Measurement Computing ADAC/5500 Series - Manual (Page 44)

ADAC Series PCI Boards 795 - 39 - ADAC/5500 Series User Manual 928
5.2.11.1 DIO0 and DIO1 - 8-bit Input/Output Ports
These signals are available at the main 68-pin I/O connector. They are accessed via the DIO0, DIO1, and
DIO_16 ports. Each 8-bit DIO0 and DIO1 port can be individually programmed as either an input or output
port. The DIO_16 port provides access to both DIO0 and DIO1 in a single 16-bit port for read and write
operations.
5.2.11.2 DIO2 and DIO3 - 16-bit Digital Input and Digital Output Ports
The two 16-bit ports on the ADAC/5501MF, ADAC/5502MF, ADAC/5503HR and ADAC/5504HR boards
are accessible through two 40-pin headers on the board. The signals on these connectors can be brought out to
the back of the PC (at the cost of a slot for each port) using an optional G17 cable. This cable is terminated
with a 37-pin D-type connector which is compatible with the ADAC line DC-37 screw terminal panel, as well
as our other ADAC line of 4000 VRMS isolated digital I/O panels.
The DIO2 and DIO3 ports can be programmed to be either an input or output port. A strobe signal is provided
in the 37 pin interface. When DIO2 or DIO3 is configured as an input port, the strobe is disabled. When DIO2
or DIO3 is configured as an output port, the strobe signal will be pulsed following each data output event.