Multiprocess Switch K804-1 | Lincoln Electric DC-400 specification

A-4	INSTALLATION	A-4

HI-FREQUENCY KIT (K799 CODES 8634 AND ABOVE ONLY)

Kit supplies the high frequency plus gas valve for DC TIG welding. The DC-400 is shipped with proper R.F. bypass circuitry installed to protect the control circuit when welding with a HI-FREQ unit. K844 Water Valve Option Kit can be used with K799 when TIG welding with water cooled torches. See Hi-Frequency Kit Instruction Manual for installation information.

AMPTROL ADAPTER FOR K799 HI-FRE- QUENCY KIT (K915-1, REQUIRES K864 ADAPTER)

A “V” cable to connect a K799 Hi-Freq Kit (5-pin con- nector) with either a K963 Hand Amptrol or a K870 Foot Amptrol (6-pin connector) and the machine. The cable going to the machine has a 6-pin connector which requires a K864 adapter to connect with the 14- pin connector on the DC-400. Refer to S20909 instructions for connection information.

MULTIPROCESS SWITCH (K804-1)

Kit that mounts on the front of the DC-400, and includes hinged covers over its output studs. The

switch has three positions: Positive semiautomatic/automatic, negative semiautomatic /automatic, and stick/air carbon arc. Required when using the DC-400 for both semiautomatic/automatic and stick/air carbon arc.

Install per M17137 instructions included with the field installed kit.

CAPACITOR DISCHARGE CIRCUIT (K828-1)

Circuit that mounts inside the DC-400. Recommended when:

1)DC-400 is used in conjunction with any LN-23P or older LN-8 or LN-9 semiautomatic wire-feeder. Eliminates possible arc flash re-start of weld when trigger interlock is used. Not required with current LN-8 (above Code 8700), or LN-9’s with serial numbers above 115187 (manufactured after 12/83), or any LN-9 having an L6043-1 Power PC Board.

2)DC-400 is used with an LN-22 equipped with an older K279 Contactor-Voltage Control Option. Eliminates electrode overrun when gun trigger is released. Not required when later K279 (above Code 8800) is used.

3)DC-400 is used with any semiautomatic wire-feed- er and possible small spark, if electrode touches work just after gun trigger is released, is objection- able.

Install per M17060 instructions included with the Kit.

UNDERCARRIAGES (K817, K817R, K841)

For easy moving of the machine, optional undercar- riages are available with either steel (K817) or rubber tired (K817R) wheels or a platform undercarriage (K841) with mountings for two gas cylinder at rear of welder.

Install per instructions provided with undercarriage.

INSTALLATION OF EQUIPMENT REQUIRED FOR RECOMMENDED PROCESSES

WIRE FEEDER CONTROL CABLE CONNEC- TIONS

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.

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.