The SI5100 wind speed interface module is used for interfacing the #40 anemometer to an analog device such as a computer, meter, or recorder. The module output signal is a negative ground voltage set at 0 to 5 VDC at wind speeds ranging from 0 to 44.7 m/s (0 to 100 mph). Power is supplied by any 12VDC source. The SI5100 is packaged in a plastic case with an octal plug. DIN-rail mountable octal socket with screw terminals is included.