Miller Invision 352 MPa Auto-Line CE User manual

Arc Welding Power Source
Processes
Description
MIG (GMAW) and Pulsed MIG
(GMAW-P) Welding
Air Carbon Arc (CAC-A) Cutting
and Gouging
TM-246193K 2021−11
Eff w/Serial No. MA021803A
Invision 352 MPa
Auto-Line
™
File: MULTIPROCESS
™
For product information, Own-
er’s Manual translations, and
more, visit
www.MillerWelds.com Proprietary Information - Do not distribute or allow to be used by unqualified persons.

INFORMATION ON OLDER UNITS
This manual includes operating information for current units. To obtain specific operating information for older models, download the applica-
ble Owner’s Manual from www.MillerWelds.com
Effective with ME100269U, IGBT Module Kit No. 217 625 was discontinued. See Parts List and Service Memo 1233 for additional informa-
tion.
Effective with ME224001U, 115 volts AC is no longer available at remote 14 receptacle RC50.
See the Miller Extranet for service memos that may aid in the repair of this product.

TABLE OF CONTENTS
SECTION 1 −SAFETY PRECAUTIONS FOR SERVICING 1........................................
1-1. Symbol Usage 1.......................................................................
1-2. Servicing Hazards 1....................................................................
1-3. California Proposition 65 Warnings 2......................................................
1-4. EMF Information 2.....................................................................
SECTION 2 −DEFINITIONS 3..................................................................
2-1. Manufacturer Safety Symbols And Definitions 3.............................................
2-2. Miscellaneous Symbols And Definitions 5..................................................
SECTION 3 −SPECIFICATIONS 6..............................................................
3-1. Features And Benefits 6................................................................
3-2. Arc Controls 6.........................................................................
3-3. Serial Number And Rating Label Location 6................................................
3-4. Software Licensing Agreement 6.........................................................
3-5. Information About Default Weld Parameters And Settings 6...................................
3-6. Unit Specifications 6....................................................................
3-7. Dimensions And Weight 7...............................................................
3-8. Environmental Specifications 7...........................................................
3-9. Duty Cycle And Overheating 8...........................................................
3-10. Static Output Characteristics 8...........................................................
SECTION 4 −INSTALLATION 9................................................................
4-1. Selecting A Location 9..................................................................
4-2. Selecting Cable Sizes* 10................................................................
4-3. Weld Output Terminals 10................................................................
4-4. Remote 14 Receptacle Information 11......................................................
4-5. Optional 115 Volts AC Duplex Receptacle And Supplementary Protectors 11.....................
4-6. Electrical Service Guide 12...............................................................
4-7. Connecting 1-Phase Input Power 14.......................................................
4-8. Connecting 3-Phase Input Power 16.......................................................
SECTION 5 −GENERAL OPERATION 18.........................................................
5-1. Front Panel 18..........................................................................
5-2. Configuration Option Menu 19.............................................................
5-3. Factory Reset Procedure 20..............................................................
SECTION 6 −GMAW/GMAW-P/FCAW OPERATION 21.............................................
6-1. Typical Connection For Remote Control Feeder GMAW/GMAW-P/FCAW Process 21..............
6-2. MIG Welding Mode - GMAW/FCAW Process 22..............................................
6-3. MIG - Wire and Gas Selection Table 23.....................................................
6-4. Pulsed MIG Welding Mode - GMAW-P Process 24...........................................
6-5. Pulsed MIG - Wire and Gas Selection Table 25..............................................
6-6. Remote Process Select 26...............................................................
SECTION 7 −THEORY OF OPERATION 28.......................................................

