National Instruments NI PCI-8254R V C

Chapter 3 Signal Connections

NI PCI-8254R User Manual 3-2 ni.com

Table3-1 summarizes the functions of the connectors on the NI 8254R

device.

Connectors

This section describes the connectors on the NI 8254R device and includes

pinouts and signal descriptions for each connector.

2-Position Isolated Outputs Power Connector

The isolated outputs power connector on the NI 8254R device

accommodates one power supply. The V terminal provides the isolated

output circuitry (5 to 30 VDC) for the NI 8254R device. The C terminal

provides the common-mode signal for the NI 8254R device.

Figure 3-1 illustrates the isolated outputs power connector on the NI8254R

device.

Figure 3-1. NI 8254R Isolated Power Connector

Table 3-1. NI 8254R Connector Functions

Peripheral Connector Function

Isolated Output Power 2-position isolated outputs

power connector Power for isolated outputs

IEEE 1394 6-pin IEEE 1394a connector Power and data connection to

IEEE 1394 cameras

Digital Input/Output 44-pin female high-density

D-SUB External TTL I/O; External

isolated I/O

Camera Power 4-pin computer power Power from PC power supply

to IEEE 1394a connector

V C

Contents

Main Page Important Information Warranty Copyright Trademarks Patents Compliance Compliance with FCC/Canada Radio Frequency Interference Regulations Determining FCC Class FCC/DOC Warnings Class A Conventions Contents Chapter 1 Introduction Chapter 2 Digital I/O Page Introduction Software Overview Vision Builder for Automated Inspection Vision Development Module IEEE 1394 and NI 8254R Functional Overview Start Conditions Acquisition Window Control Digital I/O RIO and LabVIEW FPGA TTL Inputs and Outputs Isolated Inputs and Outputs I/O for Normal Operation Trigger Inputs Timed Pulse Output Initiating a Timed Pulse Pulse Modes Pulse Delay Pulse Width Trigger Polarity Trigger Change Detectors Quadrature Encoder Product Selection Port Using ISO Input 5 as a Latch General-Purpose I/O General-Purpose Inputs General-Purpose Outputs I/O for Fault Conditions Shutdown Watchdog Timer Considerations When Connecting the Digital I/O Wiring an Isolated Input to a Sourcing Output Device Wiring an Isolated Output to an External Load Protecting Inductive Loads Transmission Line Effects Signal Connections The following diagram shows the connectors on the NI 8254R device. Connectors V C 2-Position Isolated Outputs Power Connector IEEE 1394a Connector General-Purpose Digital I/O Page Page Page Page Cabling IEEE 1394 Camera Cables I/O Terminal Block V C NI Vision I/O Terminal Block and Prototyping Accessory Power Requirements Isolated Outputs Power Connector Page A Technical Support and Professional Services Page Glossary F H I N P Q R T Page Index N P Q R S T W