The PUSR USR-DR404 is an industrial-grade DIN Rail RS485 to WiFi and Ethernet serial device server, supporting bidirectional transparent data transmission between RS485 serial devices and IEEE 802.11 a/b/g/n wireless or 10/100M Ethernet networks. It accepts a wide power supply input of 5–36V DC, supports MQTT, TCP, UDP and Modbus RTU-to-TCP protocols, and features ESD and EFT protection for harsh industrial environments. This unit is firmware version V2.0.0 and is presented in its original packaging with antenna, DIN rail bracket, and power terminal block included. Ideal for connecting legacy RS485 serial devices (PLCs, sensors, meters) to modern IP-based SCADA or IIoT systems.
| Equipment type | RS485 to WiFi/Ethernet Converter (DIN Rail Serial Device Server) |
| Manufacturer | PUSR (USR IOT Technology) |
| Model number | USR-DR404 |
| Serial number | FFA010409E0001 |
| Rated specs | RS485 to 802.11 a/b/g/n WiFi & 10/100M Ethernet, DC 5-36V, 1x RS485 port, 1x Ethernet port, Baud rate 300-230.4Kbps, DIN Rail mount, V2.0.0 |
| Estimated year | 2023 |
| Condition | Appears to be in new or near-new condition — unit is still in its original foam-lined retail packaging with accessories (antenna, DIN rail bracket, terminal block) present. No visible damage, scratches, or wear. Box shows minor scuffing consistent with normal storage/shipping. |
⚠ Shipping is not included in the listed price.
This is second-hand equipment being sold as-is. Local pickup is available at no charge. For courier/freight delivery, please contact us for a shipping quote before completing your order — calvin.coetzee@batterypowered.co.za / +27 72 370 9080.
This is second-hand equipment being sold as-is. Local pickup is available at no charge. For courier/freight delivery, please contact us for a shipping quote before completing your order — calvin.coetzee@batterypowered.co.za / +27 72 370 9080.
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