Multiprocess Switch

A-6

INSTALLATION

A-6

The operation of the switch is as follows:

A semiautomatic or automatic wire feed unit electrode and work cables are connected to the terminals on the left side of the box. Stick or air carbon arc electrode and work leads are connected to the terminals on the right side of the box. There are three positions on the switch. With the switch in the left position, the wire feed terminals are electrode negative. In the center position, the wire feeder terminals are electrode posi- tive. In both the left and center switch position, the right side stick terminals are disconnected. In the right switch position, the wire feed terminals are dis- connected from the DC-400 and the stick terminals connected. The polarity of the stick terminals is marked on the end of the box. To change polarity, the electrode and work leads must be interchanged. In the stick position, the stick terminals are energized at all times.

CONNECTIONS

(For those applications where it is not necessary to have separate work cables for stick and semiautomat- ic welding.)

If both stick and semiautomatic welding is done on the same workpiece, only one work lead is required. To do this, connect a 4/0 (107 mm2) jumper from the work terminal on the semiautomatic side to the termi- nal to be used for work on the stick side. The work lead from the semiautomatic side then serves as the work lead for both semiautomatic and stick welding.

	WORK	+		To stick
		+		electrode
				holder or
				air carbon
To semi-	ELECTRODE			arc torch
auto or	ELECTRODE
auto			User supplied
uipment			4/0 (107 mm2 )
			jumper

To change stick polarity, reverse the leads at the (+) and (-) terminals on the right side of the Multiprocess Switch.

NOTE: When a DC-400 equipped with Multiprocess Switch is mounted on an undercarriage, the undercarriage handle in the resting position can hit the case of the Multiprocess Switch. This does no harm, but if the user desires, a 1/4” or 3/8” bolt and nut may be placed in the hole in the undercarriage tow bar to limit the travel of the undercarriage handle.

STICK, TIG OR AIR/CARbON ARC *

a)Turn off all power.

b)Disconnect all wire feed unit control, electrode, and work leads.

c)Place MODE SWITCH in the “CONSTANT CUR- RENT (STICK/TIG)” for air carbon arc.

d)For stick, TIG or air carbon arc, place OUTPUT TERMINALS switch into the “ON” position. With the DC-400 connected for stick, TIG or air carbon arc welding, the output terminals will be energized at all times.

*NOTE: If stick welding, TIG welding or air carbon arc cutting is to be done on the DC-400 along with semi-automatic/automatic welding, then a K804-1 Multiprocess Switch is required. If the Multiprocess Switch is not used, then all control, electrode, and work leads to wire feed equipment must be disconnected from the DC-400 before connecting the DC-400 for stick or air carbon arc cutting.

IDEALARC® DC-400

DC-400 specifications

The Lincoln Electric DC-400 is a versatile and robust DC arc welding power source designed to meet the demands of various industrial applications. Known for its reliability and performance, the DC-400 is ideal for both professional welders and fabrication shops requiring robust equipment that can handle challenging welding tasks.

One of the main features of the DC-400 is its ability to provide a smooth, stable arc, which is essential for achieving high-quality welds. This welding machine is capable of delivering a wide amperage range, typically from 20 to 400 amperes, making it suitable for various welding processes, including MIG, TIG, and Stick welding. The unit's high output capabilities allow it to effectively weld a variety of materials, such as steel, stainless steel, and various alloys.

In terms of technology, the DC-400 integrates advanced power conversion technology that enhances energy efficiency while minimizing heat loss during operation. This not only contributes to lower operating costs but also ensures a longer service life for the machine. The DC-400 features a durable, rugged design, with a robust steel frame that can withstand the rigors of heavy industrial use while providing an IP23 rating for protection against moisture and dust.

Another notable characteristic of the DC-400 is its ease of use. The intuitive controls allow for quick adjustments to settings, enabling welders to easily adapt to different job requirements. The arc characteristics of the DC-400 can be fine-tuned to optimize performance for different welding applications, ensuring consistent results every time.

Moreover, the DC-400 is equipped with built-in safety features such as thermal overload protection, which prevents damage to the machine in case of prolonged operation under heavy loads. This feature enhances the safety of the operator and extends the life of the welding machine.

Overall, the Lincoln Electric DC-400 stands out as a reliable and efficient welding power source. Its combination of high-performance capabilities, advanced technology, and next-level usability makes it a popular choice in the industry. Whether for heavy fabrication, maintenance, or repair work, the DC-400 continues to prove itself as an indispensable tool for professional welders seeking quality and durability in their equipment.