Voltage Control Response - Lincoln Electric NA-5N Service Manual

B-9
When "Stop" Button
Feed motor stops and
electrode burns back with
contactor delay (standard)
Feed motor inches up and
electrode burns back with
contactor delay
Feed motor inches up and
contactor opens
(no burnback)
VOLTAGE CONTROL
RESPONSE
The NA-5 is provided with selectable voltage
control response. Proper setting depends on
the power source and process being used.
Refer to the appropriate power source
connection
connection of the jumpers located on the
NA-5 Voltage P.C. Board, shown in Figure
B.3.
To change the voltage control response:
1. Turn off all input power to the NA-5
control.
2. Open the control box.
3. Locate the Voltage P.C. Board
mounted on the right side of the box.
Position the jumper plugs on the
Voltage
appropriate power source connection
diagram.
OPERATING INSTRUCTIONS
TABLE B.2 – STOPPING SEQUENCE SETTINGS.
is Pressed
Lead #693 to Pin 3
Lead #690 to Pin 4
Lead #693 to Pin 1
Lead #690 to Pin 4
Lead #693 to Pin 1
Lead #690 to Pin 2
diagram for the
P.C. Board per
NA-5
Older Models
*NOTE:
Indicates switch in up position
Indicates switch in down position
Indicates switch position does not matter
FIGURE B.3 – VOLTAGE CONTROL
RESPONSE JUMPER PLUG
proper
the
B-9
Newer Models*
1 2 3 4
Switch #2
1 2 3 4
Switch #2
1 2 3 4
Switch #2
LOCATIONS.
RED
JUMPER
PLUG
WHITE
JUMPER
PLUG
B
D
A