Best Rj45 Serial Adapters in 2026

Product name : DB9 Serial adapter; terminal wire range : 12-24AWG

Design : Screw Type;Total Size : 58 x 35 x 21mm/2.3" x 1.4" x 0.83"(L*W*H)

Cable Hole Dia. : 5mm/0.2'' 6mm/0.23'' 7mm/0.27'' 10mm / 0.4";Material : Metal,Electric Part

Converts standard, straight wired cables to null modem wiring

Null modem configuration with pin 9 open.

Slimline design reduces leverage strain on computer ports

Convert your DB9 male connector into an RJ45 female connector

Used for modular RS232 RS422 and RS485 connections

Can be used to make customized serial connections

HIGH QUALITY&DURABLE: Pure copper plated joints, fine solder joints, resistance to plug, and good contact to ensure high-quality, durability and a long life. The outer casing is made of environmentally friendly PP engineering material, which is soft and durable.

EASY TO USE: No welding required, 128 type environmental protection copper terminal design, no need for soldering iron and cumbersome tools, easy wiring. The housing is designed with a folding buckle for easy assembly and disassembly without tools.

HIGH COMPATIBILITY: It can connect all kinds of serial devices. Such as computer and tax control machine, digital camera,PLC, PDA, MODEM, set-top box, barcode machine, industrial instrumentation and other equipment for communication.

USB TO RS232 SERIAL – 5ft in length serial adapter. Connect legacy DB-9 serial communications devices to a modern computer with USB

EASY TEST - Easy test RS-232 host to device link. With a full LED, dual color display, tester output. This will make testing your connections with ease.

COMPATABILITY - With support on multiple OS platforms this makes our USB RS- 232 very versatile. Supported OS platforms are Windows 7, 8, 10, and 11 as well as Linux and MacOS 10.X

A simple, cost effective solution to process serial data communication between RS232 COM port devices over inexpensive cat5 cat6 RJ45 network cable

DB9 female to RJ45 modular adapter converts DB9 female connector into an RJ45 female connector (DB9 female - RJ45 Female pinout: 1-1, 2-2, 3-3, 4-4, 5-5, 6-6, 7-7, 8-8, 9-x)

A pair of DB9 to RJ45 socket coupler can be used a extender to extend rs232 serial signals up to 65ft

This is a serial RS232 to Ethernet server, used for data transparent transmission. USR-TCP232-302 is a low-cost serial device server,whose function is to realize bidirectional transparent transmission between RS232 and Ethernet. USR-TCP232-302 is internally integrated with TCP/IP protocol. User can apply it to device networking communication.

Support DHCP, automatically obtain an IP address and query IP address through serial setting protocol, Support DNS function, Set parameters through webpage, Upgrade firmware via network.

Auto-MDI/MDIX, RJ45 port with 10/100Mbps, Serial port baud rate from 600 bps to 230.4 Kbps, Check bit of None, Odd, Even, Mark and Space.

Dual Serial Device Server: Cpu: Cortex-M4 120Mhz, Serial RS485 & RS232 to Ethernet Server, 2 Serial Ports: 1 Port is RS232, 1 Port is RS485, 1 RJ45 Ethernet Port. Support RS232 & RS485 Working at The Same Time.

Data Link Protocol: Ip£¬Tcp£¬Udp£¬Dhcp£¬Dns£¬Http£¬Arp£¬Icmp£¬Web Socket£¬Httpd Client.

Speed: 10 / 100 Mbps, Mdi / Mdix Cross Direct Automatic Switching, Baud Rate: Rs-232£º600Bps ~ 230. 4Kbps£¬Rs-485£º600Bps ~ 1Mbps; 1.5Kv Electromagnetic Isolation, Shell Isolation Protection; Anti-Static 2Kv, Lightning Protection.

DB9 (RS232) to RJ45 adapter for bidirectional conversion of TCP/IP network interfaces, transmitting signals between your DB9 ports via CAT5E/CAT6 RJ45 network cables.Special Note: Usually this product needs to be used in pairs.

Simple operation, cost saving, plug and play, no need to drive.Note:This product is only an adapter for exptending, not a console adapter.

High-speed, secure data transmission, double-shielded standard, ensuring signal transmission without interference, transmission signal up to 20M.

