Output Connections

See Figure 2 for locations of the various case front connection points.

The DC-650 PRO output studs are mounted in pairs. The two studs in each pair are internally connected to each other with a buss bar. The studs have a 1/2-13 thread. Output cable lugs must have a hole large enough to clear a 1/2 inch stud. Choose the cable size from the table “Recommended Cable Sizes”. Lengths shown are the total cable length, work cable length plus electrode cable length.

RECOMMENDED CABLE SIZES

(RUBBER COVERED COPPER - RATED 75°C)


		Cable Sizes for Combined Length of Work and Electrode Cables

Output	Duty Cycle	0 - 100 ft	100	- 200 ft	200	- 250 ft
		(0 - 30 m)	(30 - 60 m)		(60 - 75 m)

700A	100%	2 - 2/0	2	- 3/0	2	- 4/0
		(2 - 70 mm2)	(2 - 95 mm2)		(2 - 120 mm2)

Output cable strain reliefs are built into the DC-650 PRO base. Feed the output cables up through the strain relief holes before connecting to the output studs. This will prevent damage to the studs and the cables in the event the cables are pulled or stretched.

The positive connections can be made to the pair of studs on the lower right of the case front, marked “+” (#5, Figure 2). Connection can be made to either or both of the “+” studs.

3 4 5

Figure 2

There are two pairs of studs for the negative connection. It is important to use the correct pair of studs, depending on the processes in use. NOTE:

DO NOT CONNECT BOTH PAIRS OF NEGATIVE STUDS TOGETHER. USE EITHER ONE PAIR, OR THE OTHER, BUT NEVER CONNECT BOTH PAIRS TO THE WORKPIECE AT THE SAME TIME. Doing so will adversely affect the output characteristics of the machine, giving poor welding performance.

Note that the center pair is labeled “-” and “GMAW FCAW” (#4, Figure 2). This pair is to be used for constant voltage processes requiring low output inductance, such as gas metal arc welding, and flux- cored arc welding.

The left hand pair is labeled “-” and “SAW, SMAW” (#3, Figure 2). This pair is to be used for constant current processes, such as stick welding, as well as for submerged arc welding on constant voltage.

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