Best Power Supply Serial Adapters in 2026

Add an RS232 serial port with circuit isolation to your laptop or desktop computer through USB

1 Port FTDI USB to Serial RS232 Adapter Cable with Isolation

USB to RS232 Serial Adapter Cable

Wide range of applications: USB to RS232 DB9 male serial adapter can work with your Windows (10 / 8.1 / 8 / 7 / Vista / XP), MAC or Linux system and other platforms. USB adapter is designed to connect to serial devices, such as serial modem with DB9, ISDN terminal adapter, digital camera, label writer, palm computer, barcode scanner, PDA, cash register, CNC, PLC controller, tax printer, POS, bar code scanner, label printer, etc

High quality: ftdi usb serial,the latest ftdi chip set ensures more reliable and faster operation. USB 2.0 to RS232 male DB9 console cable will support 1Mbps date transfer rate

Most convenient: rs232 to usb simple installation, plug and play, COM port creation, baud rate can be changed to the required settings. USB power supply - no external power supply required.

1 USB port to Dual RS-232 Serial Ports

Supports full RS232 Handshaking

Baud rates up to 921,600bps

MULTI-USE FUNCTIONALITY - Quad Port Serial Adapter with FT4232 FTDI Chipset, that supports an automatic handshake allows for digital signage to connecting point of sales systems and barcode scanners.

EASY INSTALLATION - This serial adapter lets you enjoy simple installation and operation with COM port retention that provides robust serial connectivity for legacy devices. With no power supply needed, easy plug and play USB interface options.

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

USB to RS485/RS422 converter It easily lets you connect RS485 or RS422 device directly to your Laptop PC computer USB port

RS485 Serial to USB adapter is ideal for industrial environment -provides 600w surge protection and 15KV ESD isolated protection on signal pins to protect costly and often sensitive control equipment against electrical damage

USB to RS485 cable adapter is with high performance quality processor chip (FTDI-chipset FT232) and I/O auto conversion circuitry which makes RS 485 to USB convertor one of the most reliable dongle on the market

Output:DC 19.5V 4.7A 92W; Input:AC 100-240V 50-60Hz; Connector Size:6.5*4.4mm; Prongs:2-Prong; Package:1x Ac adapter and 1x power cord; LNOCCIY has registered a U.S. Trademark and the serial number is 87765902

This Adapter works for SONY VAIO PCGA-AC19V10 PCGA-AC19V11 VGP-AC19V10 VGP-AC19V12 VGN-A6 VGP-AC19V13 VGN-A6 PCGA-AC19V14 VGP-AC19V19 VGP-AC19V20 VGP-AC19V21 VGP-AC19V23 VGP-AC19V26 VGP-AC19V37 VGP-AC19V33 VGN-A115B VGN-A115M VGN-A115S VGN-A115Z VGN-A317 VGN-A317M VGN-AX570 VGN-AX570G VGN-AX580 VGN-AX580G VGN-BX194VP VGN-BX195EP

Compatible for SONY PCG-3J1L PCG-5K2L PCG-6G3L PCG-6G4L PCG-7161L PCG-7172L PCG-7Y2L PCG-4121Gl PCG-61A14L PCG-GRX VGN-AR VGN-CR309E/R VGN-FS620/W VGN-N250E/W VGN-NR180E VGN-NW240F/S VGN-NW310F VGN-CR240E VPCEE25FX VPCCW21FX VGP-AC19V11 VGP-AC19V2

Designed to be used for USB to TTL electronic projects, easy to connect to your MCU or Raspberry Pi. Status LED for TX,RX,USB

Built-in Silicon Labs CP2102 USB to TTL Serial Transfer Chip ,Industrial chip, high quality, super stable.

Standard USB power supply, the lead pin includes: 3.3V, GND, TXD, RXD, 5V, GND. With this adapter, you can power 3.3V and 5V microcontrollers. Very flexible.

Gomarty:100% NEW AC Power Adapter,Input:100-240V-1.2A 50/60Hz Output:19V 3.42A Outlet: 3-prong Connector Size:5.5*1.7mm(Refer to the picture!Please check it!!!)Package:1x Ac adapter and 1x 48 inch Ac power Cord;Gomarty has registered a U.S. Trademark and the serial number is 87155272

Compatible Models:PA-1500-02 PA-1600-02 PA-1650-01 PA-1650-02 PA-1650-22 PA-1650-69 PA-1650-86 PA-1700-02 ADP65DB ADP-65DB ADT-W61 SADP-65KB 103310,Gateway MD7818U MD7820U NE56 NE56R10U NE56R11U NE56R12U NE56R13U NE56R15U NE56R27U NE56R31U NE56R34U NE56R37U NE56R41U NE56R42U NE71B06U NV55C NV57H NV59 NV59C NV73 NV79 Q5WTC

Part Numbers:Acer Aspire 1410 1640 1640Z 1650 1650Z 1680 2000 3000 3100 3610 3690 5030 7100 9400,TravelMate 230 280 290 2300 2430 3000 3210 4000 C210, ChromeBook AC700-1099 AC700-1529 AC710 C7 C700 C710 C710-2055 C710-2411 C710-2457 C710-2815 C710-2826 C710-2833 C710-2834 C710-2847 C710-2856,Emachines D727 E440 E442 E520 E525 E527 E528 E620 E625 E627

Industrial-grade :The built-in isolated power supply and ADI signal isolation chip can effectively protect computer damage caused by accidental short circuit, electric shock and other damage.

