4G remote monitoring of unmanned sites: architecture and checklist
How to connect an unmanned site over 4G: outgoing connections or VPN, power, alarms, buffering when offline, and which ICP DAS devices fit.
Edge controllers, MQTT and OPC UA devices, 4G gateways and software for remote sites and machines.
Remote monitoring means knowing the state of equipment without being on site: pumping stations, substations, machines installed at customer sites, cold rooms or technical rooms spread over a large area. The core components are I/O or sensors on site, a device that collects the data and sends it securely, and software that stores and displays it and raises alarms.
Many ICP DAS I/O modules publish their data directly over MQTT or provide it through an OPC UA server, so no separate gateway is needed. The WISE series adds IF-THEN logic rules that are configured in a web browser, so a module can switch outputs, log data and send notifications on its own. Ethernet I/O such as the ET-7000 and ET-2200 series offers Modbus TCP and a web interface, and the ETS-7200 series adds cybersecurity features for networks with stricter requirements.
Edge controllers collect data from I/O modules, meters and other Modbus devices, apply logic and forward the results to SCADA, databases or cloud services. Communication servers such as the UA series convert Modbus data to OPC UA and MQTT, which makes existing equipment visible to MES and IT systems without changing anything at field level.
For sites without a wired Internet connection, industrial 4G modems and gateways provide the link. Selected models combine the modem with I/O or Modbus gateway functions in one device.
IoTstar is ICP DAS software for managing IIoT devices and visualising their data, with dashboards, alarms and data storage. It can be installed on your own server or a cloud instance, so you decide where the data is kept.
At each pumping station a WISE module reads pump status, level and pressure and runs local IF-THEN rules, for example to stop a pump on dry-running. It publishes the values over MQTT through a 4G connection to IoTstar on a central server, where operators see all stations on one dashboard and receive alarms. The local rules keep working if the mobile connection drops.
Describe the sites and the data you need, and we will suggest a combination of I/O, edge device and software.
The PET-7017-10 is a PoE-powered Ethernet analog input module for engineers who need voltage or current measurement on a networked I/O node. Its inputs can be set as 10 differential or 20 single-ended channels in software, and each channel can be given its own range, so one module can serve mixed sensor types on the same network.Each channel offers a choice of voltage ranges from ±150 mV to ±10 V and current ranges of ±20 mA, 0 ~ 20 mA and 4 ~ 20 mA, selected with jumpers. Resolution is 16-bit, and the module has two sampling modes: normal mode at 10 Hz total and fast mode at 50 Hz total. Open wire detection is available for 4 ~ 20 mA inputs, and differential channels are rated for 240 Vrms overvoltage protection.Configuration and monitoring are handled through a built-in web server with Web HMI, and the module supports Modbus TCP and Modbus UDP. Access is controlled by ID, password and IP filter. The unit is powered either from PoE (IEEE 802.3af, Class 1) or from a +12 ~ +48 VDC terminal block, and it mounts on a DIN rail.ApplicationsBuilding automationFactory automationMachine automationRemote maintenanceRemote diagnosisTesting equipment
CL-202-E CR is a data logger module for monitoring indoor air quality and climate conditions. It measures CO2 with a non-dispersive infrared (NDIR) sensor, alongside temperature, relative humidity and dew point, and records the results with date and time stamps for later analysis.The module offers an RS-485 port and an Ethernet port with PoE support, so it can be integrated into existing HMI or SCADA systems over DCON, Modbus RTU, Modbus TCP or MQTT. Real-time readings can be viewed from the iAir Utility, the iOS or Android apps, or a web browser, provided the logger is on the same local network. Logged data can be exported to CSV for analysis in standard spreadsheet or industry software.Relay output for alarm signalling or control of IAQ equipmentCeiling or wall mounting, IP20 housing, Ø 150 x 53 mmOperating temperature 0 ~ 50°C, non-condensing humidity range 10 ~ 90% RHApplicationsTransportation of food or pharmaceuticalsFood and beverage industry (HACCP)Blood stations and pharmaciesBuilding and energy managementWarehouse managementMuseums, archives and galleriesIndoor or underground parking lot air quality monitoring
DL-100TM485S is a black-cover, IP66 remote data logger for monitoring temperature and relative humidity over a -20 to +60 °C and 0 to 100% RH measurement range. Readings are stored internally, shown on an LCD and made available over RS-485 using Modbus RTU, so the module can feed a supervisory system or be read on site.This non-P version has a typical accuracy of ±0.4 °C and ±3% RH between 20 and 80% RH. Logging intervals run from 10 seconds to 1 day, and when storage is full the module can either overwrite older records or stop logging, as configured.Configuration, retrieval and charting are handled with the DL Utility, which can export data to Excel. The unit runs from 10 to 30 VDC, mounts on a DIN-rail or wall, and is rated IP66 for harsh or washdown environments.ApplicationsTransportation of food or pharmaceuticalsFood and beverage industry (HACCP)Blood stations and pharmaciesBuilding and energy managementWarehousesMuseums, archives and galleries
The DL-303 CR records carbon monoxide, carbon dioxide, temperature, humidity and dew point together, with date and time stamps on every record. Readings are shown simultaneously on a 2.8-inch touch screen, and a single relay output can drive an alarm device or an indoor air quality (IAQ) control device.Data can be read over RS-485 using DCON or Modbus RTU, or over Ethernet using Modbus TCP or MQTT. The unit can be powered from PoE (IEEE 802.3af, Class 1) or from a +12 ~ +48 VDC terminal block, which simplifies installation where a network cable is already present. Configuration is available through the touch screen or the built-in web server.Logged data can be downloaded and exported to CSV for analysis. Free Windows utility software, iOS and Android apps are included, and multilingual on-screen messages can be shown to prompt operators. The device is listed with CE, UKCA, FCC, RoHS and WEEE certification.ApplicationsTransportation of food or pharmaceuticalsFood and beverage industry (HACCP)Blood stations and pharmaciesBuilding and energy managementWarehouse managementMuseums, archives and galleries
How to connect an unmanned site over 4G: outgoing connections or VPN, power, alarms, buffering when offline, and which ICP DAS devices fit.
How MQTT and OPC UA differ in communication model, data description and security, and which ICP DAS devices support each protocol.
How the browser-configured IF-THEN-ELSE rules on WISE modules handle local logic, logging and alarms, with a worked example and the limits.
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