NATIONAL INSTRUMENTS NI 9425 is C Series 32-channel sinking digital input module for CompactRIO/CompactDAQ. It supports 12/24V industrial logic, 7μs update rate and 60VDC channel-earth isolation, available with D-SUB or spring terminals, IP40 rating and -40~70℃ wide temperature range. It reads signals from limit switches and safety interlocks, can be conformal coated for harsh environments. Widely used for automated test benches and machine safety signal acquisition, ideal spare part for NI CompactRIO discrete input system retrofit and maintenance.