--- product_id: 77775542 title: "Double Serial Device RS232 RS485 RS422 Ethernet Server Modbus to MQTT lot Gateway Multi-Host Polling USR-N520 H7 Version" brand: "pusr" price: "Bs.2905" currency: BOB in_stock: true category: "Pusr" url: https://www.desertcart.bo/products/77775542-double-serial-device-rs232-rs485-rs422-ethernet-server-modbus-to store_origin: BO region: Bolivia --- # 400MHz Cortex-M7 CPU speed Multi-protocol Ethernet support Dual independent serial ports Double Serial Device RS232 RS485 RS422 Ethernet Server Modbus to MQTT lot Gateway Multi-Host Polling USR-N520 H7 Version **Brand:** pusr **Price:** Bs.2905 **Availability:** ✅ In Stock ## Summary > 🚀 Connect Smarter, Scale Faster — The Industrial Gateway You Can’t Afford to Miss! ## Quick Answers - **What is this?** Double Serial Device RS232 RS485 RS422 Ethernet Server Modbus to MQTT lot Gateway Multi-Host Polling USR-N520 H7 Version by pusr - **How much does it cost?** Bs.2905 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/77775542-double-serial-device-rs232-rs485-rs422-ethernet-server-modbus-to) ## Best For - pusr enthusiasts ## Why This Product - Trusted pusr brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Cloud-Ready & Secure:** Built-in SSL/TLS encryption and compatibility with AWS IoT, Alibaba Cloud, and more keep your data safe and future-proof. - • **Dual-Port Powerhouse:** Two serial ports working independently with dual socket backup for unmatched reliability and flexibility. - • **Blazing Fast Cortex-M7 Core:** Experience ultra-responsive data handling at 400MHz for seamless industrial communication. - • **Rock-Solid Industrial Grade:** Rugged metal housing with IP30 protection and -40°C to 85°C operation ensures nonstop performance in harsh environments. - • **Universal Protocol Compatibility:** Supports TCP/UDP/HTTP/MQTT and Modbus RTU/TCP for effortless integration across your network. ## Overview The USR-N520 H7 Version is a high-performance dual-port serial-to-Ethernet gateway powered by a 400MHz Cortex-M7 CPU. It supports multiple protocols including Modbus RTU/TCP, MQTT, TCP/UDP, and HTTP, enabling seamless data conversion and transmission. Designed for industrial environments, it features rugged IP30 metal housing, wide voltage input, and advanced security with SSL/TLS encryption. Its dual independent serial ports with dual socket backup ensure maximum reliability and flexibility, while cloud compatibility with major IoT platforms future-proofs your connectivity. ## Description USR-N520 is 2-port serial to Ethernet converter. lt adopts Cortex-M7 solution,which has a main frequency up to 400MHz, powerful performance , fast transmission speed, and high reliability. compatible with TCP/P stack, built in hardware and sofware watchdog and a variety of keepalive mechanisms,USR-N520 keeps online all the time. Product Features: lt compatible with TCP Client, TCP Server, UDP Client, UDP Server and HTTPD Client working modes, achieves data transparent transmission via simple configuration. Supports 2 serial ports working independently. Supports 5-36V wide voltage input, with reverse polarity protection. Supports Modbus RTU to Modbus protocol conversion. Supports keepalive mechanism to quickly detect the dead connections and reconnect. Supports hardware watchdog, automatically restarts when the device goes down. Provides remote serial access over the Internet for industrial serial devices. 10/100Mbps Ethernet port and support Auto MDIMDIX. Software selectable RS-232/422/485 3-in-1 serial port(N5X0 models). Rugged metal housing with lP30 protection for wall or optional DIN-Rail mount. Built-in 15KV ESD serial port protection. Supports a wide industrial operating temperature,-40¡æ~85¡æ Flexible serial port data framing setting, which can satisfy user's various demands for data packets segmentation. Versatile operation modes: compatible with TCP Server, TCP Client, UDP, HTTP client, Websocket server. Support virtual COM ,COM Port Redirector USR-VCOM(win¡¤dows). Firmware upgrading via Web Browser and Windows configuration tool Easy-to-use Win¡¤dows configuration tool for auto discovery, multiple device setting and monitoring. Choice of power input: AC-DC adapter(DC Jack) or DC direct(Terminal Block). High security via certificate verification SSL/TLS encryption for secure data transmission,HTTPS,compatible with TCPS,MQTTS. Support modbus RTU master,edge computing, modbus gateway,MQTT gateway. Cloud support: Compatible with MaTT via AWS lOT, Thingsboard, Alibaba Cloud, EMQX, Tuya,Cumulocity loT and so on. ## Features - The USR-N520 Supports Modbus RTU Master for retrieving field site data from serial meters. After collecting data, users can convert serial data to MQTT json format data, allowing users to get field site data while save space and time. - New Solution: New ARM core, Cor¡¤tex-M7 solution, which has a main frequency up to 400MHz, compatible with TCP/lP protocol stack. lt has low latency and strong scalability, stable and reliable. - USR-N520 compatible with TCP Client, TCP Server, UDP Client, UDP Server and HTTPD Client working modes, achieves data transparent transmission via simple configuration. Supports 2 serial ports working independently. - Modbus Gateway: It compatible with Modbus TCP and Modbus RTU protocol mutual conversion, multi-host poling function. - Dual Sockets: Each serial port supports connecting to two different servers at the same time. Two sockets are mutually backed up, providing higher reliability and better flexibility. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07G56LBQJ | | Best Sellers Rank | #49 in Computer Networking Device Servers | | Brand | PUSR | | Compatible Devices | PC | | Connector Type | RS485 | | Customer Reviews | 3.2 3.2 out of 5 stars (10) | | Finish | Transparent | | Input Voltage | 36 volts | | Item Dimensions | 8.27 x 5.91 x 1.97 inches | | Item Weight | 0.65 kg | | Manufacturer | PUSR | | Mfr Part Number | USR-N520 | | Model Number | USR-N520 H7 Version | | Number of Items | 1 | | Number of Ports | 2 | | Package Quantity | 1 | | Specific Uses For Product | PC | | UPC | 723980935284 661787210442 740030459477 703063198997 | | Unit Count | 1 Count | | Warranty Description | 1 | ## Product Details - **Brand:** PUSR - **Compatible Devices:** PC - **Connector Type:** RS485 - **Item dimensions L x W x H:** 8.27 x 5.91 x 1.97 inches - **Specific Uses For Product:** PC ## Images ![Double Serial Device RS232 RS485 RS422 Ethernet Server Modbus to MQTT lot Gateway Multi-Host Polling USR-N520 H7 Version - Image 1](https://m.media-amazon.com/images/I/61oiznPtgoL.jpg) ## Questions & Answers **Q: Does the device come with two DB9 screw termial headers?** A: USR-N520 supports DB9 male port. Not terminal type.Meanwhile, we will provide RS232 to RS485/RS422 convertor. **Q: Is a power supply included in the box?** A: None in my boxes. Can run off 12-24v dc with no problems. **Q: Does it have a filter to ignore lines of data?** A: Not that i know of. **Q: Once this device is configured, can i ssh into it to be able to access either one of the rs-232 ports behind it? (console into 2 network router)** A: USR-N520 does not support SSH, you can access the RS232 port behind it via TCP connection. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.bo/products/77775542-double-serial-device-rs232-rs485-rs422-ethernet-server-modbus-to](https://www.desertcart.bo/products/77775542-double-serial-device-rs232-rs485-rs422-ethernet-server-modbus-to) --- *Product available on Desertcart Bolivia* *Store origin: BO* *Last updated: 2026-09-29*