USB to RS485/RS422:Support RS-422 (RxD+, RxD-, TxD+, TxD-, GND) and RS-485(A+, B-, GND) Interface.

High stability: Built-in original FTDI FT232RL chip,Maximum speed up to 3Mbps

Gomarty:100% NEW AC Power Adapter,Input:100-240V-1.8A 50/60Hz Output:19V 3.42A Outlet: 3-prong Connector Size:3.0*1.1mm(Refer to the picture!Please check it!!!)Package:1x Ac adapter and 1x 48 inch Ac power Cord;Gomarty has registered a U.S. Trademark and the serial number is 87155272

Compatible Models:PA-1650-80 NP.ADT11.00F, A13-045N2A, AK.045AP.060, KP.06503.007, NP.ADT11.008, KP.06503.005, NP.ADT11.00C,Acer Chromebook 13 14 15 C810 CB5 CB3-431 C910 CB3 CB5 CB5-571 C720 C720p C740,Aspire P3 P3-131 R14 R5-471T S7 S7-191 S7-391 S7-392 Iconia W700 Tablet AO1-131 AO1-431

Part Numbers:Acer Chromebook C720 C720P C720-2103 C720-2420 C720-2800 C720-2802 C720-2827 C720-2844 C720-2848 C720P C720P-2457 C720P-2600 C720P-2625 C720P-2661 C720P-2666 C720P-2834,Aspire S5 S7 S5-371 S5-391 S7-191 S7-391 S7-392 S7-393 S5-371-52JR S5-391-6836 S5-391-9860 S5-391-9880 S7-191-6400 S7-191-6447 S7-191-6640 S7-191-6859 S7-391-6413 S7-391-6468 S7-391-6478 S7-391-6810 S7-391-6812 S7-391-6818 S7-392-6425 S7-392-6484 S7-392-6807 S7-392-6832 S7-392-7863 S7-392-9404 S7-392-9439 S7-392-9460

(NOT USB-to-VGA monitor cable) RS232C USB to serial FEMALE cable to connects a PC laptop or desktop without DB9 port to a RS232 serial device for data communication via COM port

10ft long female serial to USB adapter is with USB-Powered design requires no bulky power supply with superior performance, offering an easy connectivity for serial plug devices

Prolific USB to RS232 adapter is with PL-2303 Chipset for widest possible compatibility with Windows 11, 10, 8, 7, XP, Vista, 2000, 98, MacOS8 or higher, Linux 2.4.0 and later, and other platforms

Ultra compact board size:15 x 14 mm, FCC Certified

Male DB9 Connector (RS232)

Supports 3V to 5.5V power supply (***The Rx/Tx logic level is equal to the Vcc-supply.*** Vcc: 3.3V -> Rx/Tx High Logic Level: 3.3V. Vcc: 5V -> Rx/Tx: 5V )

Output:DC 14V 3A 42W; Input:AC 100-240V 50-60Hz; Prongs:2-Prong; Connector Size:6.5*4.4mm; Package:1x Ac adapter and 1x Ac power cable; LNOCCIY has registered a U.S. Trademark and the serial number is 87765902

This Adapter works for Dell 1500FP 1700FP 1701FP 1702FP 1900FP LCD TV Monitor GH17P SCV420108;Samsung A3514 DHS A3514 DPN ad-3014 ad-3014n ad-3014stn ad-4214l ad-4214n ap04214-uv ap06314-uv bn44-00080a bn44-00394a pa30n pn3014 pscv360104a

Compatible for Samsung S27a350h S20D340H S20D340HY S22D300BY S22D300HY S22D300NY S22D340HY S24D300HL S24D340H S24D340HL TFT LCD Monitor Power Supply Cord Adaptor; Samsung S24A450B S24A450BW 24" LED Monitor, Samsung S24A850DW 24" 850 Series LED Monitor, Samsung S27A850D 27" 850 Series Business LED Monitor,23" Samsung Syncmaster Model BX2331 AD-3014 S22B150 172 LS24A450 LS24A450BWT/EN Monitor

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.