TABLE OF CONTENTS
SECTION 8 −TROUBLESHOOTING 31..........................................................
8-1. Troubleshooting Flowchart 31.............................................................
8-2. Checking Unit Before Applying Power 32...................................................
8-3. Measuring/Discharging Input Capacitor Voltage Before Working On Unit 33.......................
8-4. Input Pre-Regulator Module (MOD1) 34.....................................................
8-5. Input Pre-Regulator Module (MOD1) Test Point Values 34.....................................
8-6. Inverter Module (MOD2) 35...............................................................
8-7. Inverter Module (MOD2) Test Point Values 35................................................
8-8. Power Interconnect Board PC2 36.........................................................
8-9. Power Interconnect Board PC2 Test Point Values 36..........................................
SECTION 8 −TROUBLESHOOTING (Continued) 31...............................................
8-10. Control Board PC1 37...................................................................
8-11. Control Board PC1 −Test Point Values 37...................................................
8-12. Power Switch (S1) 38....................................................................
8-13. Output Diodes D1, D2 39.................................................................
8-14. Output Diodes D1, D2 Test Point Values 39.................................................
8-15. Troubleshooting Table 40.................................................................
8-16. Help Displays 42........................................................................
8-17. Factory Reset Procedure 43..............................................................
8-18. Troubleshooting Circuit Diagram 44........................................................
8-19. Control Board PC1 Testing Information (Use with Section 8-20) 46..............................
8-20. Control Board PC1 Test Point Values 47....................................................
8-21. Control Board PC1 - Power Off Checks 50..................................................
8-22. Control Board PC1 −Power Off Checks 51..................................................
8-23. Power Interconnect Board PC2 Testing Information (Use with Section 8-24) 52....................
8-24. Power Interconnect Board PC2 Test Point Values 53..........................................
8-25. Power Interconnect Board (PC2) - Power Off Checks (Prior To MB510232A) 56...................
8-26. Power Interconnect Board (PC2) - Power Off Checks (Prior To MB510232A) 57...................
8-27. Power Interconnect Board (PC2) - Power Off Checks
(Effective With MB510232A Thru MH474076U) 58............................................
8-28. Power Interconnect Board (PC2) - Power Off Checks
(Effective With MB510232A Thru MH474076U) 59............................................
8-29. Power Interconnect Board (PC2) - Power Off Checks (Effective With MH474077U) 60..............
8-30. Power Interconnect Board (PC2) - Power Off Checks (Effective With MH474077U) 61..............
8-31. Front Panel/Display Board PC3 Testing Information (Use with Section 8-32) 62....................
8-32. Front Panel/Display Board PC3 Test Point Values 63..........................................
8-33. Checking Unit Output After Servicing 64....................................................
SECTION 9 −MAINTENANCE 65................................................................
9-1. Routine Maintenance 65.................................................................
9-2. Blowing Out Inside Of Unit 65.............................................................
9-3. Removing Fan Motor 66..................................................................
SECTION 10 −ELECTRICAL DIAGRAMS 67......................................................

TM-246193 Page 1Invision 352 MPa
SECTION 1 −SAFETY PRECAUTIONS FOR SERVICING
7
Protect yourself and others from injury — read, follow, and save these important safety precautions and operating instructions.
1-1. Symbol Usage OM-246193-U, safety_stm 2020-02
DANGER! −Indicates a hazardous situation which, if
not avoided, will result in death or serious injury. The
possible hazards are shown in the adjoining symbols
or explained in the text.
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury. The possible
hazards are shown in the adjoining symbols or ex-
plained in the text.
NOTICE −Indicates statements not related to personal injury.
Indicates special instructions.
This group of symbols means Warning! Watch Out! ELECTRIC
SHOCK, MOVING PARTS, and HOT PARTS hazards. Consult sym-
bols and related instructions below for necessary actions to avoid
these hazards.
1-2. Servicing Hazards
The symbols shown below are used throughout this manual
to call attention to and identify possible hazards. When you
see the symbol, watch out, and follow the related instructions
to avoid the hazard.
Only qualified persons should install, operate, maintain, and
repair this equipment. A qualified person is defined as one
who, by possession of a recognized degree, certificate, or
professional standing, or who by extensive knowledge, train-
ing and experience, has successfully demonstrated the
ability to solve or resolve problems relating to the subject
matter, the work, or the project and has received safety train-
ing to recognize and avoid the hazards involved.
During servicing, keep everybody, especially children, away.
Do not touch live electrical parts.
Turn Off welding power source and wire feeder
and disconnect and lockout input power using
line disconnect switch, circuit breakers, or by removing plug from re-
ceptacle, or stop engine before servicing unless the procedure spe-
cifically requires an energized unit.
ELECTRIC SHOCK can kill.
Do not work on equipment unless it has been verified that the ma-
chine case is not energized.
Insulate yourself from ground by standing or working on dry insulat-
ing mats big enough to prevent contact with the ground.
Do not leave live unit unattended.
If this procedure requires an energized unit, have only personnel
familiar with and following standard safety practices do the job.
When testing a live unit, use the one-hand method. Do not put both
hands inside unit. Keep one hand free.
Disconnect input power conductors from deenergized supply line
BEFORE moving a welding power source.
SIGNIFICANT DC VOLTAGE exists in inverter weld-
ing power sources AFTER removal of input power.
Turn off unit, disconnect input power, and discharge input capaci-
tors according to instructions in Manual before touching any parts.
Arc flash is the rapid and violent release of energy that
occurs when electric current leaves its intended path
and arcs to other conductors or to ground. Arc flash
can be caused by equipment failure (faulty insulation,
corrosion, dust) improper installation, human error (improper tool
placement), and other factors. Conductive vapors can sustain the
arc until over-current devices open the circuit. Individuals within
the arc flash boundary are at risk.
Do not work on energized equipment unless an assessment of
arc flash risk from the electrical supply circuit has been conducted
by a qualified person and you have been trained in safe work prac-
tices by your employer.
Follow requirements in NFPA 70E for safe work practices and
Personal Protective Equipment (PPE).
ARC FLASH can kill.
STATIC (ESD) can damage PC boards.
Put on grounded wrist strap BEFORE handling
boards or parts.
Use proper static-proof bags and boxes to
store, move, or ship PC boards.
FIRE OR EXPLOSION hazard.
Do not place unit on, over, or near combustible
surfaces.
Do not service unit near flammables.
FLYING METAL or DIRT can injure eyes.
Wear safety glasses with side shields or face
shield during servicing.
Be careful not to short metal tools, parts, or
wires together during testing and servicing.
HOT PARTS can burn.
Do not touch hot parts bare handed.
Allow cooling period before working on
equipment.
To handle hot parts, use proper tools and/or wear heavy, insu-
lated welding gloves and clothing to prevent burns.

