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Contents

Chapter 1

Getting Started with the cDAQ Chassis

Safety Guidelines.............................................................................................................. 1-2

Safety Guidelines for Hazardous Voltages............................................................... 1-3

Electromagnetic Compatibility Guidelines ...................................................................... 1-3

Unpacking......................................................................................................................... 1-4

Installing the cDAQ Chassis............................................................................................. 1-5

Mounting the cDAQ Chassis............................................................................................ 1-7

Using the cDAQ Chassis on a Desktop .................................................................... 1-7

NI 9901 Desktop Kit for NI cDAQ-9174/9178 Chassis................................... 1-7

Mounting the cDAQ Chassis on a Panel .................................................................. 1-8

NI cDAQ-9171 ................................................................................................. 1-8

NI cDAQ-9174/9178 ........................................................................................ 1-8

Mounting the NI cDAQ-9174/9178 on a DIN Rail .................................................. 1-10

NI cDAQ Chassis Features............................................................................................... 1-11

Chassis Grounding Screw......................................................................................... 1-11

USB Cable Strain Relief........................................................................................... 1-12

LEDs......................................................................................................................... 1-12

Power Connector ...................................................................................................... 1-13

TRIG (PFI) BNC Connectors ................................................................................... 1-13

Cables and Accessories .................................................................................................... 1-13

Removing I/O Modules from the Chassis ........................................................................ 1-13

Using the cDAQ Chassis .................................................................................................. 1-14

C Series I/O Module ................................................................................................. 1-14

Parallel versus Serial DIO Modules ................................................................. 1-15

cDAQ Module Interface ........................................................................................... 1-15

STC3......................................................................................................................... 1-15

Chapter 2

Analog Input

Analog Input Triggering Signals ...................................................................................... 2-1

Analog Input Timing Signals ........................................................................................... 2-1

AI Sample Clock Signal ........................................................................................... 2-2

Routing the Sample Clock to an Output Terminal ........................................... 2-2

AI Sample Clock Timebase Signal........................................................................... 2-2

AI Convert Clock Signal Behavior For Analog Input Modules............................... 2-2

Scanned Modules.............................................................................................. 2-3

Simultaneous Sample-and-Hold Modules ........................................................ 2-3

Sigma-Delta Modules ....................................................................................... 2-3

Slow Sample Rate Modules.............................................................................. 2-4

NI CompactDAQ cDAQ-917 Series User Manual

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