AlsoEnergy weather station (digitizer and sensor kit)

The digitizer converts the analog sensor signals to digital values and sends them to the AlsoEnergy Data Logger over a Modbus RTU link on an RS-485 interface. It has six sensor inputs: two low-level, low-noise analog inputs, two inputs for 0-10 VDC or 4-20 mA, and two pulse inputs. The standard kit measures module temperature, ambient temperature, solar irradiance, and wind speed and direction. Relative humidity, barometric pressure and rain gauge sensors are optional add-ons. Terminals P1 and P2 supply +24 VDC, P8 and P10 take millivolt pyranometer signals, P10 also takes wind direction, and P12 supplies +2.5 VDC for the Davis wind sensor only. Mount the anemometer pointing north. The clear pyranometer shield wire does not go to the digitizer; it lands on the shield terminal of the RS-485 field terminal block. The Modbus ground is isolated from the analog and pulse grounds, and configuration and pulse data are kept in nonvolatile memory.

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• sentence 1: support check: partial - Conversion and Modbus RTU to the logger are stated, and the MODBUS/485 interface is mentioned, but nothing explicitly ties the Modbus RTU link to RS-485 to the logger. -->