8 Rockwell Automation Publication 750-PM001N-EN-P - February 2017
Preface
General Precautions
Qualified Personnel
Personal Safety
ATTENTION: Only qualified personnel familiar with adjustable frequency AC
drives and associated machinery must plan or implement the installation,
startup, and subsequent maintenance of the system. Failure to comply can
result in personal injury and equipment damage.
ATTENTION: To avoid an electric shock hazard, verify that the voltage on the
bus capacitors has discharged before servicing.
Frames 1…7: Measure the DC bus voltage at the power terminal block by
measuring between the +DC and -DC terminals or between the +DC and -DC
test point sockets if equipped. Also measure between the +DC terminal or test
point and the chassis, and between the -DC terminal or testpoint and the
chassis. The voltage must be zero for all three measurements.
Frames 8…10: Measure the DC bus voltage at the DC+ and DC- TESTPOINT
sockets on the front of the power module.
See the PowerFlex 750-Series AC Drives Installation Instructions, publication
750-IN001
, for terminal and testpoint socket locations.
ATTENTION: Hazard of personal injury or equipment damage exists when
using bipolar input sources. Noise and drift in sensitive input circuits can
cause unpredictable changes in motor speed and direction. Use speed
command parameters to help reduce input source sensitivity.
ATTENTION: Risk of injury or equipment damage exists. DPIâ„¢ or SCANportâ„¢
host products must not be directly connected together via 1202 cables.
Unpredictable behavior can result if two or more devices are connected in
this manner.
ATTENTION: The drive start/stop/enable control circuitry includes Solid-
state components. An additional hardwired stop circuit can be required to
remove the AC line to the drive if either of the following hazards exist:
• Accidental contact with moving machinery
• Unintentional flow of liquid, gas, or solids
An auxiliary braking method can be required.
ATTENTION: Hazard of personal injury or equipment damage due to
unexpected machine operation exists if the drive is configured to issue a Start
or Run command automatically. Do not use these functions without
considering applicable local, national, and international codes, standards,
regulations, or industry guidelines.
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