TM-246193 Page 2 Invision 352 MPa
EXPLODING PARTS can injure.
Failed parts can explode or cause other parts to
explode when power is applied to inverters.
Always wear a face shield and long sleeves
when servicing inverters.
SHOCK HAZARD from testing.
Turn Off welding power source and wire feeder
or stop engine before making or changing me-
ter lead connections.
Use at least one meter lead that has a self-
retaining spring clip such as an alligator clip.
Read instructions for test equipment.
FALLING EQUIPMENT can injure.
Use lifting eye to lift unit only, NOT running
gear, gas cylinders, or any other accessories.
Use correct procedures and equipment of ade-
quate capacity to lift and support unit.
If using lift forks to move unit, be sure forks are long enough to
extend beyond opposite side of unit.
Follow the guidelines in the Applications Manual for the Revised
NIOSH Lifting Equation (Publication No. 94−110) when manu-
ally lifting heavy parts or equipment.
MOVING PARTS can injure.
Keep away from moving parts such as fans.
Keep away from pinch points such as drive
rolls.
Have only qualified persons remove doors,
panels, covers, or guards for maintenance and
troubleshooting as necessary.
Keep hands, hair, loose clothing, and tools
away from moving parts.
Reinstall doors, panels, covers, or guards
when maintenance is finished and before re-
connecting input power.
ELECTRIC AND MAGNETIC FIELDS (EMF)
can affect Implanted Medical Devices.
Wearers of Pacemakers and other Implanted
Medical Devices should keep away from serv-
icing areas until consulting their doctor and the
device manufacturer.
OVERUSE can cause OVERHEATING.
Allow cooling period; follow rated duty cycle.
Reduce current or reduce duty cycle before
starting to weld again.
Do not block or filter airflow to unit.
H.F. RADIATION can cause interference.
High-frequency (H.F.) can interfere with radio
navigation, safety services, computers, and
communicationsequipment.
Have only qualified persons familiar with electronic equipment
install, test, and service H.F. producing units.
The user is responsible for having a qualified electrician prompt-
ly correct any interference problem resulting from the installa-
tion.
If notified by the FCC about interference, stop using the
equipment at once.
Have the installation regularly checked and maintained.
Keep high-frequency source doors and panels tightly shut, keep
spark gaps at correct setting, and use grounding and shielding to
minimize the possibility of interference.
READ INSTRUCTIONS.
Use Testing Booklet (Part No. 150 853) when
servicing this unit.
Consult the Owner’s Manual for welding safety
precautions.
Use only genuine replacement parts from the manufacturer.
Read and follow all labels and the Technical Manual carefully be-
fore installing, operating, or servicing unit. Read the safety in-
formation at the beginning of the manual and in each section.
Perform installation, maintenance, and service according to the
Technical Manual, industry standards, and national, state, and
local codes.
1-3. California Proposition 65 Warnings
WARNING: This product can expose you to chemicals in-
cluding lead, which are known to the state of California to
cause cancer and birth defects or other reproductive
harm.
For more information, go to www.P65W arnings.ca.gov .
1-4. EMF Information
Electric current flowing through any conductor causes localized electric
and magnetic fields (EMF). The current from arc welding (and allied pro-
cesses including spot welding, gouging, plasma arc cutting, and
induction heating operations) creates an EMF field around the welding
circuit. EMF fields can interfere with some medical implants, e.g. pace-
makers. Protective measures for persons wearing medical implants
have to be taken. For example, restrict access for passers−by or con-
duct individual risk assessment for welders. All welders should use the
following procedures in order to minimize exposure to EMF fields from
the welding circuit:
1. Keep cables close together by twisting or taping them, or using a
cable cover.
2. Do not place your body between welding cables. Arrange cables
to one side and away from the operator.
3. Do not coil or drape cables around your body.
4. Keep head and trunk as far away from the equipment in the
welding circuit as possible.
5. Connect work clamp to workpiece as close to the weld as
possible.
6. Do not work next to, sit or lean on the welding power source.
7. Do not weld whilst carrying the welding power source or wire
feeder.
About Implanted Medical Devices:
Implanted Medical Device wearers should consult their doctor and the
device manufacturer before performing or going near arc welding, spot
welding, gouging, plasma arc cutting, or induction heating operations.
If cleared by your doctor, then following the above procedures is recom-
mended.

