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

POWER WAVE ® STT ® MODULE
CAUTION
Regarding cable placement, best results will be obtained when
control cables are routed separate from the weld cables. This mini-
mizes 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 communica-
tion cables including ArcLink ®
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CONNECTION BETWEEN POWER SOURCE AND STT
MODULE (ARCLINK ® AND DIFFERENTIAL I/O PIGTAILS)
The pigtail connections on the STT
lines required for proper operation. With the STT
tened to the power source, connect the pigtails to their respective
receptacles on the back of the power source per the connection dia-
grams located in the "Installation Section".
Special Instructions:
K2902-2
Some earlier vintage S350 power sources (Code 11589) may not
include a 6-pin Differential I/O receptacle. If the receptacle is not pre-
sent on the host power source, contact the Lincoln Electric Service
Department to obtain an S350/STT Retrofit Kit (S28481).
STT Module to ArcLink ® Wire Feeders (K1543 or K2683 ArcLink
®
Control Cable)
The K2902-2 STT Module includes an ArcLink
®
connection to compatible wire feeders. The control cable consists of two
power leads, one twisted pair for digital communication, and one lead
for voltage sensing. The 5 pin ArcLink
lower rear portion of the STT Module. The control cable is keyed and
®
polarized to prevent improper connection. Best results will be obtained
when control cables are routed separate from the weld cables, especial-
ly in long distance applications. The recommended combined length of
the ArcLink ® control cable network should not exceed 200ft.

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
work lead from the negative (-) power source output stud to
the work piece per the Connection Diagram.
(See Figure A.5)
connections.
Module include all signal and power
®
Module securely fas-
®
® output receptacle for
® receptacle is located on the
Module. Connect a
®
• Negative Electrode Polarity: The STT
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 nega-
®
tive (-) 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)
®
Never reverse the polarity to the input of the STT
(DO NOT connect the negative stud of the power source to
input stud of the STT
®
the STT Module!
®
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®
-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
process CANNOT be run using
®
WARNING
Module). This may result in damage to
FIGURE A.2
CAUTION
®
Module
®