Rockwell Automation AK DBU - Dynamic Braking Unit 600/690 VAC - Manual (Page 6)

P-2 Overview
• In this manual we refer to the AK Dynamic Braking Unit as DBU
and to the Adjustable Frequency AC Drive (AFD) as; drive, inverter
or PowerFlex Drive.
• The following words are used in the manual to describe an action:
Manual Conventions
Word Meaning
Can Possible, able to do something
Cannot Not possible, not able to do something
May Permitted, allowed
Must Unavoidable, you must do this
Shall Required and necessary
Should Recommended
Should Not Not Recommended
General Precautions
!
ATTENTION: This DBU contains ESD (Electrostatic Discharge)
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: An incorrectly applied or installed DBU can result in
component damage or a reduction in product life. Wiring or application
errors, such as, incorrect or inadequate AC supply, or excessive ambient
temperatures may result in malfunction of the system.
!
ATTENTION: Only qualified personnel familiar with AFD’s 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 DC bus terminals (which are connected to the DC bus
capacitors of the Inverter) has discharged before performing any work
on the DBU. Measure the DC bus voltage at the +DC and -DC terminal
of the Output Power Terminals. The voltage must be zero.
!
ATTENTION: Second source of power for cooling blower is present.
To avoid an electric shock hazard or moving blades, verify the
AC-power supply has been removed prior to performing any
maintenance or repairs.