The Milesight UC300 is a compact I/O controller for plant rooms, pump stations and machines. It reads switches, pulse meters, 4-20 mA and 0-10 V transmitters, PT100 probes and Modbus devices, drives two relays, and sends it all over LoRaWAN or 4G.
Why pick it
- 4 digital inputs (also pulse counters), 2 relay outputs, 2 x 4-20 mA, 2 x 0-10 V, 2 x PT100, plus RS232 and RS485 with Modbus RTU for up to 32 devices.
- Local IF-THEN rules switch the relays on a reading even when the network is down.
- Metal case, -20 to +60 °C, with surge and reverse-polarity protection on the power input.
The LoRaWAN version runs in Class C. The 4G LTE Cat 1 version reports over TCP, UDP, MQTT or to Milesight IoT Cloud, for sites with no gateway.
Works with any standard LoRaWAN gateway and network server, such as the Milesight UG65 indoors or the UG67 outdoors, with alerts and dashboards on IoT Factory.
For Modbus only, the UC100 is the smaller, simpler option.


















