1‑Slot, USB CompactDAQ Chassis – The cDAQ‑9171 is a bus‑powered, CompactDAQ USB chassis designed for small, portable sensor measurement systems. The chassis provides the plug‑and‑play simplicity of USB to sensor and electrical measurements. It also controls the timing, synchronization, and data transfer between C Series I/O modules and an external host. You can use this chassis with a combination of C Series I/O modules to create a mix of analog I/O, digital I/O, and counter/timer measurements. The cDAQ‑9171 also has four 32‑bit general-purpose counters/timers that you can access through an installed, hardware‑timed digital C Series module for applications that involve quadrature encoders, PWM, event counting, pulse train generation, and period or frequency measurement.