Proface FP3900 - 19 Flat Panel" - Manual (Page 46)

FP-2500/FP-2600 Series User Manual 3-9
3.2 Wiring
3.2.3 Connecting the Power Supply
• When supplying power to the FP unit, be sure
to separate the input/output and operation unit
lines, as shown.
• To increase the noise resistance quality of the
power cable, be sure to twist each power wire
before attaching the Ring Terminal.
• The power supply cable must not be bundled or
positioned close to main circuit lines (high
voltage, high current), or input/output signal lines.
• Connect a lightning surge absorber, as shown in
the diagram, to deal with power surges.
• To avoid excess noise, make the power cable as
short as possible.
• Be sure to ground the
surge absorber (E1)
separately from the FP
unit (E2).
• Select a surge absorber
that has a maximum
circuit voltage greater
than the power supply's
peak voltage.
Input/ Out-
put Power
power
input/output
main circuit
Motor
Operation
Unit
Input/ Out-
put Power
FP unit
Main
Power
FP
power
FP unit
lightning
surge
absorber
input/out-
put unit
M a i n
Power FP
power
FP unit