Bridge LR is a physical media conversion gateway, designed to communicate Modbus RTU devices via a LoRa™ Private (P2P) long-range wireless network. It acts as a bridge between the RS-485 bus and the LoRa™ Private (P2P) network, eliminating the need for physical cabling between master and slaves. Its compact design, suitable for DIN rail mounting (1 module), enables a straightforward installation adaptable to multiple environments.
This solution simplifies installation, reduces costs, and enables coverage of hard-to-access areas or places without network infrastructure. Each gateway can manage up to 32 Modbus RTU devices connected locally and supports an unlimited number of Bridge LR gateways distributed over the LoRa™ Private (P2P) network.
Each gateway operates as a Modbus slave with its own identifier, allowing direct and seamless integration with the master system while adhering to network size limitations and other specifications of the Modbus standard Protocol.
Key Features
Wireless radio communication with LoRa™ Private (P2P) protocol.
Serial RS-485 Communication for Modbus RTU with the master.
Remote configuration.
Detachable external antenna.
Operation as a Modbus slave with its own identifier in the network.
Technical Specifications
AC power supply
Bridge LR PSAC AC power supply
Nominal voltage
110 … 264 V ~
Frequency
47 … 63 Hz
Consumption
2.5 … 4.5 VA
Installation category
CAT III 300 V
Radio communication
Bridge LR PSAC Radio communication
Band
ISM band 868 MHz (9 channels)
Serial communication
Bridge LR PSAC Serial communication
Technology / Type
RS-485
Communication Network
Bridge LR PSAC Communication Network
Protocol
Modbus RTU | LoRa™ Private (P2P)
User interface
Bridge LR PSAC User interface
LED
3 LEDs
Environmental characteristics
Bridge LR PSAC Environmental characteristics
Working temperature
-10 … +60 °C
Relative humidity (without condensation)
5 … 95%
Protection class
IP20
Mechanical characteristics
Bridge LR PSAC Mechanical characteristics
Envelope
Plastic UL 94 – V0 self-extinguishing
Fastening
DIN rail
Weight (kg)
0,08
Standards
Bridge LR PSAC Standards
Standards
EN 61010-1, EN 61000-6-2, EN 61000-6-4
Electrical safety, maximum height (m)
2000
Electrical safety
Bridge LR PSAC Electrical safety
Insulation
Double-insulated electric shock protection class II (IEC 61010-1)
Radio communication – Antenna
Bridge LR PSAC Radio communication – Antenna
Type
Tiltable omnidirectional SMA antenna
Applications
Due to their wireless architecture and extended range, Bridge LR are ideal for distributed installations or difficult-to-access locations where wiring is impractical or costly. Typical applications include:
– Monitoring in industrial buildings with cabling limitations.
– Network extensions Modbus in existing installations without requiring civil works.
– Consumption refactoring in multi-user spaces such as hotels, coworking spaces, campgrounds, marinas, etc.
– Control of remote pumping stations in irrigation or potable water networks.
– Management of sensors or devices in farms, greenhouses, or rural installations lacking 4G or internet connectivity.
– Monitoring of photovoltaic strings in solar fields.
Need more detailed information?
View the official product documentation, manuals and technical resources.
