Proface LT3300 - 5.7 All-in-One HMI" - Manual (Page 6)

5
Wiring
Maintenance
Unit Disposal
General Safety Precautions
Be sure to ground the LT unit’s FG wire separately from other equipment FG lines. Also, be sure to use a
grounding resistance of 100 Ω or less and a 2mm 2
[0.0062inch
2
] or thicker wire, or your country’s
applicable standard. Otherwise, electric shock or malfunctions may result.
Be sure to use only the designated torque to tighten the LT unit’s terminal block screws. If these screws
are not tightened firmly, it may cause a short-circuit, fire or incorrect unit operation.
Be sure that metal particles and wiring debris do not fall inside the LT unit. They can cause a fire,
malfunction or incorrect unit operation.
Be sure to read the LT unit’s manual carefully before performing program changes, entering forced output,
or using the RUN, STOP, or PAUSE commands while the LT is operating. Mistakes made when using
these items can cause machine accidents or damage.
Be sure the electricity is turned OFF before attaching or detaching an I/O unit. If the electricity is ON when
an I/O unit is attached or detached, damage or malfunction to the I/O unit may occur.
When the product is disposed of, it should be disposed of in a manner appropriate to, and in accordance
with, the user country's industrial machinery disposal/recycling standards.
Do not press on the LT unit’s display with excessive force or with a hard object, since it can damage the
display. Also, do not press on the touch panel with a pointed object, such as the tip of a mechanical pencil
or a screwdriver, since doing so can damage the touch panel.
Do not install the LT where the ambient temperature exceeds the specified range. Doing so may cause a
unit malfunction.
To prevent abnormally high temperatures from occurring inside the LT, do not restrict or block the LT unit’s
rear-face ventilation slots.
Do not operate the LT in areas where large, sudden temperature changes can occur. These changes can
cause condensation to form inside the LT, possibly causing it to malfunction.
Do not allow water, liquids or metal fragments to enter inside the LT unit’s case, since they can cause
either a malfunction or an electric shock. The allowable pollution degree is 2.
Do not operate or store the LT in locations where it can be exposed to direct sunlight, high temperatures,
excessive dust, moisture or vibration.
Do not operate or store the LT where chemicals evaporate, or where chemicals are present in the air.
Corrosive chemicals: Acids, alkalines, liquids containing salt
Flammable chemicals: Organic Solvents