Lincoln Electric DC-655 IM602-A - Manual (Page 39)

F-3 DIAGRAMS F-3
DC-655
A
bove diagram shows electrode connected positive
.
To change polarity
,
turn power off
, reverse the electrode and work leads at the power
NEGATIVE
POSITIVE
32 31 2 4 GND 21
N.A.
N.D.
ELECTRODE
CABLE
TO
WORK
POWER
SOURCE
Only qualified persons should install
, use or
service this machine
.
Do not operate with covers removed
.
Disconnect power source before servicing
.
Do not touch electrically live parts
.
CONTROL
BOX
21
FOR
CONTROL
CABLE
WITH
14
PIN
MS-TYPE
PLUG
CONNECTOR
OR
FOR
CONTROL
CABLE
WITH
TERMINAL
STRIP
LEAD
CONNECTORS
CONTROL
CABLE
S22
97
8
N.B.
&
N.C.
14-PIN RECEPTACLE
75 76 77
remote voltage sensing work lead may be ordered for this purpose
.
If lead #
21
is to be connected to
the terminal strip
,
connect to the #
21
terminal that matches
work polarity
.
This
connection must be changed whenever the
electrode polarity is
changed
.
N.A.
W
elding cables must be of proper capacity for the current and
duty cycle of immediate and future applications
.
C
onnect it directly to the work piece keeping it electrically
separate form the welding work lead circuit and connection
.
For
convenience
, this extended #
21
lead should be taped to the
welding work lead
. (
If the length of 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
.
N
ote
that this is not the preferred connection because it adds error N.D.
C
onnect the control cable ground lead to the frame terminal
marked near the power source terminal strip
.
The power
source grounding terminal (marked and located near the power source input power connections) must be properly connected to electrical ground per the power source operating manual
.
to the wire feeder voltmeter reading
.)
N.F.
source
.
Reverse the leads on the back of the ammeter and voltmeter
in the automatic control box
.A
lso refer to note
N.F.
TO
AUTOMATIC
E
Q
UIPMENT
TO
AUTOMATIC
CONTROL
CABLE
physically suitable for the installation
.
A
n
S16586-
[LENGTH
]
41
423
1
32
75
76
77
N.F.
21
-
21
+
REMOTE
VOLTAGE
SENSING
LEAD
N.C.
Tape up bolted connection if lead #
21
is extended
.
N.E.
If a variable voltage board is present in the automatic controls
,
the jumper lead on the
VV
board must be connected to pin "
L" to
permit the inch down button to operate
.
This jumper
, however
,
will disable the cold starting/autostop feature of the automatic
controls
, permitting only hot starting techniques to be used
.
or from
14-
pin receptacle using #
14
AWG
or larger insulated wire
N.B.
E
xtend lead #
21
from control cable with terminal strip connectors
10-30-
98F
N.G.
Illustration does not necessarily represent actual position of manual for more information
.
N.G.
CONNECTION OF NA-3, LT-5 OR LT-7 TO THE CV-655, DC-655 OR DC-600 POWER SOURCE
appropriate output studs
.
R
efer to power source operating
For proper setting of switches on power source
,
see power source operating manual
.