Campbell Scientific SDM-SW8A 8-Channel Switch Closure Input Module - Manual (Page 3)

SDM-SW8A Table of Contents
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1. Function........................................................................1
2. Specifications ..............................................................2
3. Power Supply Considerations ....................................3
4. Connections .................................................................4
4.1 Connections to Dataloggers and Other SW8As........................................4
4.2 Sensor Connections ..................................................................................4
5. Internal Jumpers..........................................................4
5.1 Address Jumpers.......................................................................................4
5.2 Measurement Jumpers ..............................................................................6
6. Datalogger Programming............................................6
6.1 CRBasic Programming .............................................................................6
6.1.1 SDMSW8A Instruction...................................................................6
6.1.2 SDMSpeed Instruction....................................................................7
6.2 Edlog Programming..................................................................................9
7. Datalogger Program Details .....................................10
7.1 Datalogger Scan Rate .............................................................................10
7.2 First Scan ................................................................................................10
7.3 Watchdog Reset......................................................................................11
8. Measurement Applications .......................................13
8.1 SPDT Switch Closure.............................................................................13
8.2 SPST Switch Closure..............................................................................13
8.3 DC Voltage Pulse ...................................................................................14
8.4 Duty Cycle..............................................................................................14
9. Theory of Operation ..................................................15
Appendix
A. Edlog Program Example......................................... A-1
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