USB-DIO-32

The USB-DIO-32 is an ideal solution for adding portable, easy-to-install digital I/O and counter capabilities to any computer with a USB port. The USB-DIO-32 is a USB 2.0 device, offering the highest speed available with the USB bus. It is fully compatible with both USB 1.1 and USB 2.0 ports. The unit is plug-and-play allowing quick connect or disconnect whenever you need additional I/O on your USB port.

The USB-DIO-32 features 32 bits of TTL-compatible digital I/O with high-current capabilities and three optional 82C54 counters. Each digital port can be programmed to accept inputs or to drive outputs on four 8-bit ports, designated as port A, B, C, and D. Power is supplied to the unit via the USB cable or for higher current capabilities, external power may be used. The I/O wiring connections for USB-DIO-32 are via an industry standard 50-pin connector. For external circuits, fused +5VDC power is available at the connector. This resettable fuse is rated at 0.5A.

All I/O lines are buffered by a type 74ABT245 tristate buffer transceiver capable of sinking 64 mA or sourcing 32 mA. The buffers are configured under program control for input or output. Pull-ups (to +5 VDC) or pull-downs (to ground) on the board allow for contact monitoring and assure that there are no erroneous outputs at power-up until the module is initialized by system software.

Unlike most USB digital I/O products which primarily use a human interface device (HID) driver, ACCES offers an easy to use, Windows-based, custom function driver optimized for maximum data throughput. This approach exposes the full functionality of the hardware along with maximizing the advantage of using the high-speed USB 2.0 bus.

Firmware 2.0 Features

Onboard Watchdog Timer. If your application fails to communicate with the device within a specified timeout period (up to hundreds of seconds) the onboard intelligence will change all the output ports and values to the configured "safe" state.

Need a DAC to power up at 1 Volt? Want the digital output port to generate a square wave as soon as the firmware is loaded? Now you can configure the power-on default states for all possible outputs.

Command the onboard intelligence to perform digital input debouncing and latching. Debouncing time constants from hundreds of microseconds to hundreds of milliseconds allows a wide variety of low-pass filtering options. Latching inputs record low- and high-going pulses that your application may otherwise have missed.

PWM allows programmable duty-cycle square wave output on any digital output. MAP is our new Matrix Mapping feature, wherein you can command the onboard intelligence to automagically copy the state of one bit onto another bit, with no computer interaction required.

OEM USB/104 FORM FACTOR

The USB-DIO-32 is designed to be used in rugged industrial environments but is small enough to fit nicely onto any desk or testing station. The board is PC/104 sized (3.550 by 3.775 inches) and ships inside a steel powder-coated enclosure with an anti-skid bottom. The OEM (board only) version is perfect for a variety of embedded applications. The board features pre-drilled mounting holes and can be installed using standoffs inside most enclosures or systems. PC/104 systems can easily add this module to an existing stack using the conveniently sized PC/104 mounting holes.

High Retention USB Connector

The ever-growing presence of USB in the industrial/military marketplace has driven the need for USB connections to be reliable, dependable, and unfailing. Gone are the days of loose USB connections. A type B USB connector is used on all ACCES USB/104 products which features a high retention design that complies with the class 1, Div II minimum withdrawal requirement of over 3 pounds of force (15 Newtons). This connector has an orange color-coded insulator to quickly differentiate it from standard USB connectors. Using these USB connectors increases reliability in your system and ensures a tight connection. For embedded OEM type applications, an additional miniature USB input header is provided in parallel with the type B connector.

Applications

• Home
• Portable
• Laptop
• Education
• Laboratory
• Industrial Automation
• Embedded OEM

COUNTER/TIMERS

Three 82C54 chips each include three 16-bit counter/timers factory configured in an optimal module for use as event counters, frequency output, pulse width, and frequency measurement (see the Block Diagram).

ACCESSORIES

The USB-DIO-32 is available with optional cable assemblies, DIN-rail mountable screw terminal boards, and an external AC/DC power supply. The pin connections are also compatible with industry standard I/O racks such as ACCES A24A, Grayhill, Opto 22, Western Reserve Controls, etc. with optional cable. Also available is our low cost IIB-24 which will add optical isolation to any standard 24-channel digital I/O port on a 50 pin connector. To make use of the miniature embedded USB header connector, we offer a type A to micro-fit USB input header cable.

SOFTWARE

The USB-DIO-32 includes a free Windows XP -> 10, both 32 & 64 bit compatible software package. This contains sample programs and source code in Visual Basic, Delphi, and Visual C++ for Windows. Also incorporated is a graphical setup program in Windows. Third party support includes a Windows standard dll interface usable from the most popular application programs.

Drivers and Downloads

Full list of available Downloads: Software Packages, Drivers, Manuals, and other documents

Information about our Free Software packages:

ACCES is proud to provide a full suite of software support with every Data Acquisition product. We are committed to supporting the most popular operating systems and platforms for our customers. Currently we are actively supporting XP -> 10, both 32 & 64 bit, including "Server 2008," "Embedded," and "Compact" flavors for all plug-and-play products including PCI, PCI Express, USB, and more. Many products continue to ship with support for additional operating systems such as DOS, Windows 95, 98, Me, NT4, and 2000.

Samples

Among the software we deliver with our products are sample programs in a wide variety of programming languages. These samples are used to demonstrate the software interfaces to our products — and many can be used as-is in your production environments, or to test functionality of the devices out-of-the-box. We're currently actively supporting sample programs in Microsoft Visual C#, Visual Basic, Delphi, and Visual C/C++, with many devices including samples in Borland C/C++ 3.1 for DOS. Additionally we provide National Instruments LabVIEW compatible DLLs and many demonstration VIs for our devices.

