The 48J/48JS cards use a 68-pin SCSI-type connector, while the 48H/48HS cards use a 100-pin SCSI-type connector. The 48JP/48JPS cards use a 68-pin SCSI-type connector which is pin-in-socket, and has jack-screws provided as a means to retain the mating cable. The 48JPL/48JPLS cards use the 68-pin SCSI-type pin-in-socket connectors; however one-touch latches are used instead of jack screws. The 48/48S cards use 50-pin headers on the face of the board, as well as the 24S card which is simply a depopulated 48S card.

The cards contain two Programmable Peripheral Interface chips type 8255-5 (PPI) to provide computer interface to the 48 I/O lines. Each PPI provides three 8-bit ports A, B and C. Each 8-bit port can be software configured to function as either inputs or latched outputs. Port C can also be configured with four inputs and four output latches.

Each I/O line is buffered and capable of sourcing 15 mA or sinking 24 mA (64 mA on request). Tristate I/O line buffers are configured automatically by the hardware logic for input or output use according to a direction control signal from the control register in the PPI. Pull-ups on the card assure that there are no erroneous outputs at power up until the card is initialized by system software.

These cards use one address space, and occupy 16 consecutive register locations. When the card is first installed, Windows will detect it as new hardware and assign it an IRQ number and base address. There are no switches to set or base addresses to assign, making it easy to use. You cannot set or change the card's base address, you can only determine what the system has assigned. The PCI Bus supports 64K of I/O address space so your card’s address may be located anywhere in the 0000 to FFFF range.

INTERRUPTS

The C3 bit on either 24-bit port can be used as an external interrupt to the computer if interrupt enable (IEN) jumpers are installed. When C3 is level triggered, an interrupt is requested. Interrupts from the two ports are OR'ed together with any change-of-state interrupt. The interrupts are assigned by the system.

ACCESSORIES

Available accessories include a wide variety of cables and screw terminal boards for quick and easy connectivity.

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 Windows XP through Windows 10, including "Server 2008," "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.

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 Visual C# and Delphi with many devices including samples in Visual Basic and Visual C/C++, as well as Borland C/C++ 3.1 for DOS. Additionally we provide National Instruments LabVIEW compatible DLLs and demonstration VIs for many of 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 Linux kernels 2.6 and newer and recent 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 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.

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
• Input Load (Hi): 20 uA
• Input Load (Lo): -200 uA

Digital Outputs

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

Power Output

• +5 VDC from computer bus (ext. 1A fast-blow fuse recommended)

Power Required

• +5 VDC at 200 mA typical

Size

• 6.9" (175 mm) long

Environmental

• Operating Temperature: 0^o to 60^o C
• Storage Temperature: -50^o to +120^o C
• Humidity: 0 to 90% RH, non-condensing

Regulatory Compliance

• This product is in full compliance with CE requirements.