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The Lincoln Electric L12400-3V1 (also 9SL12400-3V1) is an OEM solid-state microprocessor-controlled printed circuit board assembly (PCBA) for engine-driven welders. It serves as a dual-mode controller providing automatic throttle idler regulation and engine fault protection shutdown.
Features
Automatic Idler Control: Transitions engine from low idle to high operating speed upon sensing weld arc or auxiliary load
Engine Critical Shutdown: Cuts 12V DC power to fuel shutoff solenoid or ignition upon fault detection
Low oil pressure switch loop monitoring
High engine coolant temperature switch loop monitoring
Alternator stator/regulator feedback sensing
Generator auxiliary/weld arc current sensing
Dedicated gate relays for electronic idler solenoid throttle actuator
Dedicated gate relays for fuel shutoff solenoid/main ignition excitation circuits
Vibration and moisture resistant construction
Thermal cycling protection
Static-shielding packaging
Specifications
Manufacturer Part Number: L12400-3V1 / 9SL12400-3V1
