6
Manual PCIe-DIO-24HC PCI Express Digital I/O w/CTR
There are three 82C54 counter(s) that each include three 16-bit counter/timers factory
configured in an optimal mode for use as event counters, frequency output, pulse
width, and frequency measurement.
The card is 4.824 inches in length and 4.2 inches seated height. I/O wiring for this
board is via a right angle 50-pin latching male header connector. A ribbon cable can
be used to connect this card to termination panels.
I/O wiring connections 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 VCCIO (5V or 3.3V via jumper selection)
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.
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. If the
INTSEL0 jumper is installed on the EXT position, the interrupt will be generated by the
external interrupt pin on the connector. The card also generates an interrupt to the
computer on OUT2 of the first 82C54 if the IRQT jumper is installed. All interrupt
trigger sources can be individually selected through software. When triggered, an
interrupt is requested.
Figure 1-1: Block Diagram