Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 12)

12 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Preface
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. Check the DC bus
voltage at the Power Terminal Block by measuring between the +DC and -DC
terminals, between the +DC terminal and the chassis, and between the -DC
terminal and the chassis. The voltage must be zero for all three measurements.
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.
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.
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.
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.