Lincoln Electric IM463-A manual 14

5.Mode Switch

This switch chooses the proper welding mode. Choose from GMAW (MIG), FCAW (flux-cored), SAW (submerged arc), or SMAW (stick). This switch electronically changes the welding characteristics depending on the mode setting.

NOTE: The welding cables must also be attached to the proper output studs for best welding performance (See “Output Connections” section).

6.Wire Feeder Voltmeter Switch

This switch changes the polarity of the wire feeder voltmeter sense lead, if the wire feeder is so equipped. Set to match the electrode polarity so that the wire feeder voltmeter can display the welding voltage. This switch has no effect on the welding output polarity of the DC-650 PRO.

7.Output Terminals Switch

This switch controls the solid-state output contactor circuitry in the DC-650 PRO. When set to the “On” position, the output studs are "hot" all of the time. When in the remote position, the contactor circuitry is controlled by the equipment connected to terminals 2 and 4, usually a wire feeder. Normally, this switch is turned “On” only when stick welding, arc gouging, or when using an arc powered wire feeder (such as an LN-25).

8.Power Switch and Pilot Light

Turns the DC-650 PRO on and off. The red pilot light illuminates when the machine is turned “On”.

9.Circuit Breakers

These circuit breakers provide overload protection for the auxiliary circuits. One 15 amp breaker is for the wire feeder 115V AC circuit (31 and 32), another 15 amp breaker is for the spare 115V AC auxiliary circuit (33 and 34). The 10 amp breaker is for the 42V AC wire feeder circuit (41 and 42).

10.Strain Reliefs

These strain reliefs are provided for control cables going to the terminal strips.

11.Terminal Strip Door

This access door provides protection for the terminal strip connections. (Lead numbers shown for this panel in Figure 3). The door can be opened by turning the fastener one-quarter turn counter-clockwise. Reverse this procedure to latch the door shut.

12.Wire Feeder Receptacle

This is the standard Lincoln, 14-pin, MS-type (amphenol) receptacle. See the DC-650 PRO wiring diagram for the pinout diagram of this receptacle.

13.Rating Plate

This plate contains important information regarding the code number, serial number, input voltages, input currents, and output ratings of the DC-650 PRO. Record the code and serial numbers in a safe place. These numbers will be required if replacement parts are needed in the future.

14.Digital Ammeter

Displays the output amperage when welding. If set to the SMAW (stick) mode, the ammeter displays the preset welding current when not welding. By using this meter, the output current can be set to a predetermined value before an arc is struck. This permits repeatability when changing and setting procedures. The output current can be preset from the Output Control or from a remote control attached to the terminal strip.

15.Digital Voltmeter

Displays the output voltage as measured on the output studs of the machine.

NOTE: Due to voltage drops in the welding cables and at cable connection points, the actual arc voltage may be lower than that displayed on the voltmeter. Use welding cables of the proper capacity and make sure all connections are tight to minimize this effect.

If set to either the GMAW, FCAW, or SAW modes, this meter can display the preset welding voltage when the secondary output contactor is open (usually when the gun trigger is released). By using this meter, the output voltage can be set to a predetermined value before an arc is struck. This permits repeatability when changing and setting procedures. The output voltage can be preset from the Output Control or from a remote control attached to the terminal strip. The only exception occurs when the DC-650 PRO is used with an LN-9 or NA-5; with those wire feeders, the preset voltage can only be read on the wire feed unit. The DC-650 PRO voltmeter will display “---” when in the LN-9/NA-5 mode. (see “Operation with LN-9 or NA-5 Wire Feeder” section).

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