Industrial Grade Quadrature Encoder has 32-bit PCI bus, plug and play, 6-ch 32-bit industrial counter for three kinds of differential pulse trains, including a/b phase, CW/ CCW, and pulse/ direction. The Encoder has 6-CH differential pulse generators up to 500 khz, 6-ch 32-bit position compare with interrupt function and 6-ch 16-bit ± 10 v analogue output. The Encoder has the feature of 6-ch 12-bit 133 khz analogue single-ended input and 19-ch opto-isolated di, 7-ch open collector do. The Industrial Grade Quadrature Encoder has digital I/Os and counters which are 2500 VRMS isolated.