National Instruments NI 6509 Power Connections

© National Instruments Corporation 15 NI 6509 User Guide and Specifications

Power Connections

Pins 49 and 99 supply +5 V power to the I/O connector. The I/O connector

power has a fuse for overcurrent protection. This fuse is not customer

replaceable. If the fuse is blown, return the device to NI for repair.

Caution Do not connect the +5 V power pin directly to ground or to any other voltage

source on any other device. Doing so may permanently damage the NI 6509 device and the

computer.

Signal Connections

The maximum input logic high and output logic high voltages assume a

Vcc supply voltage of 5 V. The absolute maximum voltage rating is –0.5 to

+5.5 V with respect to GND. Refer to the Specifications section for detailed

information.

Figure5 shows an example of signal connections for three typical digital

I/O applications. Port 0 is configured for digital output, and port 7 is

configured for digital input. Digital input applications include receiving

TTL signals and sensing external device states such as the state of the

switch in the figure. Digital output applications include sending TTL

signals and driving external devices such as the LED shown in the figure.

Contents

Main USER GUIDE AND SPECIFICATIONS NI 6509 Contents Configuration Programming Devices in Software Functional Overview Safety Information Page Related Documentation Features Digital Filtering Digital Filtering Example Programmable Power-Up States Change Detection Change Detection Example Watchdog Timer Digital I/O Connections Pin Assignments SH100-100-F Connector NI 6509 User Guide and Specifications 12 ni.com Figure 3. SH100-100-F Connector Pinout R1005050 Connector Figure 4. R1005050 Connector Pinout Signal Descriptions Power Connections Signal Connections Protecting Inductive Loads Figure 6. Limiting Flyback Voltages at the Inductive Load Sinking and Sourcing Examples Figure 8. NI 6509 Sourcing Connection Example, <24 mA Driving a Relay <24 mA Figure 7. NI 6509 Sinking Connection Example, <24 mA Driving a Relay >24 mA Figure 11. NI 6509 SSR Connection Example Figure 9. NI 6509 Sinking Connection Example, >24 mA Figure 10. NI 6509 Sourcing Connection Example, >24 mA Driving SSRs Accessories Specifications Power Requirements Digital I/O Digital Logic Levels Input Signals Output Signals (Vcc = 5 V) Physical Characteristics Environmental Operating Environment Storage Environment Shock and Vibration (PXI-6509 Only) Safety Electromagnetic Compatibility CE Compliance Environmental Management RoHS