TM-246193 Page 3
Invision 352 MPa
SECTION 2 −DEFINITIONS
2-1. Manufacturer Safety Symbols And Definitions
Some symbols are found only on CE products.
Warning! Watch Out! There are possible hazards as shown by the symbols.
Safe1 2012−05
When power is applied failed parts can explode or cause other parts to explode.
Safe26 2012−05
Wear dry insulating gloves. Do not touch electrode with bare hand. Do not wear wet or damaged gloves.
Safe2 2017−04
Protect yourself from electric shock by insulating yourself from work and ground.
Safe3 2017−04
Disconnect input plug or power before working on machine.
Safe5 2017−04
Keep your head out of the fumes.
Safe6 2017−04
Use forced ventilation or local exhaust to remove the fumes.
Safe8 2012−05
Use ventilating fan to remove fumes.
Safe10 2012−05
Keep flammables away from welding. Do not weld near flammables.
Safe12 2012−05

OM-252 203 Page 4
Welding sparks can cause fires. Have a fire extinguisher nearby, and have a watchperson ready to use it.
Safe14 2012−05
Do not weld on drums or any closed containers.
Safe16 2017−04
Do not remove or paint over (cover) the label.
Safe20 2017−04
Flying pieces of parts can cause injury. Always wear a face shield when servicing unit.
Safe27 2012−05
Always wear long sleeves and button your collar when servicing unit.
Safe28 2012−05
After taking proper precautions as shown, connect power to unit.
Safe29 2012−05
Do not use one handle to lift or support unit.
Safe31 2017−04
Wear hat and safety glasses. Use ear protection and button shirt
collar. Use welding helmet with correct shade of filter. Wear complete
body protection.
Safe38 2012−05
Kasjf;laksf;lkasdf'l;aksdf;lkasd;flksadflkasd;lk
Kasjf;laksf;lkasdf'l;aksdf;lkasd;flksadflkasd;lk
Kasjf;laksf;lkasdf'l;aksdf;lkasd;flksadflkasd;lk
Become trained and read the instructions before working on the
machine or welding.
Safe40 2012−05
>5min
V
V
V
Hazardous voltage remains on input capacitors after power is turned
off. Do not touch fully charged capacitors. Always wait 5 minutes after
power is turned off before working on unit, AND check input capacitor
voltage, and be sure it is near 0 before touching any parts.
Safe43 2017−04
=<60°Always lift and support unit using both handles. Keep angle of lifting
device less than 60 degrees.
Use a proper cart to move unit.
Safe44 2012−05