6ft DB9F to RJ45 Console Rollover cable

Equivalent to Cisco AIR-CONCAB1200, 72-3383-01

Connects a computer DB9M serial port to a RJ45 Cisco Console port

Industrial grade isolated RS232 to RS485 converter for High Speed data communication between DB9 serial COM port and RS-485/422 device (wired via RJ45 socket or 6 position terminal board)

Provides Power Supply Isolation (optical isolation voltage 2500Vrms 500DC continuity); RS-232 interface - 15kV ESD protection; RS485/422 end with each line of 600W lightning surge protection

Port-powered or by DC 9V-24V power adapter; LED indicators for troubleshooting - easy check in the status of power connection and balanced differential signal status

Please note: This is not EIA/TIA-561 or similar common pinout. These units can only be used when paired together. They cannot be used as you would any other similar adapter.Size:(15CM/6Inch) Color: Black Features:（2 per pack) DB9 Female to RJ45 Female cable and DB9 Male to RJ45 female cable

【DB9 to RJ45】DB9 (RS232) to RJ45 adapter for bidirectional conversion of TCP/IP network interfaces, transmitting signals between your DB9 ports via CAT5E/CAT6 RJ45 network cables.Special Note: Usually this product needs to be used in pairs.

Save money by using a CAT5 cable versus a DB9 cable.Makes running cables easier due to RJ45 being thinner.

ROLLOVER CABLE: Convert a standard Ethernet cable into a serial rollover cable for connecting to Cisco or other hardware that requires rolled cables. Create a rollover connection between a computer terminal and the RJ45 console port on a Cisco modem, router, firewall, switch or other serial-based device without having to buy new cabling.

BLUE MOLDING: This Cisco console rollover adapter features blue PVC molding for fast identification in a crowded switch or router and helps prevent the cable from becoming inadvertently disconnected.

COMMON USES: Connect devices like Cisco switches, routers or other hardware that require rolled cables to an Ethernet network. Change ports on a network device from straight-through to Cisco rollover

Convert your DB9 connector into an RJ45 female connector. Allows you to configure your own specific pinouts or make customized serial connections. You can create customized connections with terminals, serial printers, modems, POS and other serial devices.

RJ45 Pin Outs: 1-Blue, 2-Orange, 3-Black, 4-Red, 5-Green, 6-Yellow, 7-Brown, and 8-White.

High Compatibility: You can use these systems for computer-related equipment such as printers, mice, keyboards, networks, and modems.

【Bidirectional Transparent Transmission】This WiFi to Serial Converter Can Realize Bidirectional Transparent Transmission Between Rs232/Rs485 and Wifi, Wifi And Ethernet, Serial and Ethernet.

【Rugged Aluminum Housing】This Serial to WIFI Ethernet Device Server Delivers a Reliable Performance That Can Be Used in Almost Any Environment,Such As Operating Temp -40℃～ 85℃.

【Basic Function】Usr-W610 Supports Modbus Rtu to Tcp in Bi-directional, Modbus Polling.Supports Timing and Timeout Restart Function, Which Makes The System Run More Stable.Supports Web Server, Setup Software, Serial/Network AT Command to Configure Module.Support Web Page to Upgrade Firmware.

Convert your DB9 connector into an RJ45 female connector. Allows you to configure your own specific pinouts or make customized serial connections. You can create customized connections with terminals, serial printers, modems, POS and other serial devices.

RJ45 Pin Outs: 1-Blue, 2-Orange, 3-Black, 4-Red, 5-Green, 6-Yellow, 7-Brown, and 8-White.

High Compatibility: You can use these systems for computer-related equipment such as printers, mice, keyboards, networks, and modems.

<b>Dual Serial Device Server:</b> Cpu: Cortex-M4 120Mhz, Serial RS485 & RS232 to Ethernet Server, 2 Serial Ports: 1 Port is RS232, 1 Port is RS485, 1 RJ45 Ethernet Port. Support RS232 & RS485 Working at The Same Time.

<b>Speed: </b>10 / 100 Mbps, Mdi / Mdix Cross Direct Automatic Switching, Baud Rate: Rs-232º600Bps ~ 230. 4Kbps¬Rs-485º600Bps ~ 1Mbps; 1.5Kv Electromagnetic Isolation, Shell Isolation Protection; Anti-Static 2Kv, Lightning Protection.

Modbus Gateway: Modbus RTU to Modbus TCP / Modbus Pollinig

[Powerful Functional Design] Ethernet serial adapter is not only an RS485/RS232 to ethernet converter,but also is an serial to WiFi converters or wifi to ethernet adapter.It can realize the bi-directional transparent data transmission between RS232/RS485, WiFi and Ethernet. Through simple configuration via Web Server or setup software can assign working details, realize serial data and TCP/IP data package transparent transmission.Build-in routing function,support wired or WiFi networking method.

[Multiple Protection] WIFI to ethernet converter has passed EFT test, when there is instantaneous high current in the circuit (such as lightning, power switch, etc.), it can ensure that the device hardware is not damaged.Support electrostatic protection,prevent electrostatic damage the ethernet to wifi converter,such as dust electrostatic,electric arc environment.Built in Watchdog,ensure that the hardware circuit runs stably for 24 hours.

