CHAPTER 1
INTRODUCTION
1.1 GENERAL DESCRIPTION
The AR-B2201 card is an inexpensive 64 channel TTL digital
input/output interface card for IBM PC/XT/AT personal
computers and their compatibles. The AR-B2201 can be used in
various applications including: industrial monitoring /
control, switch sensing and interface with parallel I/O
devices.
The AR-B2201 is designed to access or control the I/O device
through eight consecutive I/O ports in the PC. Each port of
the AR-B2201 can be configured as an input or output port by
removing or installing the output driver devices.
The AR-B2201 uses high speed CMOS devices to improve noise
immunity and reduce power consumption. If the I/O port is
defined as an input port, each input line is pulled up by a
4.7K Ohm resistor. If an I/O port is defined as an output
port, the output status can be read back by reading the same
address for verification.
All of the input buffer and output driver components are
installed on IC sockets for easy maintenance and
replacement.
1.2 FEATURES
(1) 64 TTL digital I/O channels
(2) Output status read back
(3) High output driving capacity
(4) Low input loading
(4) High noise immunity
(5) Easy to use
1.3 ORDERING INFORMATION
The following lists and describes part numbers for the AR-
B2001 boards and its accessories.
Part Number
Description
AR-B2201
64 channels TTL digital
input/output card with user’s
manual
AR-B9006
34-pin screw terminal, board
for AR-B2201 with 0.6 m flat
cable ( 1m & 2m option)
