Toshiba TNB21, Instruction Manual

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Unified Controller Vm series TC-net (TNB) Module Instruction Manual
iii
2. Safety Precautions on Maintenance and Inspection
WARNING
Mandatory
When installing or removing the
module after wiring, make sure that
the external power supply is off.
Otherwise, there will be live electric
poles on the back of the external
terminal block of the module, causing
an electric shock.
CAUTION
Prohibited
Do not drop, crush, or apply strong
shocks to the device or board.
It may cause failure.
Mandatory
Before touching the device or
board, touch a grounded metal to
discharge the static electricity of
your body.
Otherwise, it may cause malfunction or
failure due to static electricity.
Mandatory
Wipe off stain on the device,
module, or board with a soft cloth.
For severe stain, use a wet cloth wrung
tightly.
Leaving them stained may cause wrong
decision or malfunction.
Mandatory
Place a board or module removed
from the unit or base unit on a
conductive mat or conductive bag
(used for a backup board) on a
grounded table.
Otherwise, parts may be damaged
due to static electricity.
Prohibited
Do not use benzene or thinner to
remove stain on device, module, or
board.
It may cause deformation or
discoloration of the device panel,
module, or board.