Sharp JW-21MN manual 57

(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.

Turn "ON" shield ground	Coaxial cable
	Turn "ON" shield ground
switch	switch

3456
2	7
01	8
F
E	9
	A
DCB

Setting	Condition of the JW-21MN
ON	Conductive between the shield and FG
	of the JW20/JW20H/JW30H
OFF	Not conductive between the shield and	ON	(Rear side)
	FG of the JW20/JW20H/JW30H	OFF	LG

(Factory setting: ON)

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

11	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