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The Lincoln Electric M19423-1 (9SM19423-1) is a heavy-duty analog secondary power regulation printed circuit board assembly (PCBA). It functions as a linear conditioning subsystem that intercepts auxiliary AC power from primary engine-drive alternators or multi-station transformers to provide regulated DC control power. The board is designed to operate down-line components including wire feeder motors, remote control pendants, and cooling pump relays while maintaining low-noise DC output to prevent harmonic distortion in industrial welding environments.
Features
True Analog Regulation Loop: Provides millisecond-level line and load response without digital processing delay
EMI/RFI Suppression: Non-switching FET architecture ensures zero electromagnetic or radio-frequency interference
Harsh-Environment Durability: Engineered for open-air construction, offshore rigs, and foundries
OEM Drop-In Form Factor: Aligns with factory chassis standoffs, wiring harnesses, and terminal configurations
Linear Conditioning: Eliminates high-frequency harmonic distortion common in digital switching boards
Chemical Barrier: Conformal coating protects against copper dust, iron filings, salt air, and flash condensation
Specifications
Manufacturer Part Number: 9SM19423-1
OEM Part Number: M19423-1
Airgas Catalog Number: LINM19423-1
UPC/GTIN: 015082543055
Sub-Circuit Typology: Linear Analog Power Regulation with Discrete Solid-State Interfacing
Input Voltage Nominal: 24VAC, 42VAC, or 115VAC (multi-tap configuration)
Output Voltage Profile 1: +24VDC filtered loop (logic gates and relays)
Output Voltage Profile 2: 0–10VDC isolated analog command reference voltage loop
Dielectric Isolation: 1500V RMS (between high-power input and low-voltage telemetry)
Cooling: Convection cooled via aluminum alloy logic-level heat sinks
