Modbus RTU solar radiation sensor 3S-IS

with temperature sensorRS485

It's a Sensor Box for Solar PV Plants having a Modbus RTU Output. Besides Irradiance Sensor, it includes also an Internal Cell Temperature Sensor.It is compatible with all Modbus RTU Dataloggers. It is supplied along with Mounting Bracket and Cable. WORKING PRINCIPLES Solar irradiance is the power per unit area received from the sun and measured by the PV pyranometer, i.e. the irradiance sensor, as electromagnetic radiation in Watt per square meter (W/m²). This sensor consists of a solar cell made of monocrystalline silicon, which is activated by light and produces an electric current that is converted into millivolts (mV) thanks to the connected shunt resistor on its back side. A temperature sensor is located at the back of the cell to measure the temperature of the cell which causes a small deflection of the current. The temperature increases in inverse proportion to the current production of the cell. The monocrystalline cell and the temperature sensor are connected to an electronic card, which is designed to calculate the temperature compensated solar irradiance value in W/m². Thanks to the design of this card, it is possible to connect up to 7 different sensors and provides an RS485 port for data transfer in Modbus RTU protocol. SEVEN provides SunSpec compliance for the necessary devices, too. CONSTRUCTION FEATURES Monocrystalline Cell: The cell is laminated with 2 EVA sheets, one Tedlar sheet and 3mm tempered glass under 180 °C homogeneous temperature and under vacuum effect. The size of the monocrystalline cell is 52×52 mm² or 31x31mm².