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.

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 (64 mA optional)

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.

Available Reference Manuals

Available Software Downloads

Further information about available ACCES Software:

Drivers And Operating Systems

What drivers and other support we provide for various operating systems.

Setup Programs, Samples, And Utility Software

A description of the software package that comes with each ACCES card.

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.

Custom Software Services

A description of some of our custom software offerings. Did you know we offer free programming services to qualifying customers?