48 Channel USB Digital Input/Output Module
- High-speed USB 2.0 device, USB 3.0 and 1.1 compatible
- 48 lines of digital I/O
- High retention type B USB connector
- Mini USB header connector in parallel with type B for stacking and embedded applications
- Six (6) 8-bit ports independently selectable for inputs or outputs
- All I/O lines buffered with 32 mA source, 64mA sink current capabilities
- I/O Buffers can be enabled or tri-stated under program control
- Drivers and sample application provided
- Jumper selectable I/O pulled up to 5V for contact monitoring, pulled down to ground or floating
- Jumper selectable power provided via USB cable or external power supply for higher source current capabilities
- Resettable fused +5VDC outputs per 50-pin connector
- Standard 50-pin IDC-type shrouded connectors with key
- PC/104 size (3.550 by 3.775 in.)
- Rugged industrial enclosure
- Compatible with industry standard I/O racks like Grayhill, Opto 22, Western Reserve Controls, etc.
- 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
- Board only version with no enclosure
- External power components and regulated AC/DC adapter
- Extended operating temperature (-40° to +85°C)
- DIN rail mounting provision
- Screw terminals for power input provide high retention connection
- RoHS Available. Please contact us for ordering information
This USB board is an ideal solution for adding portable, easy-to-install digital I/O capabilities to any computer with a USB port. It is a high-speed USB 2.0 device, USB 3.0 and 1.1 compatible. The board is plug-and-play allowing quick connect/disconnect whenever you need additional I/O on your USB port.
The board features 48 bits of TTL-compatible digital I/O with high-current capabilities. Each digital port can be programmed to accept inputs or to drive outputs in six 8-bit ports. Power is supplied to the card via the USB cable, or for higher source current capabilities, an external power option may be ordered. The I/O wiring connections are via two industry standard 50-pin connectors. For external circuits, fused +5VDC power is available at pin 49 of each I/O connector. The resettable fuse is rated at 0.5A.
All I/O lines are buffered by a type 74ABT543A tristate buffer transceiver capable of sourcing 32 mA or sinking 64 mA. The buffers are configured under program control for input or output. Jumper selected resistors permit configuration of each 24-bit / 50-pin connector group for pull-up (to +5 VDC), pull-down (to ground) or floating depending on the application requirement. Pull-ups are useful for contact monitoring and assure that there are no erroneous outputs at power-up until the card is initialized by system software.
The USB-DIO-48 is designed to be used in rugged industrial environments, with extended temperature available. The board is PC/104 sized (3.550 x 3.775 inches, 90mm x 96mm) for added flexibility in embedded applications and is small enough to fit nicely onto any desk or testing station.
Unlike most USB digital I/O products which primarily use a human interface device (HID) driver, ACCES providesw an easy to use, Windows/Linux-based, custom function driver capable of updating all 48-bits approximately 4000 times per second.
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 OEM (board only) version is perfect for a variety of embedded applications. What makes the OEM option unique is that its PCB size and pre-drilled mounting holes match the PC/104 form factor (without the bus connections). This ensures easy installation using standard standoffs inside most enclosures or systems. The board can be added to any PC/104, PCI-104, or PCI/104-Express stack by connecting it to a USB port usually included on-board with embedded CPU form factors such as EBX, EPIC, and PC/104. This is especially important since many newer CPU chipsets do not support ISA and have plenty of USB ports. Future stacks will be using the extremely fast PCI Express bus which is essentially overkill for simple monitoring and control. The USB-DIO-48 board can also be installed using standoffs inside other enclosures or systems. For embedded OEM type applications, an additional micro-fit USB input header is provided in parallel with the type B connector.
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 micro-fit USB input header is provided.
- Mobile Solutions
- Test Equipment
- Machine Control
- Laboratory Monitoring and Control
- Security Systems, Energy Management
- Relay Monitoring and Control
- Sensing Switch Closures or TTL, DTL, CMOS Logic
- Driving Indicator Lights or Recorders
- Industrial Automation
- Embedded OEM
The primary accessory is a direct connect 62-pin spring-cage terminal board (STB-DIO-48). Additional accessories include flat ribbon cables and DIN-rail mountable screw terminal boards for remote wiring and installation. 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 variety of embedded OEM USB cables.
Drivers and Downloads
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.
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 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.
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.
TTL Digital Input/Output Lines
- Logic High: 2.0 VDC minimum, 5.5 VDC max.
- Logic Low: -0.5 VDC min., +0.8 VDC max.
- Logic High: 2.0 VDC minimum, source 32 mA
- Logic Low: 0.55 VDC maximum, sink 64 mA
- This product is designed to be in full compliance with CE requirements.
|USB-DIO-48||48 High-Speed Digital I/O's in rugged enclosure|
|STB-DIO-48||Direct connect 62-pin spring-cage terminal board $49|
|STB-48CH||External screw terminal board for 26 to 12 AWG wire and remote wiring $149|
|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|
|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|
|STB-50||DIN-rail mountable screw terminal board for 50 pin header type connector $44|
|MP104-DIN||DIN rail mounting provision $19|
|USB-104-HUB||Rugged, industrial grade, 4-port high-speed USB 2.0 hub|
|Model Options (call for pricing)|
|-PR||+5VDC external power jack and regulated AC/DC adapter|
|-ST||External power components & screw terminals for power input (high retention)|
|-T||Extended operating temperature (-40°C to +85°C)|
|-OEM||Board only (no enclosure)|
|-RoHS||RoHS compliant version|