Connection Of Ln-8 To Dc-250, 400 And Cv/Cvi Power Sources - Lincoln Electric LN-8 SVM132-A Service Manual

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FIGURE A.7 – CONNECTION OF LN-8 TO DC-250, 400 AND CV/CVI POWER SOURCES
21
NEGATIVE
THE ABOVE DIAGRAM SHOWS THE ELECTRODE CONNECTED POSITIVE. TO CHANGE POLARITY, TURN OFF THE POWER, REVERSE THE
ELECTRODE AND "TO WORK" LEADS AT THE POWER SOURCE, AND POSITION THE SWITCH ON THE POWER SOURCE AND WIRE FEEDER
(IF EQUIPPED) TO PROPER POLARITY. ALSO REFER TO THE FOLLOWING NOTE:
NOTE: IF LEAD #21 IS TO BE CONNECTED TO THE TERMINAL STRIP, CONNECT TO TERMINAL #21 THAT MATCHES WORK POLARITY. THIS
CONNECTION MUST BE CHANGED WHENEVER THE ELECTRODE POLARITY IS CHANGED. THIS DOES NOT APPLY TO DC-400 BELOW
CODE 9200 WITH POLARITY SWITCH.
N.A. WELDING CABLES MUST BE OF PROPER CAPACITY FOR THE CURRENT AND DUTY CYCLE OF IMMEDIATE AND FUTURE APPLICATIONS.
N.B. EXTEND LEAD #21 USING #14 OR LARGER INSULATED WIRE PHYSICALLY SUITABLE FOR THE INSTALLATION. AN S16586-[ ]
REMOTE VOLTAGE SENSING WORK LEAD IS AVAILABLE FOR THIS PURPOSE. CONNECT IT DIRECTLY TO THE WORK PIECE, KEEPING IT
ELECTRICALLY SEPARATE FROM THE WELDING WORK LEAD CIRCUIT AND CONNECTION. FOR CONVENIENCE, THIS EXTENDED LEAD #21
SHOULD BE TAPED TO THE WELDING WORK LEAD. (IF THE LENGTH OF THE WORK LEAD CIRCUIT IS SHORT, AND CONNECTIONS CAN BE
EXPECTED TO BE RELIABLE, THEN CONTROL CABLE LEAD #21 DOES NOT NEED TO BE EXTENDED AND CAN BE DIRECTLY CONNECTED
TO TERMINAL #21 ON THE TERMINAL STRIP. NOTE THAT THIS IS NOT THE PREFERRED CONNECTION BECAUSE IT ADDS ERROR TO THE
WIRE FEEDER VOLTMETER READING.)
N.C. TAPE UP BOLTED CONNECTION.
N.D. CONNECT THE LN-8 CONTROL CABLE GROUND LEAD TO THE FRAME TERMINAL MARKED
STRIP. THE POWER SOURCE GROUNDING TERMINAL STRIP (MARKED
CONNECTIONS) MUST BE PROPERLY CONNECTED TO ELECTRICAL GROUND PER THE POWER SOURCE OPERATING MANUAL.
N.E. IF USING AN OLDER LN-8 CONTROL CABLE (PRIOR TO USE OF A, B, AND C MARKING): CONNECT LEAD #75 TO #75 ON TERMINAL
STRIP, CONNECT LEAD #76 TO #76 ON TERMINAL STRIP, AND CONNECT LEAD #77 TO #77 ON THE TERMINAL STRIP.
INSTALLATION
WARNING
TURN OFF INPUT POWER
TO THE WELDING POWER
SOURCE USING THE
DISCONNECT SWITCH
BEFORE WORKING
ELECTRIC
ON THIS EQUIPMENT.
SHOCK
CAN KILL
POWER SOURCE
76 77
4 2 31 32 75
CV OUTPUT
TERMINALS ON
DC-250
POSITIVE
N.A.
C
B
A
32
31
2
4
GND
21
N.D.
N.B. AND N.C.
NEAR THE POWER SOURCE TERMINAL
AND LOCATED NEAR THE POWER SOURCE INPUT POWER
CLEVELAND, OHIO U.S.A.
LN-8
TO LN-8 INPUT
CABLE PLUG
N.E.
CONTROL CABLE
ELECTRODE CABLE TO
WIRE FEED UNIT
TO WORK
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