TM-246193 Page 5
Invision 352 MPa
2-2. Miscellaneous Symbols And Definitions
Some symbols are found only on CE products.
Increase
Press
Percent
Input Power Or
Input Voltage
On
Three Phase
Remote
Off
Single Phase
Arc Control
VVolts
Read Instructions
Positive
AAmperes
Output
Negative
Notes

TM-246193 Page 6 Invision 352 MPa
SECTION 3 −SPECIFICATIONS
3-1. Features And Benefits
Auto-LinetPower Management Technology is circuitry that automatically adapts the power source to the primary voltage being applied (see Sec-
tions 4-7 and 4-8).
LVCtLine Voltage Compensation is circuitry that keeps the power source output constant regardless of input power fluctuation.
Wind Tunnel Technologytcirculates air over components that require cooling, not over electronic circuitry, which reduces contaminants and im-
proves reliability in harsh welding environments.
Fan-On-Demandtcooling system operates only when needed, reducing noise, energy use and the amount of contaminants pulled through the ma-
chine.
Thermal Overload Protection automatically shuts down the unit, only when necessary to prevent damage to internal components if the duty cycle
is exceeded or air flow and cooling are restricted (see Section 3-9).
Auto Remote Sense enables the unit to automatically sense the connection of a remote control.
Synergic Pulsed MIG Operation With A Synergic Feeder allows single knob control of the arc. As wirefeed speed is increased or decreased, the
pulse parameters increase or decrease matching the power output to the wire speed.
3-2. Arc Controls
Inductance influences the arc stiffness, bead width and appearance, and puddle fluidity in MIG Welding Mode
(see Section 6-2).
SharpArctoptimizes the size and shape of the arc cone, bead width and appearance, and puddle fluidity in Pulsed MIG Welding Mode (see Section
6-4).
3-3. Serial Number And Rating Label Location
The serial number and rating information for this product is located inside the case. Use rating label to determine input power requirements and/or
rated output. For future reference, write serial number in space provided on back cover of this manual.
3-4. Software Licensing Agreement
The End User License Agreement and any third-party notices and terms and conditions pertaining to third-party software can be found at
https://www .millerwelds.com/eula and are incorporated by reference herein.
3-5. Information About Default Weld Parameters And Settings
NOTICE −Each welding application is unique. Although certain Miller Electric products are designed to determine and default to certain typical welding
parameters and settings based upon specific and relatively limited application variables input by the end user, such default settings are for reference
purposes only; and final weld results can be affected by other variables and application-specific circumstances. The appropriateness of all parameters
and settings should be evaluated and modified by the end user as necessary based upon application-specific requirements. The end user is solely
responsible for selection and coordination of appropriate equipment, adoption or adjustment of default weld parameters and settings, and ultimate
quality and durability of all resultant welds. Miller Electric expressly disclaims any and all implied warranties including any implied warranty of fitness
for a particular purpose.
3-6. Unit Specifications
Do not use information in unit specifications table to determine electrical service requirements. See Sections 4-6 and 4-8 for information on con-
necting input power.
This equipment will deliver rated output at an ambient air temperature up to 1045F (405C).
Input
Power Rated Output
Voltage
Range in CV Mode
Amperage
Range in
CC Mode
Max.
Open-
Circuit
Voltage
RMS Amps Input at Rated Load Output,
60 Hz 3-Phase at NEMA Load Voltages
and Class I Rating
KVA KW
208 V 230 V 400 V 460 V 575 V
3-Phase 350 A at 34
VDC, 60%
Duty Cycle
10−38 V 5−425 A 75 VDC 40.4 36.1 20.6 17.8 14.1 14.2 13.6
1-Phase 300 A at 32
VDC, 60%
Duty Cycle*
60.8 54.6 29.7 25.4 19.9 11.7 11.2
*See Section 3-9 for Duty Cycle Rating.

