Lincoln Electric IM904 manual LN-742 or STT-10 Wire Feeder Connection Instructions

C-2 ACCESSORIES C-2

LN-742 or STT-10 WIRE FEEDER CONNECTION INSTRUCTIONS

The LN-742 or STT-10 is the recommended wire feed- er for use with the INVERTEC STT II (CE). Refer to the LN-742 or STT-10 Operator Manual for Wire Feed Operation. Refer to Figure C.2 or C.3 and follow the instructions below to connect the LN-742 or STT-10.

WARNING

ELECTRIC SHOCK can kill.

•Only qualified personnel should perform this installation.

•Turn the input power OFF at the discon- nect switch or fuse box before connecting the wire feeder

1.Turn the INVERTEC STT II (CE) power off.

2.Connect the ARC SENSE LEAD MS connector to the mating connector on STT II front panel.

3.Connect the electrode lead (Twist-Mate) to (+) out- put terminal on STT II.

4.Connect the other end of electrode lead (Step #3) and the ARC SENSE LEAD (lead with ring lug, step #2) together to the gun block on the LN 742.

5.Connect work lead between STT (-) terminal and the work piece.

6.Connect the ARC SENSE LEAD “WORK” (lead with alligator clip) to work piece.

NOTE: For best welding performance make this connection as close as possible to the welding arc.

7.Connect the wire feeder control cable between the LN-742 or STT-10 and the 14-pin Wire Feeder Receptacle on the STT II. For the STT-10 Wire Feeder: Connect the second wire feeder control cable between the STT-10 and the 10-pin Remote Receptacle on the STT II.

REMOTE RECEPTACLE

WORK LEAD

WORK

WARNING	Turn off input power to the Welding
	Power source using the disconnnect
	switch at the fuse box before
	connecting the wire feeder.
ELECTRIC	Only qualified persons should install,
SHOCK	use or service this machine.
CAN KILL

CONTROL, ELECTRODE, ARC SENSE "ELECT"	WIRE FEEDER
	LN 742
AND ARC SENSE "WORK" CABLES SHOULD
	LN7 GMA
BE TAPED TOGETHER.
	LN9 GMA
	NA5R
	NA5
WIRE FEEDER
CONTROL CABLE
ELECTRODE LEAD

ARC SENSE LEAD 'ELECT"

CONNECT ELECTRODE LEAD AND "ELECT"

ARC SENSE LEAD TOGETHER TO ELECTRODE

TERMINAL OF WIRE FEEDER.

ARC SENSE LEAD "WORK" (SHOULD BE LOCATED AS CLOSE AS POSSIBLE TO THE WELDING ARC.)

CRM after 6-10-96

M17657

FIGURE C.2 LN-742 to STT II CONNECTION

INVERTEC STT II (CE)