Manual Do Utilizadoríndice analíticoNI PCI-8254R User Manual1Important Information3Warranty3Copyright3Trademarks3Patents3WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS3Compliance4Conventions5Contents6Chapter 1 Introduction8Software Overview8Vision Builder for Automated Inspection9Vision Development Module9IEEE 1394 and NI 8254R10Functional Overview10Figure 1-1. NI 8254R Block Diagram11Start Conditions11Acquisition Window Control11Chapter 2 Hardware Overview12Digital I/O12RIO and The LabVIEW FPGA Module12TTL Inputs and Outputs13Table 2-1. NI 8254R TTL Inputs and Outputs14Isolated Inputs and Outputs14Table 2-2. NI 8254R Isolated Inputs and Outputs15I/O for Normal Operation15Trigger Inputs16Timed Pulse Output16Initiating a Timed Pulse16Figure 2-1. Output pulse resulting from trigger selection17Pulse Modes17Pulse Delay17Pulse Width18Trigger Polarity18Figure 2-2. Output pulse generator18Figure 2-3. High and low pulse train18Trigger Change Detectors19Quadrature Encoder19Figure 2-4. Rising edge trigger and low pulse19Product Selection Port19Using ISO Input 5 as a Latch20Table 2-3. NI 8254R Product Selection Ports20General-Purpose I/O20General-Purpose Inputs21General-Purpose Outputs21I/O for Fault Conditions21Table 2-4. Fault Condition Behavior22Shutdown22Watchdog Timer22Considerations When Connecting the Digital I/O23Wiring an Isolated Input to a Sourcing Output Device23Figure 2-5. Connecting isolated input to a sourcing output device24Wiring an Isolated Output to an External Load24Figure 2-6. Digital output sources current to external loads24Protecting Inductive Loads25Figure 2-7. External flyback diode to protect inductive loads25Transmission Line Effects26Figure 2-8. Connections to the 44-pin D-SUB connector26Chapter 3 Signal Connections27Table 3-1. NI 8254R Connector Functions28Connectors282-Position Isolated Outputs Power Connector28Figure 3-1. NI 8254R Isolated Power Connector28Table 3-2. Power Connector Terminals29IEEE 1394a Connector29General-Purpose Digital I/O29Figure 3-2. NI 8254R 44-Pin D-SUB Connector30Table 3-3. Signal Connections30Cabling34IEEE 1394 Camera Cables34I/O Terminal Block34NI Vision I/O Terminal Block and Prototyping Accessory35Power Requirements35Isolated Outputs Power Connector35Figure 3-3. NI 8254R Isolated Power Connector35Table 3-4. Power Connector Terminals35Appendix A Technical Support and Professional Services36Glossary38A-F38H-P39Q-V40Index41A-L41N-S42T-W43Tamanho: 400 KBPáginas: 43Language: EnglishAbrir o manual