Installation Instructions
Original Instructions
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit
Catalog Numbers 20-750-DCBS1-F6L
Topic
Page
Product Advisories
1
Required Tools
2
Frame 6L DC Bus Bar Conversion Kit Contents (Cat. No. 20-750-DCBS1-F6L)
2
Frame 6L DC Bus Bar Conversion Kit Installation
2
Frame 6L Drive and Bus Supply Power Terminal Identifications
3
Additional Resources
9
Summary of Changes
This publication contains new and updated information as indicated in the following table.
Topic
Page
Frame 6L content updated.
Throughout
Product Advisories
ATTENTION: Only qualified personnel, who are trained and approved to install PowerFlex® 755T products and familiar with associated machinery,
should plan or implement the installation, startup, and subsequent maintenance of the system. Failure to comply can result in personal injury and/or
equipment damage.
ATTENTION: To avoid an electric shock hazard, ensure that all power to the drive has been removed before performing any steps of these instructions.
ATTENTION: To avoid an electric shock hazard, verify that the voltage on the bus capacitors has completely discharged before performing any work on
the drive. After removing power to the drive, wait 5 minutes for the bus capacitors to discharge. Remove the front cover of the drive. Measure the DC
bus voltage at the DC+ TESTPOINT and DC- TESTPOINT sockets on the front of the drive (see drawing on page 3). The voltage must be zero.
ATTENTION: HOT surfaces can cause severe burns. Do not touch the heatsink surface during operation of the drive. After disconnecting power allow
time for cooling.
ATTENTION: The information that is contained in this publication is merely a guide for proper installation. Rockwell Automation®, Inc. cannot assume
responsibility for the compliance or the noncompliance to any code, national, local or otherwise for the proper installation of this drive or associated
equipment. A hazard of personal injury and/or equipment damage exists if codes are ignored during installation.
ATTENTION: This product contains Electrostatic Discharge (ESD) sensitive parts and assemblies. Static control precautions are required when you
install these assemblies. Component damage can result if ESD control procedures are not followed. If you are not familiar with static control
procedures, reference any applicable ESD protection handbook.
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
Required Tools
Tool Description
Details
Flat-nose screwdriver
6.4 mm (0.25 in.)
Hexagonal socket wrench/bit
13 mm Hex socket
Torx, star, or hexalobular screwdriver/bit
#25, #30
Torque wrench
1...40 N•m (8.8…354 lb•in)
Frame 6L DC Bus Bar Conversion Kit Contents (Cat. No. 20-750-DCBS1-F6L)
The frame 6L DC bus bar conversion kit contains the following components.
DC Bus Bars
1
2
3
4
Item
Quantity
Description
1
1
Cover plate
2
4
M5 x 12 mm slotted-torx screws (for cover plate)
3
2
DC bus bar
4
4
M5 x 16 mm slotted-torx screws (for DC bus bar)
5
2
M6 x 16 mm slotted-torx screws (for DC bus bar)
5
Frame 6L DC Bus Bar Conversion Kit Installation
Follow these steps to install the frame 6L DC Bus Bar conversion kit.
WARNING: Remove power before you remove or make cable connections. When you remove or insert a cable connector with power applied, an electric arc
can occur. An electric arc can cause personal injury or property damage in theses ways:
• An electric arc can send an erroneous signal to system field devices, which can cause unintended machine motion
• An electric arc can cause an explosion in a hazardous environment
Electric arcs cause excessive wear to contacts on both the module and its mating connector. Worn contacts can create electrical resistance.
1.
2.
3.
2
Turn off and lockout all input power, including any external power sources.
Wait 15 minutes.
Measure the AC input and DC bus voltage to verify that there is no voltage present (See Frame 6L Drive and Bus Supply Power Terminal Identifications on page 3 for
terminal locations):
• Measure the AC input terminals R/L1, S/L2, and T/L3, L to L, and L to chassis GND (PE).
• Measure the DC testpoint terminals DC+ and DC–, DC+ to DC–, DC+ to chassis GND (PE), and DC– to chassis GND (PE).
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
Frame 6L Drive and Bus Supply Power Terminal Identifications
2
DC+ Testpoint
3
DC+ Testpoint
W/T3
V/T2
U/T1
R/L1
1
4
S/L2
T/L3
Item
Name
Description
1
R/L1, S/L2, T/L3(1)
AC line input power terminals
2
PE grounding bus(1)
Termination point of chassis ground
3
DC bus test point socket(2) (2 terminals; DC+, DC-)
4 mm socket for DC bus voltage measurement only
4
U/T1, V/T2, W/T3(1)
AC output motor terminals
(1)
(2)
These connections are bus bar type terminations and require the use of lug connectors.
Use to verify that DC bus capacitors are discharged before servicing the power module.
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
3
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
4.
4
Loosen the four M5 captive screws that secure the cover to the assembly and remove the cover.
M5 (Captive)
F-6.4 mm (0.25 in.)
3.6 N•m (32 lb•in)
4x
4
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
5.
Remove the four M5 x 10 mm slotted-torx screws that secure the cover to the chassis, and remove the cover.
5
M5 x 10 mm
T25 or F - 6.4 mm (0.25 in.)
3.6 N•m (32 lb•in)
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
5
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
6.
7.
