DAVIS Electronic Rain Counter Guide de l'utilisateur télécharger pdf (Page 31)

4. Appendix

A1. Electrical connections

Equipment and power connections to the C3 module are made via 4-way 3.81 mm

pluggable screw terminal blocks, with the exception of the DC jack power input

(typically used when supplying power via a 240 VAC wall plug pack). RF antenna

connections are made via SMA and BNC connectors. The following describes

these connections and the relevant connector pin assignments for each function.

Dual purpose digital/analog inputs (x4)

• $POæHVSBCMFEJHJUBMTJOLPSTPVSDFQVMMVQPSQVMMEPXOGPSDPOOFDUJPOUP

 QVMTFPVUQVUçPXNFUFSTSBJOHBVHFTBOEPUIFSTXJUDIJOHPSWPMUBHF

output devices

• 5 V pull-up voltage (switch-able)

• Tolerant up to 30 V

• Frequency and pulse counting up to 1 kHz (@ 50% duty cycle)

• 0 – 10 V analog input mode with 10 kΩ input impedance, +/- 1% accuracy

over full scale range

4. Appendix

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DAVIS Electronic Rain Counter Guide de l'utilisateur Page 31