Drivers

Drivers for various operating systems are also provided, including active support for Windows XP -> 10 — all in both 32-bit and 64-bit flavors, and including consumer, server, and embedded varieties — as well as the 2.6 and newer Linux kernels and recent OSX / macOS versions. Many products continue to ship with driver support for Windows 95, 98, Me, NT4, and Windows 2000, but support for these operating systems is considered deprecated.

Setup Programs and Utilites

Our Data Acquisition devices also include a graphical setup utility that walks you through the process of configuring any option jumpers or switches on the device, as well as explaining a little about the various connectors present.

Many devices also include utility programs - little tools to make your use of the device easier, such as EWriter, a program that allows you to read and write data in the user-accessible EEPROM locations on all our USB data acquisitition products; or WinRISC, a "Really Incredibly Simple Communications" terminal program that lets you get started instantly with serial devices.

"Register Level" Documentation

Besides all this software in all these languages and operating systems ACCES has a policy of open and transparent development: none of our lowest-level "register" interfaces are hidden from you — we document every register in every bus card, every command in every serial board, and every usb control transfer in every USB Data Acquisition board. These lowest-level interfaces allow you to develop for our products in ANY operating system or language, regardless of our actively supporting it or having a driver for it. We have customers actively developing in ADA, Android, Python, Java, MATLAB, Solaris, and more, just by referring to our complete low-level interface documentation! And we provide the full source code to all of our drivers, regardless of operating system, to give you an even bigger head start in your own development tasks.

No Fees or Royalties

All of this software is provided at no additional charge, and is licensed under any of a variety of flexible — and royalty free — options. Check out our software license explanation if you'd like more information..

USB and Performance

Our USB Data Acquisition products use our "AIOUSB" driver package in Windows and Linux. This driver package includes 32-bit and 64-bit support, and consists of low-level driver components and a high-level API library. This custom interface driver enables our USB devices to achieve 4000 transactions per second, compared to the competitions' "HID" drivers that cap out around 50 transactions per second. You can read all about the API in the USB Software Reference Manual linked below, and included in every applicable Software Package. (The Linux version of the AIOUSB API is almost identical to the Windows API, and is documented in the aiousb.html file included in the Linux software package.) Like all of our software, full source code is always provided.

Custom Software

ACCES also offers Custom Software Services for our products. Our prices are unbelievably low, often as inexpensive as free! If you need something tweaked to support your needs, or an entire enterprise application developed from scratch, it is definitely worth your time to inquire with us, first.

Further information about available ACCES Software:

Redistributing Windows Drivers

A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.

Specifications

Digital Inputs (TTL Compatible)

• Logic High: 2.0 to 5.0 VDC
• Logic Low: -0.5 to +0.8 VDC

Digital Outputs

• Logic High: 2.0 VDC min., source 32 mA
• Logic Low: 0.55 VDC max., sink 64 mA

Optional Counter/Timers

• Type: 82C54-10 programmable interval counters
• Output Drive:
  • 2.0 VDC min., source 32 mA
  • 0.55 VDC max,. sink 64 mA
• Input Gate: TTL/CMOS compatible
• Clock: On-board, 3 MHz crystal-controlled clock
• Active Count Edge: Negative Edge
• Minimum Clock Pulse Width: 30 nS high, 40 nS low
• Timer Range: 16 bits
• Maximum Input Frequency: 10MHz

Environmental

• Operating Temperature Range: 0° to 70°C
• Storage Temperature Range: -40° to +85°C
• Humidity: Maximum 90% RH, without condensation
• Board Dimension: 3.550 x 3.775 inches
• Box Dimension: 4.00 x 4.00 x 1.25 inches

Power

• +5VDC provided via USB cable up to 500mA**
• Basic Unit with Three Counters: 80mA typical (no load)

**optional external power supply can be ordered if the SOURCE current from the USB-DIO-32 is expected to be greater than 420mA (80mA + 420mA = ~500mA)

Connector Pin Assignments

USB-DIO-32 has a 50-pin connector provided for I/O connections. Connector pin assignments are listed below.

Assignment		Pin	Assignment		Pin
Port C	PC7	1	Counter A0 Freq In		2
Port C	PC6	3	Ctr A1 P.W.I. (Gate)		4
Port C	PC5	5	Counter A2 Freq Out		6
Port C	PC4	7	Counter B0 Freq In		8
Port C	PC3	9	Ctr B1 P.W.I. (Gate)		10
Port C	PC2	11	Counter B2 Freq Out		12
Port C	PC1	13	Counter C0 Freq In		14
Port C	PC0	15	Ctr C1 P.W.I. (Gate)		16
Port B	PB7	17	Ctr C2 Freq Out		18
Port B	PB6	19	Port D	PD7	20
Port B	PB5	21	Port D	PD6	22
Port B	PB4	23	Ground		24
Port B	PB3	25	Port D	PD5	26
Port B	PB2	27	Ground		28
Port B	PB1	29	Port D	PD4	30
Port B	PB0	31	Ground		32
Port A	PA7	33	Port D	PD3	34
Port A	PA6	35	Ground		36
Port A	PA5	37	Port D	PD2	38
Port A	PA4	39	Ground		40
Port A	PA3	41	Port D	PD1	42
Port A	PA2	43	Ground		44
Port A	PA1	45	Port D	PD0	46
Port A	PA0	47	Ground		48
Fused +5 VDC	.	49	Ground		50

Regulatory Compliance

• This product is designed to be in full compliance with CE requirements.