
3–9
Chapter 3 – Installation and Wiring
GLC2400/2500/2600 Series User Manual
• 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.
•
Ground the surge absorber (E1) separately from the GLC unit (E2).
•
Select a surge absorber with a maxi-
mum circuit voltage that is greater
than that of the power supply’s peak
voltage.
Main circuit power
Main
power
GLC
power
Input/Out-
put device
Input/Out-
put device
Operation
unit
Input/Output
power
GLC unit
GLC unit
Lightning
surge
absorber