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 supply module. Without grounding the power supply 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.

8

 

JW-20CM

Coaxial cable

JW-20CM

 

 

 

 

 

 

 

 

 

 

 

JW-20CM has a fuse element here.

Turn “ON” shield

 

Wrap around current

Turn “ON” shield

ground switch

 

Note:

ground switch

 

FG

 

 

 

 

 

 

 

Rack etc.

Note: In case enough conductivity is not established.

Electric welder

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8·12