# Measurement Computing PCI-PDISO8 Digital Input

PCI-PDISO8 Digital Input block

## Library

Simulink® Real-Time™ Library for Measurement Computing™

## Scaling Input to Output

I/O Module Input

Block Output Data Type

Scaling

OPTO

Double

Low (opto off) = 0.0
High (opto on) = 1.0

The input is rectified before being applied to the opto isolator on the input. Without an additional input current limiting resistor, the opto turns on when $|{V}_{in}|>3$ volts.

## Block Parameters

Channel vector

Enter numbers between 1 and 8 to select the digital input lines used with this port. This driver allows the selection of individual digital input lines in arbitrary order. The number of elements defines the number of digital lines used.

For example, to use all of the digital inputs, enter

`[1,2,3,4,5,6,7,8] `

Number the lines beginning with 1 even if this board manufacturer numbers the lines beginning with 0.

Filter vector

This vector controls the 5 ms noise filter. It is the same length as the channel vector. A value of 1 turns the filter on, and a value of 0 turns the filter off. If you specify a scalar, this value is replicated across the channel vector.

Port

From the list choose `A` because this board only has eight channels.

Sample time

Enter the base sample time or a multiple of the base sample time (`-1` means sample time is inherited).

PCI slot (-1:autosearch)

If only one board of this type is in the target computer, enter `-1` to locate the board.

If two or more boards of this type are in the target computer, enter the bus number and the PCI slot number of the board associated with this driver block. Use the format `[BusNumber,SlotNumber]`.

To determine the bus number and the PCI slot number, type:

```tg = slrt; getPCIInfo(tg, 'installed')```