IIoT Devices — Which Sensor

IIoT devices in this category acquire signals from the field, digitize them, and forward measured values over Ethernet or fieldbus to higher-level systems. Typical functions cover current measurement, multiprotocol gateways, I/O hubs, and remote I/O nodes for condition monitoring and process data acquisition. Deployment contexts include retrofit on existing machines, decentralized I/O cabinets, and edge connections to MES or cloud platforms.

Channel counts in the assortment cover 1, 2, 4, 8, and 16 channels, with the 8-channel variant most common for modular I/O hubs and current sensor concentrators.

Supply voltages cluster around 24 VDC ranges: 9 VDC lower limit, 10 VDC, 12 VDC, and 22 VDC lower bounds. Ambient ratings span -40 °C for outdoor and unheated installations, -25 °C, -20 °C, and 0 °C for cabinet-mounted gateways.

Product families include the BL20 modular I/O system, M12 connector variants, and RS485 serial nodes for legacy integration. Pre-wired sensor cables come in 15 m and 30 m lengths. Manufacturer focus lies with Turck for fieldbus and remote I/O, and in.hub for HUB-series edge gateways.

Interface coverage includes PROFINET, EtherNet/IP, and Modbus TCP on multiprotocol gateways, plus CODESYS-programmable variants for the BL67 platform. Specialty units cover excom I/O for hazardous areas and current sensors SENS-CUR120, CUR300, and CUR600 for direct power monitoring at the machine.