PCL-833 is a 3-axis quadrature encoder and counter add-on card for the
IBM PC/AT and compatibles (ISA bus). This card lets your PC perform
position monitoring for motion controlsystems. Each input includes a
decoding circuit for incremental quadrature encoding. Inputs accept
either single-ended or differential signals. Quadrature input works
with or withoutan index, allowing linear or rotary encoder
feedback.PCL-833 has three independent 24-bit counters. The maximum
quadrature input rate is 1.0 MHz, and the maximum input rate in counter
mode is 2.4 MHz. You can individuallyconfigure each counter for
quadrature decoding, pulse/direction counting or up/down counting.
PCL-833
provides five digital input channels. Each channel accepts digital
input as an index input for a rotary encoder or as a home sensor input
for a linear encoder. The card cangenerate an interrupt to the system
based on a signal from its digital inputs, overflow/underflow of its
counters, or on a programmed time interval. It can repeatedly generate
interruptsat any time interval you specify, from 0.1 msec. to 255 sec.
These interrupts let you precisely monitor the speed of a control
system.
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