LRA-900
LRA-900
LoRa Radio Modem with 1-port RS-232/485 (Asia Only)
Features
- LoRa (Long Range) transmission technology
- Transparent transmission mode
- 32 RF channels (Frequency band : 864~ 871.5MHz, 915~ 922.5MHz)
- GPS: 32 channels with All-In-View tracking
- RF baud rates: 10,000 ~ 250 bps
- Provides baud rates from 1200 to 115200 bps for both the RS-232 and RS-485 interfaces
- ESD protection: Contact +/-4 kV
- Isolation: 3000 VDC for DC-to-DC, 2500 Vrms using a photocoupler
- DIN-Rail mountable
- Operating temperature, -25 °C ~ +75 °C
- Introduction
- Application
- Specification
- Download
- Get A Quote
Introduction
The LRA-900 is a RS-232/485 to radio device designed for remote communication operating in a transparent way and exploiting the physical layer of LoRa (Long Range) transmission technology. The LRA-900 provides a maximum line of sight (LOS) transmission distance of 1500 meters at an RF bit rate less than 10 kbps. In order to overcome the interference that may be encountered in harsh environments, the LRA-900 allows the RF transmission bit rate to be configured to a minimum of 250 bps, enhancing the capability of the modem to resist noise and other interference. Additionally, the RF channels and Group IDs are adjustable, which is helpful to avoid interference encountered when two LRA-900 networks are adjacent. The RF channels and the Group IDs can be configured in order to distinguish and control the different LRA-900 networks.
| LoRa Converter | ||||
|---|---|---|---|---|
| Model | Interface | Transmit Power | Radio Frequency | Transmission Distance (LoS) |
| LRA-900 | 1 × RS-232, 1 × RS-485 | 15 dBm | 864 ~ 871.5 MHz, 915 ~ 922.5 MHz (32 frequencies) |
1500 m |
| LRA-900-E | 1 × Ethernet | 15 dBm | 864 ~ 871.5 MHz, 915 ~ 922.5 MHz (32 frequencies) |
1500 m |
Application
Specification
| EMS Protection | |
|---|---|
| EFT (IEC 61000-4-4) | +/- 1 kV |
| ESD (IEC 61000-4-2) | +/- 4 kV Contact |
| Surge (IEC 61000-4-5) | +/- 1 kV |
| LED Indicators | |
|---|---|
| Status |
1 × RF Tx 1 × RF Rx 1 × Power |
| RF | |
|---|---|
| Antenna | 2 dBi Omnidirectional Antenna |
| Baud Rate | 10,000 ~ 250 bps |
| Configuration | via Utility tool |
| Group ID | 0 ~ 255 |
| Modulation | LoRa |
| Protocol | Transparent transmit |
| Radio Frequency |
864 ~ 871.5 MHz, 915 ~ 922.5 MHz (32 channels, recommended: 868 ± 4 MHz) |
| Temporary Buffer Size | 200 bytes |
| Transmission Power | 15 dBm (Max.) |
| Transmission Distance (LoS) | Up to 1500 m (10 kbps, free field conditions) |
| COM Ports | |
|---|---|
| Ports |
1 × RS-232 1 × RS-485 |
| Baud Rate | 1200 ~ 115200 bps |
| Parity | None, Even, Odd |
| Data Bit | 5, 6, 7, 8 |
| Power | |
|---|---|
| Consumption | 1 W |
| Mechanical | |
|---|---|
| Casing | Plastic |
| Dimensions (mm) | 108 × 84 × 33 (W × L × H, antenna not included) |
| Installation | DIN-Rail |
| Environment | |
|---|---|
| Operating Temperature | -25 ~ +75 °C |
| Storage Temperature | -30 ~ +80 °C |
| Humidity | 10 ~ 90% RH, Non-condensing |
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