--- product_id: 406082548 title: "DTECH Serial to Ethernet Converter Adapter RS232 RS422 RS485 to TCP IP Device Server Supports DHCP DNS Modbus RTU/TCP 10/100M Power Over Ethernet POE" brand: "dtech" price: "S$120" currency: SGD in_stock: true reviews_count: 5 category: "Dtech" url: https://www.desertcart.sg/products/406082548-dtech-serial-to-ethernet-converter-adapter-rs232-rs422-rs485-to store_origin: SG region: Singapore --- # Power over Ethernet (PoE) support 10/100M Ethernet, TCP/UDP modes 12V-70V wide voltage input DTECH Serial to Ethernet Converter Adapter RS232 RS422 RS485 to TCP IP Device Server Supports DHCP DNS Modbus RTU/TCP 10/100M Power Over Ethernet POE **Brand:** dtech **Price:** S$120 **Availability:** ✅ In Stock ## Summary > 🌟 Power Your Legacy Devices Into The Future — Connect, Control, Conquer! ## Quick Answers - **What is this?** DTECH Serial to Ethernet Converter Adapter RS232 RS422 RS485 to TCP IP Device Server Supports DHCP DNS Modbus RTU/TCP 10/100M Power Over Ethernet POE by dtech - **How much does it cost?** S$120 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/406082548-dtech-serial-to-ethernet-converter-adapter-rs232-rs422-rs485-to) ## Best For - dtech enthusiasts ## Why This Product - Trusted dtech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Dual-Port Powerhouse:** Simultaneously operate RS232 and RS485 ports with PoE support for streamlined, clutter-free installations. - • **Blazing Fast Data Rates:** Baud rates from 300 bps up to 921,600 bps ensure lightning-quick, reliable communication. - • **Robust Industrial-Grade Design:** Solid steel enclosure with wide voltage input (12V-70V) and ESD protection built for demanding environments. - • **Versatile Network Compatibility:** Supports DHCP, Dynamic DNS, and four working modes (TCP Client/Server, UDP Client/Server) for ultimate flexibility. - • **Seamless Serial-to-Ethernet Bridge:** Effortlessly connect RS232/422/485 devices to your network with bi-directional transparent transmission. ## Overview The DTech Serial to Ethernet Converter Adapter is a rugged, industrial-grade device server that converts RS232, RS422, and RS485 serial data into TCP/IP Ethernet packets. Supporting 10/100M Ethernet with full/half duplex, DHCP, Dynamic DNS, and Modbus RTU/TCP protocols, it offers flexible network modes (TCP/UDP client/server) and baud rates up to 921,600 bps. With wide voltage input (12V-70V), PoE capability, and dual serial ports operating simultaneously, it’s ideal for remote monitoring, POS, ATM, and security systems requiring reliable, long-distance serial device networking. ## Description Serial RS232/RS485/RS422 to TCP/IP Ethernet Device Server If you are trying to connect a serial device that is not close to a local computer, here is a rugged powered serial to ethernet device server for you to remotely access, control, and manage serial port device over TCP/IP network easily, regardless of the distance between the server and client computer. Computer networking serial server supports RS-232 and RS-485 working Independently at the same time, e.g. RS232 and RS485, or RS232 and RS422. (can’t do RS422 and RS485 at the same time) Dual Serial port server is well constructed with compact and protective solid steel enclosure for tabletop, wall mount or DIN rail mounting Important: pls make sure the IP of computer and our device server is in the same network segment, so it can work. RS-232, RS-485/422 3 in 1 serial port to 10/100 Base self-adaptive Ethernet interface (compatible with 802.3 protocol) full duplex RS422 and half duplex RS485 data communication Built-in Ethernet media transport layer (MAC) and physical layer (PHY) Support IPV4, not for IPV6 Baud rate: 300 - 921600 bps Modbus Gateway: Bi-directional Modbus RTU to Modbus TCP TCP Server, UDP Server, TCP Client, UDP Client working modes DHCP (Dynamic Host Configuration Protocol) Automatically obtain IP address, Dynamic DNS domain name access Power Option: external power adapter AC to DC, or PoE (power over Ethernet, pin 4/5 and 7/8) Electrostatic protection ESD: ±5kV wide voltage input range 12V～70V, output 1000mA Appliances ATM terminals, Credit card and check verification system, Data collection, Gas pump, Industrial and medical remote monitoring system, Point-of-sale terminal, Remote diagnostic, Remote metering, Security system, Ticketing/Vending/gaming machine, ... What’s Included: 1x Dual Serial Device Server 1x Power Supply 1x 9 pin Serial Cable Review: Not recommended unless for short term - Well made and easy to connect initially, but will not stay connected and has to be rebooted continuously. The user manual is useless as it is printed too small to be read. Find the user manual online and zoom. It doesn't have a webgui for configuration. You