14 Rockwell Automation Publication 750-TG100B-EN-P - June 2019
Chapter 1 Before You Begin Tests, Maintenance, or Repairs
Product Advisories
Read the following precautions before you begin to test components, perform
maintenance, or repair the drive.
Qualified Personnel
Personal Safety
Product Safety
Class 1 Light-emitting Diode Product
ATTENTION: Only qualified personnel familiar with PowerFlex® 755T products
and associated machinery should plan or implement the installation, start-up
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, verify that the voltage on the
bus capacitors has discharged before servicing.
Frames 5 and 6: Measure the DC bus voltage at the power terminal block by
measuring between the +DC and –DC terminals. Also, measure between the +DC
terminal and the chassis, and between the –DC terminal and the chassis. The
voltage must be zero for all three measurements. See Frames 5 and 6 in the
Remove Power from the System section on page 15
for locations.
Frames 7…15: Measure the DC bus voltage by measuring between the +DC and
–DC testpoint sockets on the front of the power module. Also measure between
the +DC testpoint and chassis GND, and the –DC testpoint and chassis GND. See
Frames 7…15 in the Remove Power from the System section on page 17
for
locations.
ATTENTION: Potentially fatal voltages can result from improper usage of an
oscilloscope and other test equipment. The oscilloscope chassis can be at a
potentially fatal voltage if not properly grounded. If an oscilloscope is used to
measure high-voltage waveforms, use only a dual channel oscilloscope in the
differential mode with X 100 probes. It is recommended that the oscilloscope is
used in the A minus B Quasi-differential mode and the oscilloscope chassis is
grounded to an earth ground.
ATTENTION: This drive contains ESD (Electrostatic Discharge) sensitive parts
and assemblies. Static control precautions are required when you install, test,
service, or repair this assembly. Component damage can result if ESD control
procedures are not followed.
ATTENTION: Hazard of permanent eye damage exists when using optical
transmission equipment. This product emits intense light and invisible
radiation. Do not look into module ports or fiber-optic cable connectors.
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