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THEORY OF OPERATION
E-5E-5
LN-23P
FIGURE E.5 K350-1 DIAGRAM
NOTE: Unshaded areas of block logic diagrams are the subject of discussion.
K350 / K350-1ADAPTER KITS (cont.)
The wiring diagram in Figure E.5 shows the internal
connections that allow the voltage control, the welder
output (contactor) control and the Work Sense Lead
(#21) to be switched from one feeder to the other.
The Relay Board and the two relays (1CR & 2CR)
connect the feeder that has been triggered to the
power source through the control cables. See the
K350 Machine Schematic in Section G for a better
understanding of the relay logic.
The 24 volt control transformer provides power for
the Relay Board and the relays. It is also the low
voltage trigger circuit supply for the LN-23P.
The K350 is basically the same as the K350-1
except the Control Cable to the power source has
leads with terminals. (Figure E.5.a). It is designed to
be used with power sources that have a terminal
strip for the wire feeder connection rather than a 14
pin connector.
K350 Control Cable - for use with
power sources that do not have a
14 pin Amphenol connector
8 CONDUCTOR CONTROL CABLE
C(75)
B(76)
A(75)
4
31
32
2A
2B
GND
FIGURE E.5.a
M17514
12-01
1
3
4
5
6
2
6
4 2
1
5
*
RELAY P.C. BOARD
3
1CR
21
521
609
608
610
604B
607
75
B
A
608
75A
75B
4
76A
76B
602
604
75
76
77
521
602
604
75
76
77
521
602
2CR
B
A
609
521B
521A
2B
2A
31
32
4
77
76
75
21
607
606
605
A
A
A
A
A
A
A
A
A
(J)
(A)
(D)
(C)
(H)
A
A
(E)
(F)
(G)
(I)
(K)
(B)
31
32
4
2
77
76
75
GND
2B
2 1
4
7
5
8
3
6
9
4
610
3
2
1
6
5
4
789
604A
76
2A
INDICATES CONNECTOR
CAVITY NUMBER
A.N.S.I. ELECTRICAL SYMBOLS PER E1537
COLOR LEGEND
R=RED
B=BLACK
8 CONDUCTOR CONTROL CABLE
"A" WIRE FEEDER "B" WIRE FEEDER
TERMINAL STRIP
TERMINAL STRIP
24V. CONTROL TRANSFORMER
2C
21
521
R
R
B
B
606
605
ICR & 2CR - 3 PDT, 24V.D.C.
AMPHENOL
SENSE LEAD
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