TM-246193 Page 7
Invision 352 MPa
3-7. Dimensions And Weight
Hole Layout Dimensions
24 in.
(610
mm)
17 in.
(432 mm)
12-1/2 in.
(318 mm)
804801-A
A
D
C
B
E
G
F
A11-3/4 in. (298 mm)
B1-11/16 in. (42 mm)
C15-3/4 in. (400 mm)
D19-3/32 in. (485 mm)
E8-11/16 in. (221 mm)
F1-17/32 in. (39 mm)
G1/4-20 UNC -2B thread
Weight
80 lb (36.3 kg)
93.5 lb (42.4 kg)
w/optional 115 VAC
3-8. Environmental Specifications
A. Temperature Specifications
Operating Temperature Range* Storage/Transportation Temperature Range
14 to 104°F (−10 to 40°C)
*Output is derated at temperatures above 104°F (40°C).
−4 to 131°F (−20 to 55°C)
Temp1_016- 08
Notes

TM-246193 Page 8 Invision 352 MPa
THREE PHASE
OPERATION
SINGLE
PHASE
OPERATION
6AWG POWER CORD
8AWG POWER CORD
% DUTY CYCLE
10 15 20 25 30 40 50 60 70 80 90 100
WELDING AMPERES
100
150
200
250
300
350
400
425
500
3-9. Duty Cycle And Overheating
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, output stops, a Help
message is displayed and cooling fan
runs. Wait fifteen minutes for unit to
cool. Reduce amperage or voltage, or
duty cycle before welding.
Single Phase Operation: The
unit is supplied with a 8 AWG
power cord. The rated output
with 8 AWG is 300 amps, 32
volts at 40% duty cycle. To
achieve 60% duty cycle change
cord to 6 AWG.
NOTICE −Exceeding duty cycle can
damage unit and void warranty.
Ref. 216568-A
6 Minutes Welding 4 Minutes Resting
60% Duty Cycle
Overheating 0
15
A or V
OR
Reduce Duty Cycle
Minutes
3-10. Static Output Characteristics
The static (output) characteristics of the welding power source can be described as flat during the GMAW process and drooping during the SMAW
and GTAW processes. Static characteristics are also affected by control settings (including software), electrode, shielding gas, weldment material,
and other factors. Contact the factory for specific information on the static characteristics of the welding power source.

TM-246193 Page 9
Invision 352 MPa
SECTION 4 −INSTALLATION
!Special installation may be
required where gasoline or
volatile liquids are present −
see NEC Article 511 or CEC
Section 20.
1 Lifting Forks
Extend forks beyond opposite side
of unit.
2Lifting Handles
Use handles to lift unit.
3Hand Cart
Use cart or similar device to move
unit.
4 Line Disconnect Device
Locate unit near correct input
power supply.
4-1. Selecting A Location
4
18 in.
(460 mm)
18 in.
(460 mm)
OR
1
Movement
Location And Airflow
2
3
2
!Do not move or operate unit
where it could tip.
loc_med 2015-04
Notes

TM-246193 Page 10 Invision 352 MPa
4-2. Selecting Cable Sizes*
NOTICE −The Total Cable Length in Weld Circuit (see table below) is the combined length of both weld cables. For example, if the power source
is 100 ft (30 m) from the workpiece, the total cable length in the weld circuit is 200 ft (2 cables x 100 ft). Use the 200 ft (60 m) column to determine
cable size.
Weld Cable Size** and Total Cable (Copper) Length in Weld Circuit
Not Exceeding***
100 ft (30 m) or Less 150 ft
(45 m)
200 ft
(60 m)
250 ft
(70 m)
300 ft
(90 m)
350 ft
(105 m)
400 ft
(120 m)
Welding
Amperes
10 −60%
Duty
Cycle
AWG (mm2)
60 −100%
Duty Cycle
AWG (mm2)
10 −100% Duty Cycle
AWG (mm2)
100 4 (20) 4 (20) 4 (20) 3 (30) 2 (35) 1 (50) 1/0 (60) 1/0 (60)
150 3 (30) 3 (30) 2 (35) 1 (50) 1/0 (60) 2/0 (70) 3/0 (95) 3/0 (95)
200 3 (30) 2 (35) 1 (50) 1/0 (60) 2/0 (70) 3/0 (95) 4/0 (120) 4/0 (120)
250 2 (35) 1 (50) 1/0 (60) 2/0 (70) 3/0 (95) 4/0 (120) 2x2/0 (2x70) 2x2/0 (2x70)
300 1 (50) 1/0 (60) 2/0 (70) 3/0 (95) 4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95) 2x3/0 (2x95)
350 1/0 (60) 2/0 (70) 3/0 (95) 4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95) 2x3/0 (2x95) 2x4/0 (2x120)
400 1/0 (60) 2/0 (70) 3/0 (95) 4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95) 2x4/0 (2x120) 2x4/0 (2x120)
500 2/0 (70) 3/0 (95) 4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95) 2x4/0 (2x120) 3x3/0 (3x95) 3x3/0 (3x95)
600 3/0 (95) 4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95) 2x4/0 (2x120) 3x3/0 (3x95) 3x4/0 (3x120) 3x4/0 (3x120)
700 4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95) 2x4/0 (2x120) 3x3/0 (3x95) 3x4/0 (3x120) 3x4/0 (3x120) 4x4/0 (4x120)
800 4/0 (120) 2x2/0 (2x70) 2x3/0 (2x95) 2x4/0 (2x120) 3x4/0 (3x120) 3x4/0 (3x120) 4x4/0 (4x120) 4x4/0 (4x120)
900 2x2/0 (2x70) 2x3/0 (2x95) 2x4/0 (2x120) 3x3/0 (3x95)
* This chart is a general guideline and may not suit all applications. If cable overheats, use next size larger cable.
**Weld cable size (AWG) is based on either a 4 volts or less drop or a current density of at least 300 circular mils per ampere.
( ) = mm2for metric use
***For distances longer than those shown in this guide, see AWS Fact Sheet No. 39, Welding Cables, available from the American Welding
Society at http://www.aws.org.
Ref. S-0007-M 2017−08
4-3. Weld Output Terminals
!Turn off power before connecting
to weld output terminals.
!Do not use worn, damaged, un-
dersized, or repaired cables.
1 Positive (+) Weld Output Terminal
2 Negative (−) Weld Output Terminal
See Section 6-1 for standard con-
nection diagrams.
Ref. 804772-B / output term1 2015−02
2
1

