12
7
Power Supply Cautions
Please pay special attention to the following instructions when connecting the
power cord terminals to the LogiTouch unit.
• If the power supply voltage exceeds the LogiTouch's specified range, connect a
voltage transformer.
• Between the line and the ground, be sure to use a low noise power supply. If
there is still an excessive amount of noise, connect a noise reducing transformer.
• Input and Output signal lines must be separated from the power control cables
for operational circuits.
• To increase the noise resistance, be sure to twist the ends of the power cord
wires before connecting it to the LogiTouch unit.
• The LogiTouch's power supply cord should not be bundled with or kept close
to main circuit lines (high voltage, high current), or input/output signal lines.
• Connect a surge absorber to handle power surges.
• To reduce noise, make the power cord as short as possible.
8
Grounding Cautions
• When attaching a wire to the LogiTouch's rear face FG terminal, (on the Power
Input Terminal Block), be sure to create an exclusive ground
*1
.
• Inside the LogiTouch unit, the SG (Signal Ground) and FG (Frame Ground)
terminals are connected to each other.
• When attaching an expansion unit to the LogiTouch, be sure to read the expan-
sion unit's Installation Guide.
• The grounding electric wire must be independent, not crossing over other wires.
• All LogiTouch Input and Output signal lines must be separated from all operat-
ing circuit (power) cables.
• If this is not possible, use a shielded cable and ground the shield.
9
Input/Output Signal Line Cautions
10
Maintenance and Periodic Inspection
When dirt collects on the surface or the frame of the display, soak a soft cloth in
water with a neutral detergent, wring the cloth tightly, and wipe the display.
• Do not use paint thinner, organic solvents, or strong acid com-
pound to clean the unit.
• Do not use hard or pointed objects to operate the touch-screen
panel, since it can damage the panel surface.
*1
Use a grounding resistance of 100
Ω
, a wire of 2mm
2
or thicker, or your country’s
applicable standard.
