout this manual, when necessary we use notes to make you aware of safety 

considerations

Allen-Bradley, Rockwell Automation, and PowerFlex are registered trademarks of Rockwell Automation, Inc. DriveExplorer, DriveExecutive, and SCANport are trademarks of Rockwell Automation, Inc. PLC is a registered trademark of Rockwell Automation, Inc

The information below summarizes the changes to the PowerFlex 40 User Manual since the August 2008 release.

Description of New or Updated Information Page(s)

Minimum Enclosure Volume column and new footnotes added. 1-9, A-2

Drive, Fuse & Circuit Breaker Ratings topic updated. A-1

Electronic Motor Overload Protection description updated. A-4

The information below summarizes the changes to the PowerFlex 40 

User Manual since the April 2008 release.

Manual Updates

Description of New or Updated Information Page(s)

Description of A056 revised. 3-17

Description of A059/A062 revised. 3-19

Fault description for F3 revised. 4-3

A table row for electrical specifications added. A-4

Graphic for the “Network Wiring” section revised. C-1

Second last paragraph in the “Network Wiring” section revised. C-2

Text in the “Writing (06) Logic Command Data” section revised. C-4

Frequency source for logic command 001 of bits 14, 13, and 12 corrected. C-4

Text in the “Writing (06) Reference” section revised. C-5

Parameter Updates

The following parameters have been updated with firmware version 6.xx.

Parameter Number Description Page

[Relay Out Sel] A055 Function of option 20, ParamControl, 

changed.

Option 24, MsgControl, added.

3-16

[Relay Out Sel] A058, A061 Function of option 20, ParamControl, 

changed.

Option 24, MsgControl, added.

3-18

The information below summarizes the changes to the PowerFlex 40 

User Manual since the January 2007 release.

Manual Updates

Description of New or Updated Information Page(s)

Input description and attention text for Multiple Digital Input Connection 

example corrected.

1-22

New method of changing speed reference for IP66, NEMA/UL Type 4X rated 

drives described.

2-2

Description for Up Arrow and Down Arrow keys revised. 2-4

Fault description for F3 revised. 4-3

Graphic for the “Network Wiring” section revised. C-1

Descriptions for bits 6, 7, and 15 of register address 8192 (Logic Command) 

updated.

C-4

New information on reading register address 8192 added. C-4

New information on reading register address 8193 added. C-5

Graphic for the “Connecting an RS-485 Network” section corrected. D-4

New method for inverting sign of PID error added.

New Parameter

The following parameter has been added with firmware version 5.xx.

Parameter Updates

The following parameters have been updated with firmware version 5.xx.

Description of New or Updated Information Page(s)

Input description and attention text for Multiple Digital Input Connection 

example corrected.