TM-246193 Page 11
Invision 352 MPa
4-4. Remote 14 Receptacle Information
AJ
BKI
CLNH
DMG
EF
Socket* Socket Information
24 VOLTS AC
A24 volts AC. Protected by supplementary protect-
or CB2.
BContact closure to A completes 24 volts AC
contactor control circuit.
REMOTE
OUTPUT
CONTROL
COutput to remote control; 0 to +10 volts DC, +10
volts DC in MIG mode.
DRemote control circuit common.
E0 to +10 volts DC input command signal from
remote control.
LWirefeed speed command, 0 to +10 volts DC out-
put signal from wire feeder.
MCC/CV select 0 to +10 volts DC.
NWirefeed speed common.
A/V
AMPERAGE
VOLTAGE
FCurrent feedback; +1 volt DC per 100 amperes.
HVoltage feedback; +1 volt DC per 10 output recep-
tacle volts.
GND
GCircuit common for 24 volts AC circuits.
KChassis common.
*The remaining sockets are not used.
803691-E
1 115 V 10 Amp AC Receptacle
2 Supplementary Protector CB1
3 Supplementary Protector CB2
CB1 protects duplex receptacle
from overload.
CB2 protects 24 volts AC portion of
Remote 14 receptacle from
overload.
Press button to reset supplement-
ary protector.
2 3
1
4-5. Optional 115 Volts AC Duplex Receptacle And Supplementary Protectors

