Housed in 4 x 4 x 1.25 in. steel enclosure, Model USB-DIO24-CTR6 adds portable, industrial strength digital I/O and counter capabilities to any PC or embedded system with USB port. Unit features 24 lines of CMOS/LVTTL high-current digital I/O with 2 fully undedicated 82C54’s, yielding 6 counter/timers and access to input, gate, and output pins. Micro-fit USB header connector is provided in parallel with high retention type B connector and can be used for stacking and embedded OEM applications.