Access PCI-DIO-24D(H) - Manual (Page 6)

Manual PCI-DIO-24DH 6
I/O wiring connections for the H card are via a 50-pin connector on the back plate of the card. Flat
insulation-displacement ribbon cables can be used to connect these cards to termination panels and relay
output cards. Also, the 50-pin connection provides compatibility with OPTO-22, Gordos, Potter &
Brumfield and Western Reserve Controls module mounting racks. Fused +5 VDC power is available on
the I/O connector at pin 49. The on-board fuse is rated at 0.5A at room temperature, and can be reset by
cycling computer power, or by removing the load.
I/O wiring connections for the D card are via a 37-pin D-sub connector on the back plate of the card. A
37-pin D-sub solder cup mating connector, or flat insulation-displacement ribbon cable can be used to
connect these cards to termination panels. The "D" version has a fused 5 volts available at connector pin
20. The on-board fuse is rated at 0.5A, and can be reset the same as the H version.
The card can generate an interrupt to the computer on bit 3 of Port C if the IRQD jumper is installed and
the INTSEL0 jumper is installed in the INT position. When bit C3 goes high (edge triggering) an interrupt
is requested. For the H model card, a rising edge signal on pin 22 on the 50-pin connector can be used to
generate an interrupt if the INTSEL0 jumper is installed in the EXT position. Pin 20 on the H model card
and Pin 2 on the D model card are used to disable interrupts when set low (grounded).
Optional Counter/Timers
These cards have options to include one, two, or three 82C54 counter(s) that 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 which shows one 82C54 counter. If your card
has one or more of these optional counters, an -S01, -S02, or -S03 is appended to the model number for
one, two, or three counters respectively. For example, a 24-bit digital input/output card with a 50-pin
connector and two 82C54 counters is model H-S02.
The card can also generate an interrupt to the computer on Out2 of the first 82C54 if the IRQT jumper is
installed.
Note
If you have a model D-S03, then the fused +5V power output is not available.