TM-246193 Page 12 Invision 352 MPa
4-6. Electrical Service Guide Elec Serv 2020−02
NOTICE −INCORRECT INPUT POWER can damage this welding power source. Phase to ground voltage shall not exceed +10% of rated input
voltage.
NOTICE −Actual input voltage should not be 10% less than minimum and/or 10% more than maximum input voltages listed in table. If actual input
voltage is outside this range, output may not be be available.
Failure to follow these electrical service guide recommendations could create an electric shock or fire hazard. These recommenda-
tions are for a dedicated circuit sized for the rated output and duty cycle of the welding power source.
In dedicated circuit installations, the National Electrical Code (NEC) allows the receptacle or conductor rating to be less than the rating
of the circuit protection device. All components of the circuit must be physically compatible. See NEC articles 210.21, 630.11, and
630.12.
60 Hz 1-Phase
Rated Supply Voltage (V) 208 230 400 460 575
Rated Maximum Supply Current I1max (A) 54.1 48.4 26.6 22.8 17.8
Maximum Effective Supply Current I1eff (A) 34.2 30.6 16.8 14.4 11.3
Maximum Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
60 60 30 25 20
Normal Operating Fuses
3
80 70 40 30 25
Maximum Recommended Supply Conductor Length In Feet (Meters)
4
78 (24) 96 (29) 118 (36) 103 (31) 161 (49)
Raceway Installation
Minimum Supply Conductor Size In AWG (mm
2
)
5
8 (10) 8 (10) 12 (4.0) 14 (2.5) 14 (2.5)
Minimum Grounding Conductor Size In AWG (mm
2)
5
8 (10) 8 (10) 12 (4.0) 14 (2.5) 14 (2.5)
60 Hz 3-Phase
Rated Supply Voltage (V) 208 230 400 460 575
Rated Maximum Supply Current I1max (A) 51.5 46.5 26.3 22.6 18
Maximum Effective Supply Current I1eff (A) 28.7 26.3 14.9 13.0 10.1
Maximum Recommended Standard Fuse Rating In Amperes
1
Time-Delay Fuses
2
60 50 30 25 20
Normal Operating Fuses
3
70 60 35 30 25
Maximum Recommended Supply Conductor Length In Feet (Meters)
4
60 (18) 73 (22) 88 (27) 118 (36) 185 (56)
Raceway Installation
Minimum Supply Conductor Size In AWG (mm
2
)
5
10 (6.0) 10 (6.0) 14 (2.5) 14 (2.5) 14 (2.5)
Minimum Grounding Conductor Size In AWG (mm
2)
5
10 (6.0) 10 (6.0) 14 (2.5) 14 (2.5) 14 (2.5)
Reference: 2020 National Electrical Code (NEC) (including article 630)
1 If a circuit breaker is used in place of a fuse, choose a circuit breaker with time-current curves comparable to the recommended fuse.
2 “Time-Delay” fuses are UL class “RK5” . See UL 248.
3 “Normal Operating” (general purpose - no intentional delay) fuses are UL class “K5” (up to and including 60 amps), and UL class “H” ( 65 amps and
above).
4 Maximum total length of copper input conductors in entire installation, raceway and/or flexible cord.
5 Raceway conductor data in this section specifies conductor size (excluding flexible cord or cable) between the panelboard and the equipment per
NEC Table 310.15(B)(16) and is based on allowable ampacities of insulated copper conductors having a temperature rating of 75°C (167°F) with not
more than three single current−carrying conductors in a raceway.

TM-246193 Page 13
Invision 352 MPa
Notes

TM-246193 Page 14 Invision 352 MPa
4-7. Connecting 1-Phase Input Power
Tools Needed:
7
6
L1
L2
1
=GND/PE Earth Ground
3
1
8
9
10
1
6
54
2
3
input1 2012−05 −Ref. 803766-C / 803691-E

TM-246193 Page 15
Invision 352 MPa
4-7. Connecting 1-Phase Input Power (Continued)
!Installation must meet all National and
Local Codes −have only qualified per-
sons make this installation.
!Disconnect and lockout/tagout input
power before connecting input con-
ductors from unit. Follow established
procedures regarding the installation
and removal of lockout/tagout devices.
!Always connect green or green/yellow
conductor to supply grounding termi-
nal first, and never to a line terminal.
NOTICE −The Auto-Line circuitry in this unit
automatically adapts the power source to the
primary voltage being applied. Check input
voltage available at site. This unit can be con-
nected to any input power between 208 and
575 VAC without removing cover to relink the
power source.
See rating label on unit and check input volt-
age available at site.
1 Black And White Input Conductor (L1
And L2)
2 Red Input Conductor
3 Green Or Green/Yellow Grounding
Conductor
4 Insulation Sleeving
5 Electrical Tape
Insulate and isolate red conductor as shown.
6 Input Power Cord.
7 Disconnect Device (switch shown in the
OFF position)
8 Disconnect Device Grounding Terminal
9 Disconnect Device Line Terminals
Connect green or green/yellow grounding
conductor to disconnect device grounding ter-
minal first.
Connect input conductors L1 and L2 to discon-
nect device line terminals.
10 Over-Current Protection
Select type and size of over-current protection
using Section 4-6 (fused disconnect switch
shown).
Close and secure door on disconnect device.
Follow established lockout/tagout procedures
to put unit in service.
input1 2012−05
Notes
Work like a Pro!
Pros weld and cut
safely. Read the
safety rules at
the beginning
of this manual.

TM-246193 Page 16 Invision 352 MPa
4-8. Connecting 3-Phase Input Power
Tools Needed:
= GND/PE Earth Ground
L1
2
1
L2
L3
3
3
4
5
6
7
input2 2012−05 −Ref. 803766-C / 803691-E