Lincoln Electric SVM 122-A service manual To NA-3 or NA-5 Input

C-8 C-8

ACCESSORIES

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5.Extend wire feeder control cable lead #21 so it can be connected directly to the work piece.

a.Make a bolted connection using AWG #14 or larger insulated wire. Tape the bolted connec- tion with insulating tape.

b.An S-16586- X remote voltage sensing work lead is available for this purpose.

c.Keep the #21 lead electrically separate from the work cable circuit and connection.

d.Tape the #21 lead to work cable for ease of use.

6.Connect NA-5 wire feeder control jumpers on Voltage Control Board. See NA-5 Operator’s Manual.

NOTE: The connection diagram shown in Figure C.5 shows the electrode connected for positive polarity. To change polarity:

a.Set the Idealarc DC-400 POWER toggle switch to the OFF (0) position.

b.Move the electrode cable to the negative (-) output terminal.

c.Move the work cable to the positive (+) output terminal.

d.Set the VOLTMETER toggle switch to negative (-).

NOTE: For proper NA-5 operation, the electrode cables must be secured under the clamp bar on the left side of the NA-5 Control Box.

7.Set the DC-400 OUTPUT CONTROL switch to the “Remote” position and the OUTPUT TERMINALS switch to the “Remote” position.

CONNECTING THE NA-3 OR NA-5 TO THE IDEALARC DC-400 (14-PIN AMPHENOL)

1.Disconnect main AC input power to the Idealarc DC-400.

2.Set the Idealarc DC-400 POWER switch to the OFF

(0) position.

3.Connect the electrode cable from the K597-XX Input Cable Assembly to the “+” terminal of the welder and to the wire feeder. Connect the work cable to the “-” terminal of the welder. Reverse this hookup for negative polarity. See Figure C.6.

NOTE: Welding cable must be sized for the cur- rent and duty cycle of the application.

4.Set the welder VOLTMETER switch to the desired polarity, either DC (-) or DC (+).

5.Set the MODE switch to a CV (constant voltage) position.

6.Set the DC-400 OUTPUT CONTROL switch to the “Remote” position and the OUTPUT TERMINALS switch to the “Remote” position.

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FIGURE C.6

IDEALARC DC-400/NA-3/NA-5 14-PIN AMPHENOL CONNECTION

TO NA-3 or NA-5 INPUT

CABLE PLUG

K597-XX INPUT CABLE ASSEMBLY

IDEALARC DC-400

LINCOLN ®

ELECTRIC