Programmable Controller User's Manual

9·20

From the previous page

Set LG (shield ground) switch

· For communication lines, use a coaxial cable.

· As coaxial cable is an unbalanced circuit,

ground its shield by turning “ON” the shield

ground switch.

•Make sure to provide a class-3 grounding for the GND terminal of the power module. Without

grounding the power module, the JW-20CM cannot become conductive with the ground after

turning “ON” the shield ground switch. (See page 7 · 2.)

• Prior to any electric welding around the JW-20CM, take out the coaxial cable from the JW-20CM.

While the coaxial cable is connected to the JW-20CM, any electric welding nearby the JW-20CM

will cause the welding current to the JW-20CM and may damage part of its circuit pattern.

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(ON)

Coaxial cable

Turn “ON” shield ground

switch

Turn “ON” shield ground

switch

Coaxial cable

JW-20CM

Turn “ON”

shield ground

Rack etc.

Electric welder

Note: In case enough

conductivity is not

established.

JW-20CM

Turn “ON”

shield ground

JW-20CM has a

fuse element here

Wraparound current