must use a proprietary .exe to configure. If using for Modbus protocol, you must use ModbusTCP. ModbusRTU will not work. I used it short term to connect to field equipment until the final equipment arrived, and now I keep it as a spare. Review: Seems to be good, but time will tell! - Was looking to convert from a linux computer handling our serial to ethernet connections to device servers. I have a lantronix and a Moxa, but wanted to try out something less expensive. Setup was a little weird as there is no web interface, you have to download a configuration tool, to talk to the device. The link is a QR code on a card in the box. Default IP is 192.168.1.200 but you can change that once you are into the config tool. After I figured that out, I was able to make the correct configurations for each port. I am running our buildings HVAC system and access control system and it appears to work. I will update if it fails or if i have to reset it, because that would be a non-starter for me. One interesting thing to note is the specs say the device server support's POE of 802.3. Technically it does, but not 802.3af (normal POE), it operates off of passive POE, presumably to save cost. Took 1 star off for that, though it does list the POE pinout as pins 4\5 and 7\8 which is passive POE not 802.3af. UPDATE 2022-5-17 - I am using the RS-232 and RS-485 port and everything is still functioning. ## Features - Bi-directional transparent transmission between serial data and Ethernet Packets: 3 in 1 Serial Device Server is designed with an RS232, RS422, or RS485 serial interface to a local area network to transmit serial data over Ethernet (TCP/IP) - Serial server box supports DHCP and Dynamic DNS function, 4 kinds of working mode: TCP Client、TCP Server、UDP Client and UDP Server; bidirectional Modbus RTU/TCP - Supports 10M/100M, full duplex / half duplex self-adaptive Ethernet interface (compatible with 802.3 protocol); baud rate ranges from 300 bps to 921600 bps; supports IPV4 - Wide voltage input 12V-70V; comes with a 12V power adapter, also supports POE (power over Ethernet, on pin 4/5 and 7/8 of POE switch); TX and RX indicators for easy troubleshooting - Dual serial port server supports RS-232 and RS-485 working at the same time, ideal for Industrial and medical remote monitoring system, ATM terminals, computer networking, POS, door controller, Data collection, security system, etc. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08M42FL5W | | Best Sellers Rank | #28,623 in Computers ( See Top 100 in Computers ) #83 in Serial Adapters | | Brand | DTECH | | Color | Black | | Colour | Black | | Compatible Devices | ATM Terminals, Point-of-sale Terminals, Security Systems | | Compatible devices | ATM Terminals, Point-of-sale Terminals, Security Systems | | Connector Type | RJ45 Connector, RS232 Connector, RS422 Connector, RS485 Connector | | Connector type | RJ45 Connector, RS232 Connector, RS422 Connector, RS485 Connector | | Current Rating | 1 Amps | | Customer Reviews | 3.3 out of 5 stars 14 Reviews | | Finish | Matte | | Finish type | Matte | | Input Voltage | 12 Volts | | Item Weight | 0.39 Kilograms | | Manufacturer | DTech | | Mfr Part Number | IOT9031 | | Model Number | IOT9031 | | Nominal Power | 12 Watts | | Number of Items | 1 | | Number of Ports | 3 | | Package Quantity | 1 | | Power Plug Type | Type A - 2 pin (North American & Japanese) | | Specific Uses For Product | Industrial and medical remote monitoring systems, ATM terminals, computer networking, POS systems, door controllers, data collection, security systems | | Specific uses for product | Industrial and medical remote monitoring systems, ATM terminals, computer networking, POS systems, door controllers, data collection, security systems Specific uses for product Industrial and medical remote monitoring systems, ATM terminals, computer networking, POS systems, door controllers, data collection, security systems See more | | UPC | 714131653331 | | Unit Count | 1.0 Count | | Warranty Type | 1 year warranty | ## Product Details - **Brand:** DTECH - **Colour:** Black - **Compatible devices:** ATM Terminals, Point-of-sale Terminals, Security Systems - **Connector type:** RJ45 Connector, RS232 Connector, RS422 Connector, RS485 Connector ## Images ![DTECH Serial to Ethernet Converter Adapter RS232 RS422 RS485 to TCP IP Device Server Supports DHCP DNS Modbus RTU/TCP 10/100M Power Over Ethernet POE - Image 1](https://m.media-amazon.com/images/I/61qpnW+zxhL.jpg) ## Questions & Answers **Q: Rs232 is working. however i can't get rs485 to work. i tried all different configurations and still couldn't get it work.any suggestions?** A: One thing that I found is that the RS232 is on Port 2 so presumably Port 1 is the RS485. **Q: Is IPV6 supported?