Used product. The Meteocontrol WEB’log PRO (Article No. 421.145) is a professional data logger for monitoring and supervising photovoltaic systems, designed to collect, process and transmit data from inverters, sensors, meters and other field devices. Official documentation identifies hardware code 300659 as WEB’log PRO Analog. The product belongs to a series that is now discontinued and no longer maintained by the manufacturer.

⚙️ Technical Specifications

• Brand: Meteocontrol
• Model: WEB’log PRO
• Identification: 421.145
• Version: PRO Analog
• Item No.: 300659 0710 011
• Production year: YOM 2010
• Type: Data Logger / Monitoring System
• Analog inputs: 4 × AI1–AI4
• Digital inputs: 4 × DI1–DI4
• Display: integrated LCD for displaying and managing parameters
• Front keypad: UP / DOWN / ENTER / EXIT
• Digital output: DO1
• Power supply: 110/230 VAC or 24 VDC, according to configuration
• Auxiliary sensor supply: 24 VDC
• Installation: suitable for electrical panel installation
• Construction: professional construction for data acquisition and monitoring systems
  The analog inputs can be used to acquire signals from sensors, with configuration of the relevant measurement parameters. The WEB’log also allows devices and sensors to be connected through serial interfaces and the acquired values to be checked through the monitoring system.

⚡ Function in the Electrical System

Monitoring and supervision system for ON-GRID photovoltaic systems.
The WEB’log PRO is installed as the plant's central data acquisition unit. It can collect information from PV inverters, environmental sensors and meters, allowing supervision of the main operating parameters of the system.
Communication with the inverters can take place via RS485 or Ethernet, using the protocol or driver compatible with the connected device. Meteocontrol documentation confirms the possibility of scanning and communicating with inverters through RS485/Ethernet.

📡 Interfaces and Communication

• RS485
• RS422
• RS232
• Ethernet
• PSTN / analog modem provided in the PRO Analog configuration
• Digital inputs for status and counting signals
• Analog inputs for sensors and measuring instruments
  The RS485 interface can also be used to connect Modbus sensors, after configuring the communication parameters and the relevant device.

🌐 Applications

The WEB’log PRO 421.145 is suitable for applications such as:

• Photovoltaic system monitoring
• Data acquisition from PV inverters
• Irradiance and temperature monitoring
• Acquisition of analog and digital signals
• Connection of meters and sensors
• Supervision and collection of production data history
• Control and management systems for professional photovoltaic installations

🏭 Installation and Connections

The device is designed to be installed inside an electrical panel or monitoring system, with the various devices connected through the terminal blocks and interfaces located on the front.
The four analog inputs AI1–AI4 and four digital inputs DI1–DI4 allow different field devices to be integrated. Sensor configuration is performed by setting the relevant measurement parameters and connecting the sensor according to the diagram specified for the device.

🛡️ Safety and Product Condition

Used product, with normal signs of use and handling. The photographs show the device, original box, manual/guide and cable/accessory.
The device belongs to an earlier generation of Meteocontrol systems and is now out of production and no longer maintained by the manufacturer.
Before commissioning, it is recommended to verify the power supply, display, analog/digital inputs, communication ports and operation of the data acquisition system. For an untested used product, operational functionality of the inputs and interfaces is not guaranteed.
⚠️ Safety note: the 110/230 VAC power connection must be carried out exclusively by qualified personnel, with the device correctly installed inside the panel.

📦 Package Contents

• 1 × Meteocontrol WEB’log PRO 421.145

🚀 Final Description

The Meteocontrol WEB’log PRO 421.145 – PRO Analog is a professional data logger for photovoltaic systems, equipped with 4 analog inputs, 4 digital inputs, RS485, RS422, RS232, Ethernet and PSTN communication, intended for collecting and supervising data from inverters, sensors and meters. The PRO Analog – Item No. 300659 configuration identifies a professional version of the WEB’log series.