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Rectangular metal radio module with antenna connector and terminal blocks

NaSR

NaSR E90-DTU(900SL33) 33dbm 16KM LoRa Wireless Radio

SKU CH-1KEK-GEDQG

Long-range LoRa radio with RS-232 and RS-485 interfaces, 33 dBm output, 16 km range, data encryption and 8–28 V supply

  • Long-range wireless link up to 16 km line-of-sight
  • Operates on licence-free ISM bands at 868.125 MHz and 915.125 MHz
  • 33 dBm transmit power with multi-level adjustment up to 2 W
  • AES data encryption with configurable packet length up to 240 bytes
  • Wide 8 V to 28 V supply range with RS232 and RS485 interfaces

Industrial LoRa Radio for Long-Range Modbus Networks

The NaSR E90-DTU(900SL33) is a 33 dBm LoRa transceiver built for industrial telemetry and Modbus systems. It operates on the licence-free 868.125 MHz and 915.125 MHz ISM bands with a stated range of 16 km under ideal conditions. The unit targets integrators who need robust wireless links for remote sensors, meters or RTUs across large sites.

Straightforward Wiring with RS232 or RS485

The radio connects through standard RS232 and RS485 serial ports and accepts a wide 8 to 28 V supply range. Configuration uses AT commands and firmware can be updated over the serial interface. Common issues include exceeding the 240-byte packet limit for Modbus frames and neglecting the LBT duty-cycle restrictions that apply in dense RF environments.

Handles Modbus Payloads and Multi-Hop Relaying

Each packet carries up to 240 bytes, which covers typical Modbus requests and responses without fragmentation. Transmit power reaches 2 W and is adjustable in steps to meet regional limits. The built-in relay function extends coverage beyond the single-hop range, but latency and hop-count limits make it unsuitable for real-time control loops or high-throughput streaming.

Highlights

  • Long-range wireless link up to 16 km line-of-sight
  • Operates on licence-free ISM bands at 868.125 MHz and 915.125 MHz
  • 33 dBm transmit power with multi-level adjustment up to 2 W
  • AES data encryption with configurable packet length up to 240 bytes
  • Wide 8 V to 28 V supply range with RS232 and RS485 interfaces

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the E90-DTU(900SL33) is transmitting at 33dbm after setup?

Use the AT command interface to query the current transmit power setting and verify it reads 33dbm; the RSSI indicator on the module will also show received signal strength during test transmissions.

What interfaces are included on the E90-DTU(900SL33) and what must I provide separately?

The unit provides RS232 and RS485 serial ports for data and firmware upgrades; you must supply an 8–28V power source and antennas for the 868.125MHz or 915.125MHz bands.

Which frequency version should I choose for the E90-DTU(900SL33) in Europe versus North America?

Select the 868.125MHz setting for European ISM band compliance or 915.125MHz for North American ISM band use; both are supported on the same hardware.

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