Remove the two M5 x 10 mm slotted-torx screws that secure the ring lugs to the laminated bus bar and remove and discard the screws. Top cover shown removed
from the drive for clarity only.
Remove the two M6 x 12 mm slotted-torx screws from bus bars and discard the screws.
6
M5 x 10 mm
T25 or F - 6.4 mm (0.25 in.)
3.6 N•m (32 lb•in)
7
M6 x 12 mm
T30
6 N•m (53 lb•in)
6
7
8.
8
Align each DC-bus bar and secure with two M5 x 16 mm screws. Use one screw to secure a ring lug. Tighten four screws.
M5 x 16 mm
T25 or F - 6.4 mm (0.25 in.)
3.6 N•m (32 lb•in)
One ring lug on each bus bar.
6
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
9.
Align and tighten the two new M6 x 16 mm slotted-torx screws on the DC bus bar.
9
M6 x 16 mm
T30
6 N•m (53 lb•in)
10. Align and tighten the four new M5 x 12 mm slotted-torx screws on the cover plate to secure it to the chassis.
10
M5 x 12 mm
T25 or F - 6.4 mm (0.25 in.)
3.6 N•m (32 lb•in)
11. Secure the cover to the chassis as shown on page 4.
12. Connect the power cable with DC bus bars by using customer-supplied class 8.8 fasteners. Recommended as follows.
Maximum Lug Width(1)
Power Wire Size
Recommended Torque
Terminal Bolt Size
Recommended Tool
34.6 mm (1.36 in.)
Maximum 350 MCM conductors
19.8 N•m (175 lb•in)
M8 x 1.25
13 mm Hex socket
(1)
Lugs are not supplied.
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
7
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
Front View
DC+
DC-
13. Remove the HIM from the HIM cradle.
a. Press the tab to the top of HIM cradle.
b. Slide the HIM to the top of the HIM cradle.
c. Lift and pull to remove the HIM.
14. Record the change on the Field Installed Option label. Use a marker to write in the kit catalog number (20-750-DCBS1-F6L).
Nameplate 2:
Equivalent base drive catalog number and separate opƟons
See Nameplate 1 (located on side of drive)
For equivalent custom catalog number.
Including all original opƟons installed at factory
Equivalent Components
Series:
Equivalent Separate OpƟons
Factory Installed
Field Installed
HIM
DB Res.
Slot
20-750-
20-750-
4
5
6
7
8
Firmware
Serial Number:
8
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
PowerFlex 755T Frame 6L DC Bus Bar Conversion Kit Installation Instructions
Additional Resources
These documents contain additional information concerning related products from Rockwell Automation. You can view or download publications at rok.auto/literature.
Resource
Description
PowerFlex 750-Series Products with TotalFORCE® Control Installation Instructions,
publication 750-IN100
Provides the basic steps to install PowerFlex 755TL low harmonic drives, PowerFlex 755TR
regenerative drives, and PowerFlex 755TM drive systems.
PowerFlex 750-Series Products with TotalFORCE Control Technical Data, publication 750-TD100
• Provides detailed information on:
• Drive and bus supply specifications
• Option specifications
• Fuse and circuit breaker ratings
PowerFlex 750-Series Products with TotalFORCE Control Hardware Service Manual,
publication 750-TG100
• Provides detailed information on:
• Preventive maintenance
• Component testing
• Hardware replacement procedures
Industry Installation Guidelines for Pulse Width Modulated (PWM) AC Drives,
publication DRIVES-AT003
Provides basic information on enclosure systems, considerations to help protect against
environmental contaminants, and power and grounding considerations for installing Pulse
Width Modulated (PWM) AC drives.
Wiring and Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives,
publication DRIVES-IN001
Provides basic information to properly wire and ground PWM AC drives.
Product Certifications website: rok.auto/certifications
Provides declarations of conformity, certificates, and other certification details.
Rockwell Automation Knowledgebase
The Rockwell Automation Support Forum
Rockwell Automation Publication 750-IN125B-EN-P - July 2024
9
Rockwell Automation Support
Use these resources to access support information.
Technical Support Center
Find help with how-to videos, FAQs, chat, user forums, Knowledgebase, and product notification updates.
Local Technical Support Phone Numbers
Locate the telephone number for your country.
rok.auto/support
rok.auto/phonesupport
Technical Documentation Center
Quickly access and download technical specifications, installation instructions, and user manuals.
rok.auto/techdocs
Literature Library
Find installation instructions, manuals, brochures, and technical data publications.
rok.auto/literature
Product Compatibility and Download Center (PCDC)
Download firmware, associated files (such as AOP, EDS, and DTM), and access product release notes.
rok.auto/pcdc
Documentation Feedback
Your comments help us serve your documentation needs better. If you have any suggestions on how to improve our content, complete the form at rok.auto/docfeedback.
Waste Electrical and Electronic Equipment (WEEE)
At the end of life, this equipment should be collected separately from any unsorted municipal waste.
Rockwell Automation maintains current product environmental compliance information on its website at rok.auto/pec.
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Trademarks not belonging to Rockwell Automation are property of their respective companies.
Publication 750-IN125B-EN-P - July 2024 | Supersedes Publication 750-IN125A-EN-P - January 2023
Copyright © 2024 Rockwell Automation, Inc. All rights reserved. Printed in the U.S.A.
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