Access IOD-144 user manual Functional Description, Features, Applications

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DIGITAL INPUT/OUTPUT CARD

IOD-144

USER MANUAL

FUNCTIONAL DESCRIPTION

FEATURES

144 Channels of Digital Input/Output. All 144 I/O Lines Buffered on the Board.

Four and Eight Bit Groups Independently Selectable for I/O.

Hysteresis Correction and Pull-Down Resistors on I/O Lines.

Interrupt and Interrupt-Disable Capability.

Tri-stateable I/O ports under software control. +5V Supply Available to User.

Compatible with Industry Standard I/O Racks like Opto-22, Potter & Brumfield, etc.

APPLICATIONS

Automatic Test Systems.

Security Systems, Energy Management.

Robotics

Relay Monitoring and Control.

Parallel Data Transfer to PC.

Sensing switch closures or TTL, DTL, CMOS Logic.

Driving Indicator Lights or Recorders.

The IOD-144 board was designed for industrial applications and should be installed in a long slot of an IBM PC/XT/AT or compatible computer. Each I/O line is buffered and capable of sourcing 15mA, or sinking 24mA (64mA on request). The board contains five Programmable Peripheral Interface chips type 8255-5 (PPI) to provide computer in- terface to 144 digital I/O lines. Each PPI provides three 8-bit ports A, B, and C. Each 8-bit port can be configured to function as either inputs or output latches. Port C can also be configured as four inputs and four output latches. The I/O line buffers (74LS245) are configured automatically by hardware logic for input or output use according to the PPI 8255-5 Control Register direction software assignment.

The I/O buffers may be tristated under program control. If the BEN/TST jumper on the card is installed in the BEN position, the I/O buffers are permanently enabled allowing transparent backwards compatibility. However, if the jumper is placed in the TST position, enable/disable of the buffers is possible under software control.

Two I/O lines of each port can be used for interfacing User Interrupts to the computer. Interrupts are buffered and are enabled by jumper installation or by a combination of jumper installation and a digital input line. You can use Interrupts #2 through #7, #10 through #12, #14 and #15. Interrupts of all ports (one per port) are OR'ed together. I/O wiring connections are via 50-pin headers on the board. Six flat I/O cables connect

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Contents Digital INPUT/OUTPUT Card Model IOD-144 Digital INPUT/OUTPUT Card Table of Contents Installing the Card Applications FeaturesFunctional Description IOD-144 Block Diagram Option Selection Option Selection MAP Standard Address Assignments for PC XT Computers Address SelectionOFF Software SETUP.EXEInPortb Windows Utility DriversDigital INPUT/OUTPUT Card Port Address Selection Table ProgrammingDeveloping Your OWN Software Digital INPUT/OUTPUT Card Digital INPUT/OUTPUT Card BASEADDR=&H2D0 OUT BASEADDR+3,&H98 Programming Example=INPBASEADDR =INPBASEADDR+2/16Sample Programs Digital INPUT/OUTPUT Card Digital INPUT/OUTPUT Card Alarm TURBO-C Program Alarm Digital INPUT/OUTPUT Card =-1 Flag used to signal alarm is Sharing Interrupts on the ISA BUS Standard for accessing the IRQ line as followsConnector PIN Assignments Features SpecificationsAppendix a WarrantyPPI Data Sheets

IOD-144 specifications

Access IOD-144 is a cutting-edge device that has garnered significant attention within the field of connectivity solutions. Designed primarily for industrial applications, the IOD-144 is an Internet of Things (IoT) gateway that facilitates seamless communication between devices and applications in a robust and reliable manner. This device is particularly suited for environments that require real-time data processing and monitoring, making it an ideal choice for sectors like manufacturing, transportation, and smart cities.

One of the standout features of the Access IOD-144 is its versatility in supporting multiple connectivity options. It is equipped to handle various protocols, including Ethernet, Wi-Fi, Bluetooth, and cellular networks. This broad support ensures that users can choose the most suitable connectivity method based on their specific requirements and existing infrastructure. The device's ability to adapt to different network environments enhances its utility in diverse operational settings.

In terms of processing power, the IOD-144 prides itself on having a powerful microprocessor, allowing it to perform complex computations and data processing locally. This edge computing capability reduces latency by enabling real-time data analysis and decision-making without the need to constantly communicate with a cloud service. As a result, businesses benefit from faster response times and reduced bandwidth costs.

Moreover, the Access IOD-144 is designed with scalability in mind. It can support an extensive array of sensors and actuators, making it an ideal solution for organizations looking to expand their IoT ecosystems over time. The device can easily integrate with various third-party applications and platforms, ensuring compatibility and allowing for future growth.

Security is another key focus of the IOD-144. With built-in encryption protocols and secure authentication methods, the device helps to safeguard data transmitted across networks. This emphasis on security is crucial, particularly in industrial settings where data breaches can have severe consequences.

Additional features of the Access IOD-144 include user-friendly management software that simplifies deployment, monitoring, and maintenance of connected devices. The device also supports over-the-air firmware updates, ensuring that users can keep their systems up-to-date with the latest features and security enhancements.

In summary, the Access IOD-144 stands out due to its multifaceted connectivity options, powerful processing capabilities, scalability, robust security measures, and user-friendly management tools. These characteristics make it a leading choice for businesses looking to enhance their IoT capabilities while ensuring reliable performance in challenging environments.