Data Logger
A data logger for SCADA (Supervisory Control and Data Acquisition) systems serves the critical function of recording and storing data from various sensors and devices in the field. Here’s a breakdown of what a data logger for SCADA typically involves:
Data Acquisition: The primary function of a data logger is to collect data from sensors, meters, and other devices in real-time or at scheduled intervals. This data can include measurements such as temperature, pressure, flow rates, voltage levels, etc.
Storage and Logging: The data logger stores the acquired data in its internal memory or external storage devices. It logs the data with timestamps to maintain a chronological record of events and measurements.
Communication Interfaces: Data loggers are equipped with communication interfaces to transfer logged data to the SCADA system or other monitoring stations. Common communication protocols used include Modbus, DNP3, OPC, MQTT, etc.
Integration with SCADA: Data loggers interface with the SCADA system to provide continuous data updates. They typically connect to the SCADA master station or server through wired or wireless networks.
Real-time Monitoring: Some advanced data loggers may support real-time monitoring capabilities, allowing operators to view data as it is logged and make immediate decisions based on current conditions.
Data Storage Capacity: The storage capacity of a data logger varies depending on the application and the frequency of data logging. It should have sufficient storage to accommodate data for extended periods before archival or transmission.
Security Features: As with RTU panels, data loggers may incorporate security features such as encryption, authentication mechanisms, and secure communication protocols to protect data integrity and prevent unauthorized access.
Choosing the right data logger for SCADA involves considering factors such as compatibility with existing SCADA infrastructure, data logging requirements (frequency, volume), environmental conditions, and cybersecurity measures. It plays a crucial role in ensuring the reliability and efficiency of data acquisition and management within SCADA systems.
Remote Terminal Unit
An RTU (Remote Terminal Unit) panel for SCADA (Supervisory Control and Data Acquisition) typically serves as an interface between field devices and the SCADA system. Remote Terminal Unit is the core component that interfaces with sensors, actuators, and other devices in the field. It collects data from these devices and sends it to the SCADA system for monitoring and control. RTUs often support various communication protocols such as Modbus, DNP3, IEC 60870-5-101/104, etc., to communicate with field devices and the SCADA master station.