Emerson Centellis 2000 Shelf Release 3.0 Manual page 170

Safety Notes
Short Circuits or Personal Injury
Ensure that the power feeds you plan to remove or attach are powered off and cannot be
switched on while you are working.
Ensure that all power input lines are not energized. Be careful with the used tools in order to
prevent a short circuit.
Product Damage
Improper cabling damages your product.
Take extreme care not to connect the power cable in reverse polarity.
AC PSUs
Personal Injury
Hot PSUs may cause injury.
Allow the PSU to cool before servicing.
DC PEMs
Personal Injury
Hot PEMs may cause injury.
Allow the PEM to cool before servicing.
System Damage
Applying feed power to the PEM with the PEM breaker in the ON position damages your system
and/or system components.
The PEM breaker must be in the OFF position when you turn on the feed power.
System Damage
Inserting or extracting the PEM with the PEM breaker in the ON position may damage your
system.
If power is connected to the shelf, make sure the PEM breaker is in the OFF position before you
insert or extract a PEM.
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Centellis 2000 Shelf Release 3.0 Installation and Use (6806800L99F)