Ultra compact board size:15 x 14 mm, FCC Certified

Female DB9 Connector (RS232)

Supports 3V to 5.5V power supply (***The Rx/Tx logic level is equal to the Vcc-supply.*** Vcc: 3.3V -> Rx/Tx High Logic Level: 3.3V. Vcc: 5V -> Rx/Tx: 5V )

433Mhz SI4438 1000M HC-12 Replace Bluetooth Antenna

Power supply voltage : 3.3V

Default communication distance: about 1000 meters

Hi-Speed USB Serial Adapter, PC, MAC, supports Cisco Break Sequence

No power supply needed, plug and play

RS232 output power: -5.7 to +5.7VDC

USB 3.0 with two external standard Type-A ports and one dual port internal connector

PCI Express 2.0 with single lane (x1) throughput 5Gbit/s

Supports simultaneous operation of multiple USB 3.0/2.0/1.1 devices

Superior Build Quality: Housed in a rugged steel chassis with built in mountable flanges, the serial adapter hub is perfect for installations in labs, warehouses, or heavy machinery.

Safe Industrial Connections: Designed for use with Bar Code Scanners, Time Clocks, Label Printers, Point of Sale Terminals, Receipt Printers, and more the USB to Serial Adapter offers 15kV surge protection for connected devices.

Effortless Port Configuration: The adapter is designed with external dip switches to set RS-232, RS-422 or RS-485 ports and different operation modes conveniently.

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

4-Port USB to Serial converter: this USB to Serial converter turns your computer's USB port into four DB9 ports capable of connecting RS-422 and RS-485 Serial devices, such as modems, handheld scanners and GPS systems. No external power source is needed.

Independent dip switches: the u208-004-ind’s Serial ports can be set to automatically detect an RS-422 or rs-485 device by adjusting their dip switch settings.

Compatibility: the wall-mountable USB to Serial converter USB-powered, so no bulky or obtrusive external power supply is required. System requirements include Windows XP or later, Mac OS X 10.4 or later, Linux 2.6.31 or later or a computer with an available USB port. Perfect for activating surveillance cameras, access panels and other security equipment.

【4 channel】 This is 4 channel relay module, 1 channel / 2 channel / 3 channel / 4 channel condition available.

【DC 12V+DB9 】 This relay adopted DC 12V power supply (voltage range 9-13v). RS232 DB9 female interface.

【fully function】 "Read", "open", "close", "Self-locking" , click, interlock 6 commands, meet your different operation purpose.

3.3V with 5.0V power supply perfectly compatible.

3.3V with 5.0V signal perfectly compatible.

Operating temperature : -40 ℃ ~ + 85 ℃.

【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.

MEIRIYFA DB9 Gender Changer Converter works with any serial device and can be used with PCs, modems, printers, scanners, cash registers, POS machines and many more DB9 serial communication devices.

DB 9 Male/Female to Male/Female Adapter, a quick and economical way to change the gender of a "D" port. Connect two female serial cables together, or convert a 9-pin female/male connection to a 9-pin male/female connection.

The DB9 gender changer is plug and play, no power supply required. Tight and stable structure, low resistance transmission Stable low profile Space saving, change gender quickly, or connect two cables together!

<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

[Upgraded Scheme] This 4 ports networking serial device server is 2-port RS232 and 2-port RS485 serial to Ethernet converter. It adopts Cortex-M7 solution,which has a main frequency up to 400MHz, powerful performance, fast transmission speed, and high reliability. 5-36V wide voltage input, with reverse polarity protection and ESD electrostatic protection.all serial adapters passed electrical fast transient test and lightning surge immunity test.

[Basic Function] RS232 RS485 serial adapter equipped with a deeply optimized TCP/IP stack, built in hardware watchdog and a variety of keepalive mechanisms,so that it keeps online all the time,automatically restarts when the device goes down.4 ports IOT server supports TCP Client, TCP Server, UDP Client, UDP Server and HTTPD Client working modes, achieves data transparent transmission via simple configuration.Supports configuring parameters via built-in webpage,serial and network AT commands.

[Data encrypted transmission & Cloud management] Adopt two-way certificate verification + SSL transmission encryption mechanism to ensure data security. Transmission protocols such as TCP, HTTP, and MQTT can achieve eavesdropping, anti-tampering, and anti-counterfeiting.RS232 RS485 ethernet converter can fully access the cloud platform for device and data management, and easily realize applications such as edge computing, data forwarding, and remote operation and maintenance.

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)

√USB to 9-pin serial cable Product features: easy installation, no external power supply, and physical drive required

√Applicable scope: This product can easily realize the conversion between the USB interface of the computer and the universal serial port, providing a fast channel for the computer without a serial port, and using this product is equivalent to turning the traditional serial port device into a plug-and-play USB device.

√ Supports various models of MCU, MCU STC download, LED screen control card, MODEM, and ISDN terminal adapter communication is suitable for computers or notebooks with USB ports.

USB to RS485 Serial Converter adopts CH340T new chip, supporting WindowsXP, Vista, 32-bit / 64-bit Windows 7 etc. operating system

With TVS surge protection and USB self recovery protection, anti-interference, stable performance.

Support USB 2.0 interface, backward compatible with USB 1.1, accord with RS485 standard.