National Instruments NI CVS-1450 Series Typical System Setup

Chapter 4 Digital I/O Functionality

© National Instruments Corporation 4-15 NI CVS-1450 Series User Manual

Figure 4-8. Example Connections

When connecting to TTL inputs on the CVS-1450 device, match the output

impedance of the transmitting device to the characteristic impedance of the

cable. For example, if the cable characteristic impedance is 118 Ω, make

Rs equal to 118 Ω, as shown in Figure 4-8.

Typical System Setup

Digital I/O configuration varies depending on the number of cameras your

system setup requires. You can access the digital I/O through the 44-pin

DSUB connector or through the threeSMB connectors.

The digital I/O capabilities of the SMB connectors on the CVS-1450 device

are ideal for typical single-camera applications. The SMB connectors are

labeled TRIG 0, TRIG 1, and TRIG 2.

TTL OUT(0) Receiving

Equipment

TTL IN(0)

118 Ω

44-Pin

DSUB

3

2

16

17

62 kΩ

Transmitting

Equipment

RS

TRIG 1 75 Ω

TRIG 1

SMB

RG-179

Coaxial Cable

+5 V

CVS-1450 device

Receiving

Equipment

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 NI CVS-1450 Series Overview Chapter 2 Setup and Configuration Chapter 3 LEDs, DIP Switches, and Connectors Chapter 4 Digital I/O Functionality Page NI CVS-1450 Series Overview About the NI CVS-1450 Series Hardware Overview Figure1-1 shows the CVS-1450 Series front panel. Figure 1-1. CVS-1450 Series Front Panel Available Camera Bandwidth Software Overview NI-IMAQ for IEEE 1394 Cameras Driver Software National Instruments Application Software Vision Builder for Automated Inspection LabVIEW Real-Time Module with the Vision Development Module Page Setup and Configuration Required Items Hardware Software Accessories Hardware Documentation Safety Information Page Setup Overview Before Getting Started: Connecting the CVS-1450 Device to a Network Subnet Considerations Setting Up the Hardware Connecting a Camera and Monitor to the CVS-1450 Device Wiring Power to the CVS-1450 Device Connecting to a Separate Main Supply Page Connecting the CVS-1450 Device to the Development Computer Vision Builder AI: Setting up the Development Computer Installing Vision Builder AI and NI-IMAQ for IEEE 1394 Cameras Configuring the IP Address on the CVS-1450 Device Acquiring an Image in Vision Builder AI LabVIEW Real-Time Module with the Vision Development Module: Setting up the Development Computer Configuring the IP Address using the LabVIEW Real-Time Module Downloading Software onto the CVS-1450 Device Acquiring an Image Using the LabVIEW Real-Time Module Page LEDs, DIP Switches, and Connectors LED Indicators POWER OK LED STATUS LED ACT/LINK LED 100 Mbps LED DIP Switches SAFE MODE Switch IP RESET Switch NO APP Switch USER 1 Switch (LabVIEW Real-Time Module Users) Connectors Power Connector Earth Ground Connection IEEE 1394 VGA Page COM1 Ethernet TRIG 0 TRIG 1 and TRIG 2 General-Purpose Digital I/O Page Page Page Page Digital I/O Functionality Overview TTL and Isolated Inputs and Outputs TTL Inputs and Outputs Isolated Inputs and Outputs Table4-2 summarizes the isolated inputs and outputs available on the CVS-1450 device. I/O for Normal Operation Trigger Inputs Timed Pulse Output Initiating a Timed Pulse Pulse Modes Pulse Delay Pulse Width Trigger Polarity 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 Disabling Shutdown Mode Watchdog Timer Overheat 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 Typical System Setup Page Deployment Connecting Multiple CVS-1450 Devices Page Page A Troubleshooting Software Configuration Problems CVS-1450 Device Does Not Appear in MAX or in Vision Builder AI Error When Configuring IP Settings for the CVS-1450 Device Status of CVS-1450 Device in MAX and Vision Builder AI is No Software Installed No Camera Found Formatting the CVS-1450 Device Compact Flash Memory Hardware Errors POWER OK LED is Red Cannot Drive Isolated Outputs Runaway Startup Application System Displays a Missing Operating System Error at Startup LED Error Indications POWER OK LED Is Not Lit When the CVS-1450 Device is Powered On B Specifications Power Requirements Memory Processor Network TTL Inputs and Outputs TTL Inputs TTL Outputs Optically Isolated Inputs and Outputs Isolated (Current Sinking) Inputs Isolated (Current Sourcing) Outputs IEEE 1394 Physical Characteristics Environmental Safety Electromagnetic Compatibility CE Compliance C Mounting Information Mounting the CVS-1450 Series Page Page Page D Technical Support and Professional Services Page Glossary B D E F Page Page Index Numerics A B C E F G H I K L M N O R S T V