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Contents

NI 2501/2503 User Manual

viii

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National Instruments Corporation

Appendix B
Accessories

Appendix C
Customizing Your Card

Appendix D
Architecture Drawings

Appendix E
Common Questions

Appendix F
Customer Communication

Figures

Front Connector Pinout Assignments for Two-Wire Mode ................. 1-5

Front Connector Pinout Assignments for One-Wire Mode .................. 1-6

Front Connector Pinout Assignments for Four-Wire Mode ................. 1-7

Front Connector Pinout Assignments to Create a 6 x 4 Matrix ............ 1-8

NI 2501 Module Block Diagram .......................................................... 2-2

NI 2503 Module Block Diagram .......................................................... 2-3

Bent and Trimmed Resistor .................................................................. C-2

NI 2501 Switch Architecture ................................................................ D-2

NI 2503 Switch Architecture ................................................................ D-3

Tables

Front Connector Signal Description .................................................... 1-9