Safety Precautions - Omron NT30C-ST141-E Operation Manual

Safety Precautions

3 Safety Precautions
WARNING
!
! Caution
Read these safety precautions carefully and make sure you understand them
before using the Programmable Terminal so that you can use it safely and cor-
rectly.
S Never attempt repairs, modification or disassembly. You could sustain an elec-
tric shock.
S Switch OFF the PT power before changing the backlight. You could sustain an
electric shock if you attempt to change the backlight while power is being sup-
plied.
S When disposing of a used backlight, comply with all local restrictions that apply
to its disposal.
S When replacing the battery, do not allow the battery terminals to touch the
board in the PT.
S If not backed up by the built-in battery, the memory switch settings will be initial-
ized to the values set with the NT-series Support Tool when the power is turned
OFF. If a message indicating that the battery is low is displayed while the PT is
being used, replace the built-in battery immediately. For details on how to re-
place the battery, refer to Replacing the Battery (page 253).
S Switch OFF the power supply to both the PT and the B7A Interface Unit before
installing the B7A Interface Unit, otherwise the PT or the B7A Interface Unit
may be damaged.
S Switch OFF the power supply to both the PT and the B7A Interface Unit before
changing DIP switch settings.
S Do not use input functions, such as PT touch switches, for applications where
danger to human life or serious property damage is possible or for emergency
switch applications.
S Do not use the expanded I/O functions of the B7A Unit for applications where
danger to human life or serious property damage is possible or for emergency
switch applications.
S On unpacking the PT, check its external appearance and confirm that there is
no damage. Also confirm that there is no abnormal noise on shaking the PT
lightly. The PT may malfunction if it is damaged.
S During work at the panel, be sure that no metal scraps enter the PT. Otherwise,
the PT may malfunction.
S The thickness of applicable operation panel is 1.6 mm to 4.8 mm. All fittings
must be tightened uniformly to a torque of 0.5 to 0.6 N⋅m in order to ensure
water- and dust- resistance. The panel must not be soiled or warped, and must
be able to support an installation that will remain secure and strong.
S Carefully check wiring before switching ON the power.
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