32-Channel, USB Digital Input/Output Module
- Small (3.5 by 3.7 in.), portable, 32-channel USB digital I/O module
- Four 8-bit ports independently selectable for inputs or outputs
- High-Speed USB 2.0 device, USB 3.0 compatible
- All 32 I/O lines buffered with Sink 64mA / Source 32mA current capabilities
- Standard 50-pin IDC connector with key
- Removable screw terminal adaptor for easy wiring
- USB/104 form-factor for OEM embedded applications
- OEM version (board only) features PC/104 module size and mounting compatibility
- Alternate micro-fit embedded USB header connector
- Custom high-speed function driver (non-HID)
- Type B USB connector features industrial strength and high-retention design
- Small (4" x 4" x1.25") rugged industrial enclosure
- Labview VI driver
- Now with Firmware 2.0 features!
- Onboard Watchdog Timer, configurable power-on defaults, digital input debouncing and latching, digital output Pulse Width Modulation (PWM) and Matrix Mapping
- Three 82C54 counter/timers
- Extended operating temperature (-40° to +85°C)
- External power components and AC/DC adapter
- Screw terminals for power input provide high retention connection
- OEM (board only) version with PC/104 mounting holes and PCB footprint for added flexibility in embedded applications
- 24-channel version compatible with industry standard I/O racks like Grayhill, Opto 22, Western Reserve Controls
- RoHS Available. Please contact us for ordering information
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.
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.
- Industrial Automation
- Embedded OEM
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).
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.
The USB-DIO-32 includes a free Windows 98se/Me/NT/2000/XP/2003 compatible software package. This contains sample programs and source code in Visual Basic, Delphi, C++ Builder, 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.
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 Windows XP through Windows 7, including "Server," "Embedded," and "Compact" flavors in both 32-bit and 64-bit 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.
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 for various operating systems are also provided, including active support for Windows 7, Vista, and XP — all in both 32-bit and 64-bit flavors, and including consumer, server, and embedded varieties — as well as the 2.6 Linux kernel and recent OSX 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.
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.
Available Reference Manuals
Available Software Downloads
- View / Download the USB-DIO-32 Data Sheet (.PDF)
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.
Digital Inputs (TTL Compatible)
- Logic High: 2.0 to 5.0 VDC
- Logic Low: -0.5 to +0.8 VDC
- Logic High: 2.0 VDC min., source 32 mA
- Logic Low: 0.55 VDC max., sink 64 mA
- 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
- 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
- +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
- This product is designed to be in full compliance with CE requirements.
|USB-DIO-32||32-channel digital I/O module integrated in rugged enclosure with screw terminal board|
|USB-DIO-32-E||Economy module, no screw terminal board|
|USB-DIO-32-OEM||Board only model, no enclosure or screw terminal board|
|STB-50U||Spring-cage terminal board for 50-pin mating connector. $49|
|STB-50U Kit||Spring-cage terminal board kit used for mounting the STB-50U to the enclosure of the USB-DIO-32. Includes STB-50U, cable and specialized mounting hardware. $69|
|UTBK-50||Direct connect 50-pin removable screw terminal board $49|
|STB-50||DIN-rail mountable screw terminal board with latches for 50-pin header $44|
|MP104-DIN||DIN-rail mounting provision $19|
|CAB50F-6||50-pin ribbon cable with female header connectors, 6 feet long $30|
|CAB50-6||Ribbon cable with 50-pin female edge connector on one end and 50-pin female connector on the other end $30|
|C104-50F-12||50-pin ribbon cable with female headers, 12" long $15|
|IIB-24||24-channel optical isolator board for each 50-pin header $149|
|ROB-24||24-channel electromechanical relay board for each 50-pin header $249|
|A24A||24-channel mounting card for solid state I/O modules, 50-pin edge connector $149|
|CUSB-EMB-1||1ft USB Type A to micro-fit OEM header $19|
|CUSB-EMB-6||6ft USB Type A to micro-fit OEM header $19|
|CUSB-EMB-HDR||30" USB 1x5 standard header to micro OEM cable $19|
|CUSB-EMB-HDRM||30" USB 1x5 metric header to micro OEM cable $19|
|CUSB-EMB||6" micro-fit to micro-fit embedded OEM cable $19|
|USB-104-HUB||Rugged, industrial grade, 4-port high-speed USB 2.0 hub|
|Options (call for pricing)|
|-E||Economy module, no screw terminal board|
|-OEM||Board only model, no enclosure or screw terminal board|
|-Cx (where x = 1, 2, or 3)||Optional counters on board|
|-P||External power components and AC/DC adapter|
|-ST||External power components & screw terminals for power input (high retention)|
|-T||Extended operating temperature (-40°C to +85°C)|
|-Call||24-channel version compatible with industry standard solid state module racks|
|-RoHS||RoHS compliant version|