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1. Introduction
Thank you for buying the Advantech PCI-1784. The PCI-1784 is a 4-
axis quadrature encoder and counter card for PCI bus. This card
includes four 32-bit quadruple AB phase encoder counters, 8-bit timer
with multi range time-base selector and four isolated digital input and
four isolated digital output. Its flexible interrupt sources are suitable for
motor control and position monitoring.
The following sections of this chapter will provide further information
about features of the multifunction cards, a Quick Start for installation,
together with some brief information on software and accessories for the
PCI-1784 card.
1.1 Features
❏ Four 32-bit up/down counters
❏ Single ended or differential inputs
❏ Pulse/direction and up/down counter
❏ x1, x2, x4 counts for each encoder cycle
❏ Optically isolated up to 2500 V
DC
❏ 4-stage digital filter with selectable sampling rate
❏ On board 8-bit timer with wide range time-base selector
❏ Multiple interrupt sources for precision application
❏ Four isolated digital input
❏ Four isolated digital output with flexible function
❏ Board ID
The Advantech PCI-1784 offers the following main features:
Encoder Interface
Each channel includes a decoding circuit for incremental quadrature
encoding. Inputs accept either single-ended or differential signals.
Quadrature input works with or without an index, allowing linear or
rotary encoder feedback.