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Application Note

PLC and SCADA Integration of USB Data Loggers Using Smart-Hub

PLC and SCADA Integration of USB Data Loggers Using Smart-Hub

MEI 21/10/2026 0
PLC and SCADA Integration of USB Data Loggers Using Smart-Hub Many industrial monitoring systems already use PLCs, HMIs, or SCADA software as the main supervisory platform. At the same time, standalone USB data loggers may already be installed for temperature, voltage, current, humidity, pulse, state, or other measurements.Microedge Smart-Hub provides a practical way to connect supported USB data loggers to an Ethernet network and make their real-time measurements available to industrial systems through Modbus TCP.This Application Note shows how a USB data logger can be integrated into a PLC or SCADA system using Smart-Hub as a communication gateway.  1. Application A typical application may already include one or more USB data loggers installed close to sensors or equipment.Examples include:Temperature monitoring4–20 mA process transmittersVoltage monitoringRelative humidityEquipment state monitoringPulse or event countingLaboratory or test-system measurementsThe customer may want these measurements to become available to an existing:PLCHMISCADA systemIndustrial PCBuilding-management systemCustom Modbus TCP applicationInstead of replacing the USB data loggers, they can be connecte...
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Remote Temperature Monitoring for Refrigerators, Freezers and Cold Storage

Remote Temperature Monitoring for Refrigerators, Freezers and Cold Storage

MEI 20/10/2026 0
Refrigerators, freezers, cold rooms, and other temperature-controlled storage areas often require continuous temperature monitoring rather than occasional manual checks.By connecting temperature sensors to a Microedge data logger, temperatures can be recorded automatically, viewed in real time, and monitored remotely through a PC or web browser. Alarm thresholds can also be configured to help identify temperatures that move outside the desired range.This Application Note shows several practical ways to build a remote temperature monitoring system using Microedge data loggers and software.  1. Application Typical applications include:RefrigeratorsFreezersWalk-in coolersCold roomsFood storage areasLaboratory refrigeratorsPharmaceutical storageEnvironmental chambersTemperature-controlled warehousesA typical monitoring system consists of:Temperature Sensor → Data Logger → Network → Monitoring Software → Browser / PCThe data logger records temperature continuously while the monitoring software provides access to current and historical data.  2. Choosing the Temperature Sensor The most appropriate sensor depends on the temperature range and installation.ThermocouplesThermocouples are use...
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Remote Tank Level Monitoring Using a 4–20 mA Level Transmitter

Remote Tank Level Monitoring Using a 4–20 mA Level Transmitter

MEI 20/10/2026 0
Tank level is commonly measured with pressure, hydrostatic, ultrasonic, or other level transmitters that provide a 4–20 mA output. By connecting the transmitter to a Microedge current-input data logger, the level can be recorded continuously, converted into engineering units, and monitored locally or remotely.This Application Note shows a typical system for monitoring tank level using a 4–20 mA transmitter.  1. Application Consider a storage tank where the liquid level must be monitored continuously.Instead of checking the tank manually, a 4–20 mA level transmitter measures the liquid level and sends the signal to a data logger.A typical system consists of:Level Transmitter → 4–20 mA → Data Logger → PC / Network → Monitoring SoftwareThe system can provide:Continuous level recordingReal-time level displayHistorical graphsEngineering-unit conversionRemote monitoringAlarm monitoring when used with supported software and system configurations  2. Typical Measurement System A common two-wire 4–20 mA transmitter requires an external DC power supply.A typical loop is:24 VDC Power Supply (+) → 4–20 mA Level Transmitter → Microedge Current Input → 24 VDC Power Supply (−)The transmitter cont...
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