National Instruments NI PCI-8254R V C

Chapter 3 Signal Connections

© National Instruments Corporation 3-9 NI PCI-8254R User Manual

I/O Terminal Block

National Instruments provides an I/O terminal block with the NI 8254R,

which can be mounted either horizontally or vertically. The I/O terminal

block breaks the signals out into easy-to-use screw terminals and comes

with a cable that connects directly to the 44-pin D-SUB connector on the

NI 8254R.

Note TRIG 0, TRIG 1, and TRIG 2 signals are not accessible via the standard 44 to 37-pin

cable and I/O terminal block.

NI Vision I/O Terminal Block and Prototyping Accessory

Use the NI Vision I/O Terminal Block and Prototyping Accessory to

troubleshoot and prototype digital I/O applications for the NI 8254R, the

NI8 255R, and the CVS-1450 Series Compact Vision System. The

NIV ision I/O Terminal Block and Prototyping Accessory provides screw

terminals for easy connections and LEDs for each signal.

Note TRIG 0, TRIG 1, and TRIG 2 signals are not accessible via the standard 44 to 37-pin

cable and NI Vision I/O Terminal Block and Prototyping Accessory.

Power Requirements

This section describes the power requirements of the NI 8254R.

Isolated Outputs Power Connector

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

NI8 254R.

Figure 3-3. NI 8254R Isolated Power Connector

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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