National Instruments DAQCard-1200 - Manual (Page 5)

Contents
DAQCard-1200 User Manual vi © National Instruments Corporation
Types of Signal Sources ................................................................... 3-6
Floating Signal Sources...................................................... 3-6
Ground-Referenced Signal Sources ................................... 3-6
Input Configurations......................................................................... 3-7
Differential Connection Considerations
(DIFF Configuration) ...................................................... 3-7
Differential Connections for Grounded Signal Sources..... 3-8
Differential Connections for Floating Signal Sources ....... 3-9
Single-Ended Connection Considerations.......................... 3-11
Single-Ended Connections for Floating Signal Sources
(RSE Configuration)........................................................ 3-11
Single-Ended Connections for Grounded Signal
Sources (NRSE Configuration) ....................................... 3-12
Common-Mode Signal Rejection Considerations.............. 3-13
Analog Output Signal Connections................................................................. 3-14
Digital I/O Signal Connections......................................................... 3-15
Port C Pin Connections..................................................................... 3-17
Timing Specifications....................................................................... 3-18
Mode 1 Input Timing ......................................................... 3-19
Mode 1 Output Timing....................................................... 3-20
Mode 2 Bidirectional Timing ............................................. 3-20
DAQ and General-Purpose Timing Signal Connections ................................ 3-22
DAQ Timing Connections................................................................ 3-22
General-Purpose Timing Signal Connections .................................. 3-26
Power Connections ......................................................................................... 3-31
Chapter 4
Theory of Operation
Functional Overview ..................................................................................................... 4-1
PC Card I/O Channel Interface Circuitry ...................................................................... 4-2
Timing ........................................................................................................................... 4-3
Analog Input .................................................................................................................. 4-5
Analog Input Circuitry .................................................................................... 4-6
Data Acquisition Timing................................................................................. 4-8
Data Acquisition Operation .............................................................. 4-8
Continuous Data Acquisition............................................................ 4-8
Interval Data Acquisition.................................................................. 4-9
Data Acquisition Rates.................................................................................... 4-9