The USB-QUAD08 from Measurement Computing Corp., Norton, MA, provides simultaneous input and decoding for up to 8 incremental quadrature encoders at resolutions up to 48 bits. Its 8 quadrature counters support differential and self-ended inputs and feature multiple programmable counting modes. Counters have <10 ns jitter and accept inputs up to 10 MHz. Streaming speed to the PC is software-configurable up to 8 Msps. Eight digital I/O support up to 42.4 Vpk/50 VDC with clamping diodes for CEMF suppression. Other features include frequency and pulse width measurement and internal and external triggering.
Encoder Module from Measurement Computing
Measurement Computing Corp.