National Instruments NI PCI-6110, NI PCI-6111 - page 91

Appendix C Common Questions

NI PCI-6110/6111 User Manual C-6 ni.com

Caution If you enable a PFI line for output, do not connect any external signal source to

it. Connecting external signals to enabled PFI lines can damage the device, the computer,

and the connected equipment.

What are the power-on states of the PFI and DIO lines on the I/O

connector?

At system power-on and reset, both the PFI and DIO lines are set to

high-impedance by the hardware. This means that the device circuitry is not

actively driving the output either high or low. However, these lines may

have pull-up or pull-down resistors connected to them as shown in

Table 4-3, I/O Signal Summary for the NI PCI-6110/6111. These resistors

weakly pull the output to either a logic high or logic low state. For example,

DIO(0) is in the high impedance state afterpower-on, and Table 4-3 shows

that there is a 50 kΩ pull-up resistor. This pull-up resistor sets the DIO(0)

pin to a logic high when the output is in a high-impedance state.

Table C-1. Signal Name Equivalencies

Hardware

Signal Name

LabVIEW

Route Signal NI-DAQ Select_Signal

AIGATE —ND_IN_EXTERNAL_GATE

AOGATE —ND_OUT_EXTERNAL_GATE

CONVERT* AI Convert ND_IN_CONVERT

SISOURCE —ND_IN_SCAN_CLOCK_TIMEBASE

STARTSCAN AI Scan Start ND_IN_SCAN_START

TRIG1 AI Start Trigger ND_IN_START_TRIGGER

TRIG2 AI Stop Trigger ND_IN_STOP_TRIGGER

UISOURCE —ND_OUT_UPDATE_CLOCK_TIMEBASE

UPDATE* AO Update ND_OUT_UPDATE

WFTRIG AO Start Trigger ND_OUT_START_TRIGGER

Contents

Main Page Important Information Warranty Copyright Trademarks Patents Compliance FCC/Canada Radio Frequency Interference Compliance Determining FCC Class FCC/DOC Warnings Class A Contents Chapter 4 Connecting Signals Page About This Manual Conventions National Instruments Documentation Related Documentation Introduction About the NI PCI-6110/6111 What You Need to Get Started Software Programming Choices NI-DAQ National Instruments ADE Software Optional Equipment Custom Cabling Unpacking Safety Information Page Page Installing and Configuring the NI PCI-6110/6111 Installing the Software Installing the Hardware Configuring the Device National Instruments Corporation 3-1 NI PCI-6110/6111 User Manual Hardware Overview DAQ - STC RTSI Bus Figure 3-1. NI PCI-6110 Block Diagram I/O Connector Analog Input Input Mode Note The inputs are differential only in the sense that the ground loops are broken. The I/O Connector RTSI Bus Input Polarity and Input Range Considerations for Selecting Input Ranges Input Coupling Analog Output Analog Trigger Figure 3-3. Analog Trigger Block Diagram for the NI PCI-6110 Figure 3-4. Analog Trigger Block Diagram for the NI PCI-6111 Page Page Digital I/O Timing Signal Routing Page Programmable Function Inputs Device and RTSI Clocks RTSI Triggers Connecting Signals I/O Connector Figure 4-1. 68-Pin I/O Connector Pin Assignment for the NI PCI-6110/6111 Figure 4-2. 50-Pin Connector Pin Assignments for the NI PCI-61 10/6111 I/O Connector Signal Descriptions Table 4-2. Signal Descriptions for I/O Connector Pins Page Page Table 4-3. I/O Signal Summary for the NI PCI-6110/6111 Table 4-3. I/O Signal Summary for the NI PCI-6110/6111 (Continued) Connecting Analog Input Signals Types of Signal Sources Floating Signal Sources Ground-Referenced Signal Sources Differential Measurements Differential Connection Considerations Differential Connections for Ground-Referenced Signal Sources Figure 4-4. Differential Input Connections for G round-Referenced Signals Differential Connections for Nonreferenced or Floating Signal Sources Common-Mode Signal Rejection Considerations Working Voltage Range Analog Output Signal Connections Digital I/O Signal Connections Power Connections Timing Connections Programmable Function Input Connections DAQ Timing Connections TRIG1 Signal TRIG2 Signal Page STARTSCAN Signal Page CONVERT* Signal AIGATE Signal SISOURCE Signal SCANCLK Signal EXTSTROBE* Signal Waveform Generation Timing Connections WFTRIG Signal UPDATE* Signal UISOURCE Signal General-Purpose Timing Signal Connections GPCTR0_SOURCE Signal GPCTR0_GATE Signal GPCTR0_OUT Signal GPCTR0_UP_DOWN Signal GPCTR1_SOURCE Signal GPCTR1_GATE Signal GPCTR1_OUT Signal GPCTR1_UP_DOWN Signal Page FREQ_OUT Signal Field Wiring Considerations Page Calibration Loading Calibration Constants Self-Calibration External Calibration A Specifications Analog Input Input Characteristics Accuracy Information Transfer Characteristics Amplifier Characteristics Dynamic Characteristics Stability Analog Output Output Characteristics Transfer Characteristics Voltage Output Dynamic Characteristics Stability Digital I/O Timing I/O General-Purpose Up/Down Counter/Timers Frequency Scaler Triggers Analog Trigger Digital Trigger External Input for Digital or Analog Trigger (PFI0/TRIG1) Page Environmental Safety Electromagnetic Compatibility CE Compliance Page Figure B-1. 68-Pin Connector Pin Assignment for the NI PCI-611 0/6111 Figure B-2. 50-Pin Connector Pin Assignment for the NI PCI-611 0/6111 C Common Questions General Information Installing and Configuring Analog Input and Output Timing and Digital I/O Page Page D Technical Support and Professional Services Page Glossary Numbers/Symbols A B C D E F G H I K L M N O P Page R S T U V W Index Symbols Numerics A B C D E F G H I K L M N O Q R S T U V W