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B-3
CONTROLS AND SETTINGS
All operator controls and adjustments are located on the case front of the DC-655. Refer to Figures B.1, and B.2
and corresponding explanations.
1. INPUT
POWER ON/OFF SWITCH - This tog-
gle switch turns the machine on or off. Putting the
switch in the ON
machineʼs input contactor applying input power to
the machine.
Switching the switch to the
OFF
position de-energizes the input contactor.
This switch is also used to reset a machine shut-
down. (See Machine Shutdown section)
2. PILOT LIGHT - When the power switch is in the
ON position the machineʼs white pilot light will illu-
minate. If the input contactor de-energizes the
machine in a shutdown situation the pilot will still
illuminate. In this situation it will be necessary to
reset the machine by switching the power switch to
the OFF then ON position. (See Machine
Shutdown section)
3. OUTPUT
CONTROL - This control provides
continuous control of the machineʼs output from
minimum to maximum as it is rotated clockwise.
The CV mode voltage range of control is 13 to 44V.
The CC mode current range of control is 50 to
815A.
4. OUTPUT TERMINALS ON/REMOTE - When this
switch is in the REMOTE
output terminals will be electrically "cold" until a
OPERATION
8
3
DC-655
FIGURE B.1 CONTROL PANEL CONTROLS
position energizes the
position, the DC-655ʼs
7
remote device such as a wire feeder closes the #2
and #4 circuit in the MS-receptacle or terminal strip.
When this switch is in the ON position the
machineʼs output terminals will be electrically ener-
gized all the time.
5. LOCAL/REMOTE CONTROL SWITCH - When this
switch is set to the LOCAL
the output voltage is via the output control on the
DC-655ʼs control panel. When this switch is set to
the REMOTE
remote source such as a wire feeder via the #75,
#76, and #77 leads in the MS-receptacle or terminal
strip.
6. CC STICK/CV SUBARC/CV MIG MODE SWITCH -
This switch selects the proper welding characteris-
tics for the process being used:
CC Stick provides a constant current output
characteristic through the 50 to 815 amp range.
The current is adjusted within this range by the
Output Control dial. The open circuit (no load)
voltage will be about 68 volts in this mode.
DC-655
9
2
5
6
4
position, control of
position, control is through a
B-3
1
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