Digital I/O card P104-DIO-48S

TTLPCIPC/104-plus

-PC/104-Plus (PCI-104 Optional) -48 or 96 Channel TTL-DTL high speed digital I/O -Software selectable in vs. out as 8 bit and 4 bit ports -Emulates 4 industry standard 8255 PPIs (mode 0) -Full 32-bit PCI interface design -Buffered circuits for higher driving capacity -Low CPU overhead -Known power-up states -Output port status read back -Standard 50-pin IDC connectors (x4) -0 to +70° C and -40 to +85° C versions available -RoHS Available. Please contact us for ordering information -Designed, made, supported, and manufactured in the USA PC/104-Plus or PCI-104 48 and 96-Channel Digital I/O with Change-of-State Each I/O line of this card is buffered and capable of sourcing 32mA, or sinking 64mA. The board simulates Programmable Peripheral Interface chips (PPI) to provide a computer interface to digital I/O lines. Each PPI supports two 8-bit ports (A, B) and two 4-bit ports (Chi, Clow). Each port can be configured to function as either input or output latches. The I/O line buffers (types 74ABT240 and 74ABT245) are configured automatically by hardware logic for input or output according to the PPI Control Register direction software assignment. Outputs of the I/O buffers are pulled up through 10KO resistors to +5VDC. I/O wiring connections are via 50-pin headers on the board. This provides compatibility with OPTO-22, Gordos, Potter & Brumfield, Western Reserve Controls, etc. module mounting racks. Every second conductor of the flat cables is grounded to minimize crosstalk between signals. If needed for external circuits, +5VDC power is available on each I/O connector at pin 49.