Proface GP4100 - 3.4 Compact HMIs" - Manual (Page 57)

GP-4100 Series Hardware Manual
4-12
4.2.2 Connecting the Power Supply
This section describes the precautions for supplying a power voltage.
• If the supplied voltage exceeds the GP unit’s range,
connect a constant voltage transformer.
• For between the line and ground, select a power
supply that is low in noise. If there is an excess amount
of noise, connect a insulating transformer.
• When supplying power to the GP unit, be sure to
separate the input/output and power lines, as shown.
• To increase the noise resistance quality of the power
cord, simply 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 lightening surge absorber, as shown in the
diagram, to deal with power surges.
• To avoid excess noise, make the power cord as short as
possible.
SEE Chapter 3 Specifications (page 3-1)
• Use constant voltage and
insulating transformers with
capacities exceeding Power
Consumption value.
• Be sure to ground the surge
absorber (E1) separately from the
GP unit (E2).
• Select a surge absorber that has
a maximum circuit voltage greater
than that of the peak voltage of
the power supply.
GP
GP Power
Input/Output
Power
Main Power
GP
Main Circuit
Lightening Surge
Absorber
GP
E2
FG
E1
Constant
Voltage
Transformer
Twisted-pair cord
GP
FG
I nsulating
Transformer
T2
T1
Twisted-pair cord
GP
FG
Input/Output
Unit
Main
Power
GP
Power
Input/
Output
Power
Input/Output
Unit
Input/Output
Unit
Operation
Unit