Explanation of Controls

Connection of a K775 Remote Output Control

Feed the remote control cable through the box connector on the case front, to provide a strain relief for the cable. Connect the numbered leads in the control cable to the like numbered terminals on the right hand terminal strip (75 to 75, 76 to 76, and 77 to

77). Connect the green ground lead to the stud

marked .

Connection to Auxiliary Power

The DC-650 PRO has an extra 15 amps of 115 amp VAC auxiliary power, above what is required for wire feed equipment. This auxiliary supply is available on terminals 33 and 34 on the terminal strip. This supply is protected by a 15 amp circuit breaker.

Figure 4

Refer to Figure 3 for placement of the DC-650 PRO controls.

1.Output Control Potentiometer

Controls the output of the machine. Adjusts current when welding in the SMAW mode, and adjusts voltage when welding in the GMAW, FCAW and SAW modes. The Output Control switch must be in the Local position for this control to be active.

2.Output Control Switch

This switch chooses whether the DC-650 PRO output is adjusted from the front panel or by remote control. In the Local position, the Output Control Potentiometer adjusts the output. In the Remote position, the output is adjusted by either a wire feeder or an optional remote control. If using an LN-9 or NA-5 see “Operating with LN-9 or NA-5 Wire Feeder” section.

3.Arc Force Potentiometer

Active only in the SMAW (stick) mode. Adjusts the slope of the machine to give greater short circuit currents, necessary when using certain manual electrodes. When set to “0”, there is no arc force action, giving a soft, buttery arc characteristic. When adjusted towards “10”, the higher arc force action gives the arc a “digging” characteristic, which can help prevent the electrode from sticking to the work. The setting of this control has no effect in any other mode.

4.LN-9 / NA-5 On/Off Switch

This switch is set to “On” only when used with LN-9 and NA-5 wire feed units. For all other equipment, this switch is to be set to “Off”. For proper operating with LN-9 and NA-5 wire feed units, the Output Control switch must be set to Remote, and the LN-9/NA-5 switch must be set to “On”.

– 13 –