Lincoln Electric IM481-B manual Front View of 14-PIN Connector Receptacle, PIN LEAD NO Function

OUTPUT CONTROL “LOCAL-REMOTE” SWITCH

The Output Control toggle switch on the control panel labeled “Local-Remote” gives the operator the option of controlling the output at the machine control panel or at a remote station. For remote control, the toggle switch is set in the “Remote” position and controlled at the wire feed unit control, or by connecting a K775 control to terminals 75, 76, and 77 on the terminal strip at the front of the machine, or by connecting a K857 control with a K864 adapter to the 14-pin con- nector on the front of the machine. For control at the machine control panel (Output Voltage control dial), the toggle switch is set in the “Local” position.

(Exception: When used with an LN-9, LN-9 GMA or NA-5 wire feeder, the Output Control switch must be in the “Remote” position or automatic shutdown of the LN-9 or NA-5 may occur.)

POLARITY SELECTION

Polarity selection is made by appropriately connecting the electrode and work welding cables to either the “+” terminal or to the “-” terminal. Select “Voltmeter” switch for “+” or “-” electrode for the remote (#21) work sensing lead.

VOLTMETER SWITCH

Select “+” for positive electrode or “-” for negative electrode. This switch selects electrode polarity for the remote (#21) work sensing lead of automatic or semi- automatic equipment.

THERMAL PROTECTION LIGHT

The amber thermal protection light will be lit if either of the two protective thermostats have opened. The out- put power will be disabled but input power will still be applied to the welder.

115 VAC and 42 VAC AUXILIARY POWER AND CONTROL CONNECTIONS

14-Pin Connector

The 14-pin connector receptacle (type MS-3102A-20- 27SX) supplies auxiliary power.

42 VAC is available at receptacle pins I and K. A 10 amp circuit breaker protects this circuit.

115 VAC is available at receptacle pins A and J (except on the European model). A 10 amp circuit breaker protects this circuit. Note that the 42 VAC and 115 VAC circuits are electrically isolated from each other.

FRONT VIEW OF 14-PIN CONNECTOR

RECEPTACLE

	K= 4 2
A = 3 2	J = 3 1
B = G N D	I = 4 1

LN

	C = 2		H = 2 1
	D = 4		G = 7 5
	E = 7 7		F= 7 6
		M
PIN	LEAD NO.		FUNCTION
A	32		115 VAC (Export Model Only)
B	GND		Chassis Connection
C	2		Trigger Circuit
D	4		Trigger Circuit
E	77		Output Control
F	76		Output Control
G	75		Output Control
H	21		Work Connection
I	41		42 VAC
J	31		115 VAC (Export Model Only)
K	42		42 VAC
L	---		---
M	---		---
N	---		---

Terminal Strip Connections

Terminal strip TS2 located behind the hinged control panel on the front of the power source supplies 115 VAC. A 10 amp circuit breaker protects this circuit. This 115 VAC is also available in the 14-pin connector (except on the European model).

Terminal strip TS1 also located behind the hinged control panel allows for connecting of a K775 remote control to terminals 75, 76, and 77.

A chassis ground screw is provided below the terminal

strips marked with the symbol for connecting the automatic equipment grounding wire or remote control grounding wire.

To gain access to the terminal strips simply remove the two #10 sheet metal screws from the top of the welder nameplate. Tilt panel forward so it rests in a horizontal position. See Table above for lead number functions.

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