Campbell Scientific SDM-IO16 16-Channel Input/Output Expansion Module - Manual (Page 6)

SDM-IO16 Table of Contents
ii
Appendices
A. General Principles of Pulse and Frequency
Measurements .................................................... A-1
A.1 Introduction......................................................................................... A-1
A.2 Frequency and Duty Cycle Measurement Range ................................ A-1
A.3 Resolution of Frequency Measurements ............................................. A-2
A.4 Resolution of Duty Cycle Measurements............................................ A-2
A.5 Debounce Filtering.............................................................................. A-3
B. Command Code Listing .......................................... B-1
Figures
1. SDM-IO16 (with mounting brackets) ........................................................ 1
2. Simplified Equivalent Port Circuits ........................................................... 5
3. Connection Block Diagrams ...................................................................... 6
4. Use of Terminal Blocks ............................................................................. 7
5. Address Selection Switch .......................................................................... 8
Tables
1. Datalogger to SDM-IO16 Connections...................................................... 6
2. Bit Period Value....................................................................................... 12
3. Summary of the Common Command Codes relative to Port Number
and Function .................................................................................. 17