Ingersoll Rand 39875331 Membrane Keypad Controller Panel

The 39875331 membrane keypad controller panel serves as the primary operator interface for Ingersoll Rand Intellisys SG series air compressor control systems. This component integrates the tactile membrane switch overlay with the underlying decal display for system monitoring and parameter adjustment. Electrical ratings specify a 120VAC input supply with Triac outputs (TX1 through TX8) rated at 120V for driving external loads such as solenoid valves and starter coils. The assembly is designed as a direct replacement for the OEM controller interface on compatible Ingersoll Rand rotary screw compressors, including the SSR 50-450 HP range. Cross-referenced part numbers include 39875158 and E66268.