Connection Between Power Source And Stt Module; Electrode And Work Connections - Lincoln Electric POWER WAVE STT Operator's Manual

POWER WAVE ® STT ® MODULE (CE)
CAUTION
Regarding cable placement, best results will be obtained
when control cables are routed separate from the weld
cables. This minimizes the possibility of interference
between the high currents flowing through the weld cables,
and the low level signals in the control cables. These
recommendations apply to all communication cables
including ArcLink ® connections.
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CONNECTION BETWEEN POWER SOURCE AND STT
MODULE (ARCLINK AND DIFFERENTIAL I/O
®
PIGTAILS)
The pigtail connections on the STT
power lines required for proper operation. With the STT
securely fastened to the power source, connect the pigtails to
their respective receptacles on the back of the power source per
the connection diagram located in the "Installation Section".
Special Instructions:
K2921-1
A special ArcLink ® and Differential I/O receptacle kit is provided
with the STT Module for installation into the host power
®
source. Follow the instructions provided with the kit. (reference
instruction sheet M22499).

ELECTRODE AND WORK CONNECTIONS

Connect the electrode and work cables per the connection
diagrams included in this document. Size and route the cables
per the following:
• Positive Electrode Polarity: Most welding applications run
with the electrode being positive (+). For those applications,
connect the electrode cable between the wire drive feed
plate and the output stud on the STT Module. Connect a
work lead from the negative (-) power source output stud to
the work piece per the Connection Diagram.
(See Figure A.5)
• Negative Electrode Polarity: The STT process CANNOT be
run using negative electrode polarity. However, for processes
other than STT requiring negative polarity, such as some
Innershield applications, the electrode and work connections
should be reversed at the load, NOT at the input to the STT
Module. Connect the electrode cable to the negative (-) stud
of the power source, and work cable to the output stud of the
STT Module per the Negative Polarity Connection Diagram.
(See Figure A.2)
®
Module include all signal and
®
Module
®
WARNING
Never reverse the polarity at the input of the STT Module (DO
NOT connect the negative stud of the power source to input
stud of the STT Module). This may result in damage to the
STT Module!
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NEGATIVE POLARITY
CONNECTION
( NOT TO BE USED FOR
STT PROCESS)
CAUTION
Negative electrode polarity operation may require reconfig-
uration of the power source voltage sense leads. See the
Remote Sense Lead section in the power source instruction
manual for further details.
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For additional Safety information regarding the electrode and
work cable set-up, See the standard "SAFETY INFORMATION"
located in the front of the Instruction Manuals.
A-3
INSTALLATION
FIGURE A.2
TO ELECTRODE
(FEEDER)
TO WORK
TO WORK
TO ELECTRODE
(FEEDER)