Rockwell Automation 21G PowerFlex 750-Series AC Drives - Manual (Page 7)

Rockwell Automation Publication 750-IN001N-EN-P - April 2014 7
PowerFlex 750-Series AC Drives
Step 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 79 and Figure 80 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 83 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.