[Basic Function] Support RS232/RS485 to 802.11 a/b/g/n WLAN Serial Device Server.Support TCP Server/TCP Client/UDP Server/UDP Client/https Client mode.Support AP, STA, AP+STA.Support identity packet function, heartbeat packet function,Websocket function, timeout reset function and timing reset function.Support Web Server, setup software, serial/network AT command to configure module.Support hardware reload.Support usrlink.

RJ-45 interface for easier access to serial device.

FTDI FT232R chipset. More stronger and more reliable.

Real USB 2.0 specification compliant.

ACCESS SERIAL DEVICES REMOTELY - RS485 Serial device server transfer bidirectional transparent transmission of data between RS485 and Ethernet IP. It can configure and remotely manage RS485 serial devices on an IP network.Supports RS485 half duplex transmission, simple to set to work.

QUICKLY CONNECTS DEVICES TO THE INTERNET - The rs485 to ethernet converter supports 300 baud to a 230400bps data rate, connecting a RS485 serial device to the ethernet instantly.

MULTIPLE CONTROL MODES - Support Work Mode: TCP Server, TCP Client, UDP,VCOM.Support Auto-MDI/ MDIX, RJ45 Port with 10 / 100Mbps.Support web browser settings.

Bidirectional RS232 to RS485 RS422 converter converts RS-232 signals to RS-485 or RS-422 signal, cable can be connected to either a terminal block or an RJ45 network port

600W lightning surge protected for RS485/RS422 link and 15KV static protection for RS232 link, protects your value devices against high voltage

Powered serial adapter with TX, RX and power indicators enables you to easily know the status of sending or receiving data respectively (110/240V AC to 9V DC power supply included)

★【Industrial Serial Server】RS485 to RJ45 Ethernet Module for bi-directional transparent data transmission between RS485 and Ethernet, with rail-mount flame-retardant case design, supports 9~24V wide range power supply

★【Support Modbus Gateway 】Suitable for Modbus gridding upgrade, can be used with 3D configuration software, Support MQTT/JSON to Modbus, more flexible conversion between different protocols

★【Multi communication modes】Supports TCP server / TCP client / UDP mode / UDP multicast

Industrial RS232/RS485 to Ethernet Converter, Dual Serial Ports, which allows bi-directional transparent data transmission between RS232/RS485 and RJ45 port Ethernet, even at the same time, it can be configured via webpage.Easy-to-use, High-speed, Low-power, High-stability, Upgradable

M4 series 32-bit ARM processor with up to 120MHz frequency, fast speed, stable and reliable. 10/100M Auto-MDI/MDIX ethernet interface, regardless of cross-over or straight-through cable. Both RS232 and RS485 interface, allows to work independently at the same time, without interfering each other.

Configurable baudrate (600bps~230.4Kbps), supports five parity check options: None, Odd, Even, Mark, Space. Multi indicators, for monitoring communicating and working status. Available working modes: TCP Server, TCP Client, UDP Server, UDP Client, HTTPD Client (supports GET and POST).

RS485 to RJ45 Ethernet bi-directional transparent data transmission serial server, with POE function and electrical isolation, support rail-mount, easy to combine multi rail-mounted serial server together

Modbus gateway support, suitable for Modbus gridding upgrade, can be used with 3D configuration software. Multi communication modes, supports TCP server / TCP client / UDP mode / UDP multicast

MQTT/JSON to Modbus, more flexible conversion between different protocols. Multi hosts roll-polling support, different network devices will be identified and responsed respectively, no more crosstalk issue while communicating with multi network devices

Can realize data bidirectional transparent transmission between serial TTL and RJ45 Port. USR-TCP232-T2 is based on Cortex-M0 core. It has characters of low power, fast speed, and high efficiency.

Can transmit data transparently between TCP/IP and TTL, and it can also be applied in RS232/ RS485 by level shift circuit.

DHCP &DNS, automatically obtain an IP address and query IP address through serial setting protocol. Set parameters through webpage and serial AT command. Upgrade firmware via network. Auto-MDI/MDIX, RJ45 port with 10/100Mbps.

Connection : DB9 (RS232) female/male to RJ45 female console adapter for TCP/IP network interface with the doual-way conversion, with the serial port network function, support serial data and network data bi-directional transparent transmission.

Compatibility : Compatible with Standard 9 Pin D-sub RS-232 Devices, such as computer, laptop, printer, modem, router, PDA, POS device, digital CNC machine tool, Barcode scanner, etc.

65.6FT : Connect the equipment serial port to the RJ45 console port on routers, support maximum distance 65.6FT.