Multi-interface LoRaWAN controller (version with an external antenna)

UC502 has 2 GPIO ports, which can be configured by software as digital inputs, digital outputs or pulse counters.

This enables contact states, alarm signals and meter pulses to be monitored or basic control of external devices to be performed.

In Pulse Counter mode, the manufacturer recommends an input signal frequency not exceeding 4000 Hzfunction.

The controller has 2 analogue inputs with 12-bit resolution.

Each channel can be switched by software between 4–20 mA and 0–10 V, enabling direct operation with common industrial transmitters.

UC502 can therefore collect values from pressure, level, temperature, humidity, flow and other process-variable transmitters.

One serial port can be configured by software as RS232 or RS485function.

The RS485 interface supports transparent communication and Modbus RTU, enabling data collection from meters, analysers, inverters, controllers and other industrial devices.

Supported transmission speeds range from 1200–115200 bpsfunction.

UC502 has 1 SDI-12 interface compliant with version SDI-12 V1.4function.

The SDI-12 standard is widely used in environmental, hydrological and agricultural monitoring devices, so the controller can integrate weather, soil-quality, water-level and other field instruments.

The interface also supports transparent transmission.

UC502 can supply power to connected sensors without requiring a separate energy source for each device.

Available are 2 outputs 3,3 V and 2 switchable 5 V / 9 V / 12 V outputsfunction.

3,3 V can be continuously available, while for 5/9/12 V outputs the advance power-on time before data acquisition can be set within the range 0–10 minutes. This allows the sensor to be powered only when a measurement is being taken, reducing battery consumption.

Variant 868M supports the EU868, IN865 and RU864function.

For the 868 MHz band, the maximum transmit power is 16 dBm, while receiver sensitivity reaches −137 dBm at 300 bpsfunction.

UC502 operates as a LoRaWAN® OTAA/ABP Class A, reducing energy demand and matching long-term battery operation.

Designation EA — External Antenna indicates the UC502 version equipped with an external antenna connector.

The controller has 1 × SMA Female 50 Ω, enabling use of a suitable LoRaWAN® antenna positioned in a more favourable location than the device itself.

The solution is particularly useful where the controller is located close to the ground, in a chamber, behind an obstacle or in another location that impairs radio-signal propagation.

The primary energy source for UC502 is 3 replaceable ER26500 Li-SOCl₂ batteries with a capacity of 9000 mAh eachfunction.

The controller can also be powered with external voltage 5–24 V DC via the M12 connector.

When an external source and batteries are connected simultaneously, the device prioritises external power. In UC502, the external voltage is not used to charge the Li-SOCl₂ batteriesfunction.

UC502 can generate Threshold Alarm when the configured limit value is exceeded.

Function Change Alarm also allows a response to a specified change in value relative to the previous measurement.

These mechanisms enable faster reporting of important events without transmitting data at a very short fixed interval.

UC502 has local memory for storing measurement records.

In the current documentation for the LoRaWAN® version, the manufacturer specifies storage of up to 600 records, later reading and retransmission.

The function helps reduce the risk of data loss during temporary gateway or LoRaWAN® network availability problems.

Basic UC502 configuration can be performed wirelessly via NFC using the Milesight ToolBox application.

Inside the enclosure there is also a port USB Type-C intended for configuration and the service console, and a Power/Reset button.

Settings can also be transmitted remotely via LoRaWAN® downlink messages.

UC502 uses a sealed enclosure and industrial M12 connectors designed for demanding field installations.

The IP68 was defined by the manufacturer for test conditions involving immersion at a depth of 1 m for 7 daysfunction.

The operating temperature range is from −30 to +70°C, and permissible relative humidity from 0 to 95% non-condensing.

The UC502 enclosure dimensions are 116 × 116 × 45,5 mm, excluding protruding connectors.

The manufacturer provides for mounting the device both on a wall and on a pole, making it easier to place the controller directly beside the supported sensors.