10 Rockwell Automation Publication 20P-TG002B-EN-P - February 2018
Chapter 1 Before You Begin Testing, Maintenance or Repairs
General Safety Precautions
Read the following precautions before you begin testing components,
performing maintenance or repairing the drive.
ATTENTION: Only qualified personnel familiar with DC drives and associated
machinery should plan or implement the installation, start-up and
subsequent maintenance of the system. Failure to comply may result in
personal injury and/or equipment damage.
ATTENTION: This drive contains Electrostatic Discharge (ESD) sensitive parts
and assemblies. Static control precautions are required when installing,
testing, servicing or repairing this assembly. Component damage may result if
ESD control procedures are not followed. If you are not familiar with static
control procedures, reference A-B publication 8000-4.5.2
, “Guarding Against
Electrostatic Damage” or any other applicable ESD protection handbook.
ATTENTION: Severe injury or death can result from electrical shock, burn, or
unintended actuation of controlled equipment. Hazardous voltages may exist
in the drive enclosure even with the circuit breaker in the off position.
Recommended practice is to disconnect and lock out control equipment from
power sources. If it is necessary to work in the vicinity of energized equipment,
the safety related work practices of NFPA 70E, Electrical Safety Requirements
for Employee Workplaces, must be followed. DO NOT work alone on energized
equipment.
ATTENTION: Potentially fatal voltages may result from improper usage of an
oscilloscope and other test equipment. The oscilloscope chassis may 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
be used in the A minus B Quasi-differential mode with the oscilloscope chassis
correctly grounded to an earth ground.
ATTENTION: Remove power before making or breaking cable connections.
When you remove or insert a cable connector with power applied, an electrical
arc may occur. An electrical arc can cause personal injury or property damage
by:
• sending an erroneous signal to your system’s field devices, causing
unintended machine motion
• causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on both the module and its
mating connector. Worn contacts may create electrical resistance.
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.
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