Connection of DC-400 to LN-22 or LN-25

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INSTALLATION

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INSTALLATION OF EQUIPMENT REQUIRED FOR RECOMMENDED PROCESSES

WIRE FEEDER CONTROL CAbLE CONNECTIONS

For control cable with 14-pin connector:

Connect control cable to 14-pin connector on the front panel of the machine. See the appropriate connection diagram for the exact instructions for the wire feeder being used. Refer to Section 2.4.1 for connector pin functions.

For control cable with terminal strip connectors:

The control cable from the wire feeding equipment is connected to the terminal strips behind the control panel*. A strain relief box connector is provided for access into the terminal strip section. A chassis ground screw is also provided below the terminal strip

marked with the symbol for connecting the auto- matic equipment grounding wire. See the appropriate connection diagram for the exact instructions for the wire feeder being used.

Acover (Lincoln Electric Part Number S17062-3) is available for the unused 14-pin connector to protect it against dirt and moisture.

*See Terminal Strip Connections section for access to the terminal strips.

a)Turn off all power.

b)Place output terminals switch into the “ON” posi- tion.

c)Connect the electrode cable to the output terminal of polarity required by electrode. Connect the work lead to the other terminal.

d)Place the OUTPUT CONTROL Switch at “LOCAL” position unless a Remote Control is connected to the DC-400.

e)Place MODE SWITCH in “CONSTANT VOLTAGE (FCAW, GMAW)”.

NOTE: The output terminals are energized at all times.

MULTIPROCESS SWITCH CONNECTION AND OPERATION

PURPOSE

A Multiprocess Switch has been designed for use with the DC-400 or DC-600. With this switch installed on the DC-400, it permits easy changing of the polarity of the wire feed unit connected and also provides sepa- rate terminals for connection of stick or air carbon arc. The Multiprocess Switch is available as either a facto- ry installed or field installed option.

NOTE: IF THE DC-400 IS TO BE USED FOR BOTH SEMIAUTOMATIC/AUTOMATIC AND STICK/ AIR CARBON ARC, THEN A MULTI- PROCESS SWITCH IS REQUIRED.

DESIGN

The Multiprocess Switch consists of a 3-position switch assembly that is mounted in a sheet metal enclosure that has two output terminals on each end of the box. The two terminals on the left side of the box are for connection of wire feed electrode and work leads. The two terminals on the right side of the box are for connection of work and electrode for stick or air carbon arc. The output terminals are protected against accidental contact by hinged covers.

The switch mounts to the front of the DC-400 by means of a bracket that fastens to the case sides. Two 4/0 (107 mm2) leads connect the switch assem- bly to each output stud.

CONNECTIONS

1.Connect wire feed unit electrode and work cables through the rectangular strain relief holes in the base of the DC-400 to the output studs on the left side of the box.

2.Connect wire feeder control cable and make other terminal strip connections as specified on the con- nection diagram for the Lincoln wire feeder being used. “Electrode” and “Work” are connected to the left side of the Multiprocess Switch.

3.Connect stick or air carbon arc electrode and work cables through the rectangular strain relief holes in the base of the DC-400 to the output studs on the right side of the box.

OPERATION

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.