User`s manual

xiv Table of Contents
PCI-9524 ADLINK Technology Inc.
User’s Manual Copyright 2008
3 Signal Connections .......................................................... 27
3.1 Connectors & Pin Assignments ......................................... 27
3.2 Analog Input Signal Connections....................................... 33
3.2.1 Signal Sources.................................................................... 33
3.2.2 Input Configurations............................................................ 34
3.3 Isolated Digital Signal Connection ..................................... 38
3.3.1 Signal Sources and Terminal Devices ................................ 38
3.3.2 Connecting to/from External Encoders ............................... 40
3.3.3 Connecting to External Servo Amplifiers ............................ 42
3.3.4 Interfacing Isolated DO with External Loads....................... 43
3.3.5 Interfacing Isolated DI with External Devices...................... 45
4 Operation Theory .............................................................. 47
4.1 PCI-9524 Function Diagram .............................................. 47
4.2 Analog Input Channels....................................................... 48
4.2.1 Signal Acquisition and Processing Flow ............................. 48
4.2.2 How to Define a 1 in 200,000 Count Resolution ................. 49
4.2.3 Data Rate versus Sampling Rate........................................ 51
4.2.4 Auto-scan, Multiplexing and Settling Time.......................... 51
4.2.5 Power Line Noise Rejection................................................ 53
4.2.6 Excitation and Remote-sensing .......................................... 54
4.2.7 Thermal EMF, 1/f Noise and Auto-zero .............................. 55
4.2.8 Warm-up Requirement........................................................ 58
4.2.9 Post-processing IIR Digital Filter......................................... 58
4.2.10RAW Data Format............................................................... 61
4.2.11AD Data Format .................................................................. 62
4.2.12Data Transfer Modes .......................................................... 64
4.2.13Trigger Modes..................................................................... 66
4.3 D/A Conversion.................................................................. 67
4.4 Isolated Encoder Input Channels....................................... 67
4.5 Isolated Pulse-Command Generator ................................. 69
4.6 Isolated Digital I/O.............................................................. 69