The Ebyte EWD95M-900NW22(485) is an 868MHz 22dBm 2.5km LoRa MESH micro DIN-rail DTU featuring conformal coating, 62.5k air rate, 460800bps serial baud rate, and RS485 interface.
| Parameter Name | Parameter Value | Technical Details |
|---|---|---|
| Operating Frequency | 850.125 - 929.125 MHz | Default 868.125 MHz, Sub-GHz band |
| Transmitting Power | 22 dBm | Max RF output power approx. 160mW |
| Communication Distance | 2.5 km | Single-hop line-of-sight reference range |
| Networking Topology | LoRa MESH | Supports automatic routing & multi-hop extension |
| Air Rate & Baud Rate | Air: 62.5K; Serial: Up to 460800 bps | High-speed serial communication support |
| Environmental Protection | Three-Proof Conformal Coating | Anti-Fungal, Anti-Humidity, Anti-Salt Spray |
| Hardware Mounting & Interface | Micro DIN-Rail; RS485 | Guide rail installation structure |
| Dimensions & Weight | 102 x 28 x 28.5 mm; 32g | Ultra-compact micro-rail DTU enclosure |
Practical Application Scenarios
1. Multi-Node Coastal Marine and Port Asset Monitoring
In harsh maritime or coastal industrial environments, high humidity and salt spray rapidly corrode unsealed electronic hardware. Featuring an anti-fungal, anti-humidity, and anti-salt spray conformal-coated PCB inside a compact micro DIN-rail enclosure, the EWD95M-900NW22(485) operates reliably on dockside distribution panels and shipboard RS485 sensor nodes without circuit degradation.
2. Large-Scale Municipal Smart Streetlighting Mesh Network
Urban streetlighting control requires non-line-of-sight data delivery across multiple city blocks where single-hop RF connections fail. Leveraging decentralised LoRa MESH networking with automatic routing, each micro DTU installed inside street cabinet control boxes acts as both an edge node and a relay, passing Modbus commands seamlessly across adjacent nodes to extend coverage far beyond the 2.5km single-hop limit.
3. Underground Utility Tunnel and Substation Distributed Telemetry
Subterranean pipe galleries and high-voltage electricity cabinets pose severe structural blockages and high electromagnetic interference. Deploying the EWD95M-900NW22(485) alongside Ebyte Modbus I/O modules and power meters allows field engineers to construct a self-healing multi-hop serial wireless network, guaranteeing continuous telemetry reporting back to the central monitoring gateway.
FAQ Section
1. How does the LoRa MESH self-healing routing protocol function in this DTU?
The DTU utilizes an autonomous LoRa MESH routing algorithm where each node dynamically evaluates network link quality. If an intermediate node goes offline, adjacent units automatically recalculate optimal multi-hop paths to re-route serial packets to the destination gateway without manual network reconfiguration or host PLC intervention.
2. Can the high serial baud rate of 460800bps cause packet loss during wireless transmission?
The unit features internal high-capacity serial data buffering to manage speed mismatch between the 460800bps RS485 UART port and the maximum 62.5K RF air rate. This ensures transparent burst data handling and smooth packet transmission without buffer overflow under standard Modbus RTU polling schedules.
3. Is special programming required to configure Modbus RTU protocol transmission?
No specialized programming is required. The EWD95M-900NW22(485) natively supports Modbus RTU protocol transparent transmission. Field devices, PLCs, and SCADA masters simply send standard Modbus frames over the RS485 serial interface, and the DTU packages and routes them automatically across the LoRa MESH network.
