Sharp JW-21MN manual 11-4, Shield ground switch LG

(5)Shield ground switch (LG)

For communication lines, use a coaxial cable.

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

	Coaxial cable		3456
			2
			01	7
			DCB
			F	8
			E	9
Turn "ON" shield ground		Turn "ON" shield ground		A
switch		switch

Setting Condition of the JW-21MN

ON

Conductive between the shield and FG

of the JW20/JW20H/JW30H

Not conductive between the shield and

ON (Rear side)

OFF

FG of the JW20/JW20H/JW30H

OFF LG

(Factory setting: ON)

11

Remarks

-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-21MN 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-21MN, take out the coaxial cable from the JW-21MN While the coaxial cable is connected to the JW-21MN, any electric welding nearby the JW-21MN will cause the welding current to the JW-21MN and may damage part of its circuit pattern.

JW-21MN Coaxial cable JW-21MN

Turn "ON" shield	Wrap around current	Turn "ON" shield
ground switch	Note:	ground switch
FG
		Rack etc.

Note: In case enough conductivity is not

Electric welder

established.

11-4