Allen-Bradley PowerFlex 20-750-20COMM, Installation Instructions Manual

Page: 11 / 302

Rockwell Automation Publication 750-IN001O-EN-P - October 2014 11
Chapter
1
Read the General Precautions
Qualified Personnel
Personal Safety
ATTENTION: Only qualified personnel familiar with adjustable frequency AC
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: To avoid an electric shock hazard, verify that the voltage on the
bus capacitors has discharged completely before servicing.
Frames 1…7: Measure the DC bus voltage at the power terminal block by
measuring between the +DC and -DC terminals (see Figure 88 and Figure 89 for
location) 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 Figure 92 for location).
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. DPI or SCANport 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. If hazards due to accidental contact with moving machinery or
unintentional flow of liquid, gas or solids exists, an additional hardwired stop
circuit may be required to remove the AC line to the drive. An auxiliary braking
method may be required.
ATTENTION: Hazard of personal injury or equipment damage due to
unexpected machine operation exists if the drive is configured to automatically
issue a Start or Run command. Do not use these functions without considering
applicable local, national and international codes, standards, regulations or
industry guidelines.