** A: No, this powered serial device server box can't support IPV6, it supports IPV4. **Q: Has anyone been able to power it via poe? i have a unifi poe switch that powers everything, but this device.** A: Hi, the powered serial to Ethernet device server supports POE power supply, on pin 4/5 and 7/8 of POE switch. If any inconvenience caused, we're truly sorry for that, and if need any further assistance, you may contact us directly via the order page's "contact seller" button. And here some files for your reference to use the adapter, https://app.box.com/s/i6y6on52q588huvukn1uz6dy162ossiq **Q: /What is the operating temperature? there is no this important parameter. how can i buy it?** A: Hi, the serial to Ethernet adapter's operating temperature is from -4℉ to 176 ℉, relative humidity is from 5% to 95%. ## Customer Reviews ### ⭐⭐ Not recommended unless for short term *by A***R on 26 January 2026* Well made and easy to connect initially, but will not stay connected and has to be rebooted continuously. The user manual is useless as it is printed too small to be read. Find the user manual online and zoom. It doesn't have a webgui for configuration. You must use a proprietary .exe to configure. If using for Modbus protocol, you must use ModbusTCP. ModbusRTU will not work. I used it short term to connect to field equipment until the final equipment arrived, and now I keep it as a spare. ### ⭐⭐⭐⭐ Seems to be good, but time will tell! *by D***T on 4 May 2022* Was looking to convert from a linux computer handling our serial to ethernet connections to device servers. I have a lantronix and a Moxa, but wanted to try out something less expensive. Setup was a little weird as there is no web interface, you have to download a configuration tool, to talk to the device. The link is a QR code on a card in the box. Default IP is 192.168.1.200 but you can change that once you are into the config tool. After I figured that out, I was able to make the correct configurations for each port. I am running our buildings HVAC system and access control system and it appears to work. I will update if it fails or if i have to reset it, because that would be a non-starter for me. One interesting thing to note is the specs say the device server support's POE of 802.3. Technically it does, but not 802.3af (normal POE), it operates off of passive POE, presumably to save cost. Took 1 star off for that, though it does list the POE pinout as pins 4\5 and 7\8 which is passive POE not 802.3af. UPDATE 2022-5-17 - I am using the RS-232 and RS-485 port and everything is still functioning. ### ⭐ Doesn't work, won't make connection as client nor accept connection as server *by B***S on 20 January 2024* I purchased this to interface with my hvac system that uses rs485. But it is JUNK - This review will contain some technical details as if you are purchasing this I assume you know something about these type of devices. I'll start by saying the manual is printed in miniscule fonts and is a booklet that is 3"x2" and practically unreadable without a magnifying glass or microscope. Looking for the manual online is also a single page scan of the entire 18 page manual that you have to Zoom in on and 1/2 of it's not even in the online manual. This device DOES NOT HAVE A WEB CONFIGURATION FEATURE! You must configure it using a windows based exe. This does allow you to scan for it on your network and configure the ip which is about the only thing that is nice about it. After hooking it up and running the configuration program the device would not accept a connection as a tcp server no matter what port I tried. A Packet capture using Wireshark showed it just sends an RST packet on attempt to connect to the server port configured in the gui. nmap also verifies it is NOT LISTENING on the port. I also tried configuring it as a client and pointing it at a host running netcat listening for connections while running Wireshark it NEVER attempted to connect. I am returning this and cannot recommend this product. DO NOT BUY!!! ## Frequently Bought Together - DTECH Serial to Ethernet Converter Adapter RS232 RS422 RS485 to TCP IP Device Server Supports DHCP DNS Modbus RTU/TCP 10/100M Power Over Ethernet POE - Usr-Tcp232-410S RS232 / RS485 Serial to Ethernet Adapter/IP Device Server Ethernet Converter Support DHCP/DNS (1) - USR-TCP232-302 Tiny Size RS232 to TCP IP Converter Serial RS232 to Ethernet Server Module Ethernet Converter Support DHCP/DNS --- ## 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.sg/products/406082548-dtech-serial-to-ethernet-converter-adapter-rs232-rs422-rs485-to](https://www.desertcart.sg/products/406082548-dtech-serial-to-ethernet-converter-adapter-rs232-rs422-rs485-to) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-10-20*