DFRobot
LoRaWAN Control Terminal (US 915MHz, 4km Range, RS485)
· MPN: DFR1120-915
The LoRaWAN Control Terminal is a comprehensive Industrial IoT (IIoT) node that bridges field devices with remote cloud platforms. Operating on the US 915MHz...
The LoRaWAN Control Terminal is a comprehensive Industrial IoT (IIoT) node that bridges field devices with remote cloud platforms. Operating on the US 915MHz band with up to 4km range, this DIN-rail mountable controller integrates data acquisition, logic processing, and device actuation into a single unit.
Unlike standard sensors that only transmit data, this RTU (Remote Terminal Unit) handles both reading and writing operations – collect data from Modbus sensors while simultaneously controlling pumps, valves, or alarms via the built-in relay. Edge logic capabilities allow autonomous operation even when network connectivity is lost.
Key Features
- Long-Range LoRaWAN – 915MHz connectivity with 22dBm transmit power and -137dBm sensitivity for reliable communication up to 4km
- RS485 Modbus RTU – Connect industrial sensors including soil monitors, water quality probes, and weather stations
- Analog Input – 0-10V input channel for voltage-based sensors
- Digital Inputs – 2× optocoupler-isolated inputs (5-24V) for switches and digital signals
- Relay Output – Normally-open relay rated for 24VDC 3A / 220VAC 3A to drive actuators directly
- Edge Logic – Set local control rules (e.g., "If moisture < 20%, activate relay") via visual configuration
- Offline Autonomy – Continues executing preset logic during network outages
- DIN-Rail Mounting – Industrial-grade installation with included mounting hardware
Ideal For
- Smart agriculture – automated irrigation triggered by soil moisture data
- Industrial automation – remote monitoring and Modbus energy meter integration
- Building management – HVAC monitoring and automated lighting control
- Environmental monitoring – remote weather stations and aquaculture water quality
Specifications
- Input Voltage – 12-24V DC
- Operating Temperature – -10°C to 60°C
- Dimensions – 89 × 53 × 24mm (excluding terminals and mounting hardware)
- Weight – 300g
Communication Interfaces
- RS485 – 1× port, Modbus RTU protocol
- Analog Input – 1× channel, 0-10V
- Digital Inputs – 2× optocoupler-isolated, 5-24V
- Relay Output – 1× normally-open, 24VDC 3A / 220VAC 3A
Wireless Specifications
- Frequency Band – 902-928MHz (US 915MHz)
- Transmit Power – 22dBm
- Receive Sensitivity – -137dBm @ 125kHz, SF=12
- Operating Modes – OTAA/ABP, Class A/C
Package Contents
- 1× LoRaWAN Control Terminal (915MHz)
- 1× Rubber Antenna
- 2× Mounting Lugs
- 2× DIN Rail Clips
- 4× M4×6 Mounting Screws
- 2× Plug-in Terminal (4-pin)
- 2× Plug-in Terminal (2-pin)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- DIN
- DIN means data in, the pin where this display receives data from the controller. Connecting DIN to the correct SPI data output pin is needed for the screen to receive pixel and command information.
- DIN rail
- DIN rail is a standard metal mounting rail used inside industrial electrical cabinets. DIN rail mounting matters because it lets the controller be installed neatly alongside power supplies, relays, and other automation hardware.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- Modbus
- Modbus is an industrial communication protocol used by many meters, sensors, PLCs, and automation devices. Modbus support matters because it can make the controller easier to integrate with existing industrial equipment.
- Modbus RTU
- Modbus RTU is a version of Modbus commonly used over RS485 serial wiring. It matters if you need to connect the controller to industrial sensors, meters, or drives that use serial Modbus rather than Ethernet.
- pH
- A measure of how acidic or alkaline a liquid is, on a scale where 7 is neutral. For a water monitoring kit, pH tells you about water chemistry and whether the included probe matches the range and accuracy your project needs.
- RS485
- RS485 is a robust wired serial communication standard often used in factories, farms, and buildings where cables may be long or electrically noisy. It matters because it lets this controller connect to industrial sensors, meters, and control equipment over longer distances than typical hobby serial wiring.
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