National Instruments NI PCI-8254R IEEE 1394a Connector, General-Purpose Digital I/O

Chapter 3 Signal Connections

Table3-2 summarizes the functions of the power connector terminals.

IEEE 1394a Connector

The IEEE 1394a connectors on the NI 8254R device provide a reliable,

high-frequency connection between the NI 8254R device and up to

two D CAM-compliant IEEE 1394 cameras. To access the IEEE 1394a

connectors on the NI 8254R device, use any standard 6-pin IEEE 1394

cable.

Note You can use a 4-pin to 6-pin converter cable with cameras that have their own

external power supply and do not require power from the IEEE 1394 bus.

General-Purpose Digital I/O

The 44-pin D-SUB connector provides access to the general-purpose

digital inputs and outputs. The general-purpose digital I/O available on this

connector includes 2 TTL inputs, 9 TTL outputs, 13 isolated inputs, and

4 isolated outputs. For easy connection to the digital I/O connector, use the

National Instruments digital I/O cable and the NI Vision I/O Terminal

Block and Prototyping Accessory.

Note The accessories available for use with the NI 8254R do not provide access to all

available I/O on the NI 8254R device. To access this I/O, you can create a custom cable

using a standard male 44-pin D-SUB connector.

For more information about the National Instruments digital I/O cable and

terminal block, refer to the Optional Equipment section of the

NIPCI-82 54R Quick Start Guide.

Note Isolated inputs are compatible with 5 V logic if the external circuit meets the voltage

and current requirements listed in the Specifications section of the NI PCI-8254R Quick

Start Guide.

Table 3-2. Power Connector Terminals

Terminal Description

VIsolated power (5 to 30 VDC)

CIsolated common-mode signal