Acces I/O PC/104 stackable 32-Channel Analog Input Signal Conditioner & Multiplexer designed to pair with an A/D board to increase channel count and signal conditioning capabilities. Up to seven 104-AIM-32″s can be stacked per A/D board for up to 224 S.E. or 112 diff. inputs, +5VDC only operation, Precision 15VDC sensor excitation. PN 104-AIM-32