From the previous page

L T

(ON)

 

 

 

 

Set LG (shield ground) switch

 

L G

 

 

 

(ON)

 

 

 

 

·For communication lines, use a coaxial cable.

·As coaxial cable is an unbalanced circuit, ground its shield by turning “ON” the shield ground switch.

Turn “ON” shield ground

Coaxial cable

Turn “ON” shield ground

switch

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.

JW-20CM

JW-20CM

 

Coaxial cable

9

 

JW-20CM has a

 

Wraparound current

 

fuse element here

 

 

Turn “ON”

 

Turn “ON”

shield ground

 

shield ground

FG

 

FG

 

 

Rack etc.

Note: In case enough conductivity is not established.

Electric welder

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9·20