Lincoln Electric NA-5N Service Manual page 14

A-7
The "F" models do not include the 4 ft (1.2
m) lengths of electrode cable as standard.
If you are not using a K335 or K338 exten-
sion cable for the NA-5NF or NA-5SF, order
an appropriate length of the needed elec-
trode cable. Connect it between the wire
contact assembly and the control cable
assembly as described above.
POWER SUPPLY TO CONTROL
BOX CONNECTIONS
At the NA-5 control box, in order to activate
the NA-5 weld current sensing switch, the
electrode cables of the control cable
assembly must be placed under the clamp
bar on the left-hand side of the control box,
as shown in Figure A.6. This is required
for proper operation of the reed switch.
The nuts holding the clamp bar in place
need only to be pulled up snug. Do not
overtighten. If a carriage is used, the
electrode cables should also be clamped
to it with the cable clamp supplied on the
carriage. Do not clamp the control cable
under the travel carriage clamp but route it
over its top.
FIGURE A.6 – CONTROL BOX
ELECTRICAL CONNECTIONS.
FROM
POWER
SOURCE
INSTALLATION
CLAMP
BAR
TO
WELDING
HEAD
NA-5
Insert the polarized connector of the K215
or K597* control cable into the matching
receptacle on the side of the control box.
With the power source off, connect the
control cable assembly to the power
source as follows:
1. If using the multi-process power
source (SAM, SA-800, SAF-600,
DC-400, DC-600, DC-1000, or DC-
1500 types), be sure it is properly set
for the welding process being used
per the connection diagram (Figures
A.8 to A.14).
2. Connect the K215 control cable
leads to the power source terminal
strip exactly as specified on the
connection diagram.* Include all
jumpers on the terminal strips as
shown on the diagram. Do not put
on any other jumpers. If currents or
duty cycles higher than 1000 amps
at 80% duty cycle will be used, add
additional electrode cables to the
K215 assembly per Table A.1.
3 Depending on the power source and
the process to be used, the jumpers
on the NA-5 voltage board may have
to be changed. As shipped, the
NA-5 is connected for use with the
DC-400, DC-600, DC-1000, and
DC-1500 type power sources. For
other power sources, refer to the
appropriate connection diagram and
to IM305 Sec. T3.6.
4. Connect work leads of sufficient size
and length per Table A.1. between
the "To Work" stud on the power
source and the work. Be sure the
connection to the work makes a tight
and clean metal-to-metal contact.
*The K597 cable assembly has a 14-pin MS-type
connector for use with later model Lincoln CV power
sources.
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