Sharp JW-20CM - Manual (Page 50)

8 · 12
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 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.
To the next page
Coaxial cable
Turn “ON” shield ground
switch Turn “ON” shield ground
switch
Turn “ON” shield
ground switch
Rack etc.
JW-20CM
JW-20CM has a fuse element here.
Electric welder
Note:
Coaxial cable
Wrap around current
Note: In case enough
conductivity is not
established.
FG
JW-20CM
Turn “ON” shield
ground switch