StarTech.com USB to RS232/RS485/RS422 Industrial 4 Port Serial Hub Adapter - USB to Serial Converter - ICUSB234854I - USB Adapters - CDW.com
USB 4-Port Serial Adapter / USB 2.0 Quad Port Serial DB-9 RS-232
4-Port USB to RS232 Adapter FTDI Cable - Coolgear
Moxa UPort 2410, USB to 4-port RS232 Converter
StarTech 4-Port USB to Serial Adapter Hub with COM ICUSB2324X
USB-COM232-PLUS4 - Ftdi - Adapter Board, FTDI Chip, USB to RS232
4-port USB to Serial RS232 Converter
Amazon.com: TECHTOO 4 Port Professional FTDI CHIP USB to Serial RS232 DB9 Adapter Converter Serial Cable 9-Pin Male to Male with Thumbscrews (W/Thumbscrews, 4 RS232 Port) : Electronics
4-Port USB DB-9 Serial Adapter Solution for Windows Operating Systems
StarTech.com 3ft USB to Serial Cable USB to Serial Port Adapter RS232 DB9 Male to USB Prolific IC - 1P3FPC-USB-SERIAL - USB Adapters - CDW.com
USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi : ID 954 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
FTDI Serial USB RS232 Adapter 4 port Din Rail Industrial - Shentek
USB 2 to Industrial 4-Port RS232-422-485 Serial TB Adapter - Coolgear
Ftdi Chip 4 Port Usb To Serial Rs232 Db9 Adapter Cable - Pc Hardware Cables & Adapters - AliExpress
4-port Usb 2.0 To 4x Rs232 Serial Cable Splitter Converter Ze552a(ftdi Chipset+win 10 Supported) - Pc Hardware Cables & Adapters - AliExpress
UC2324 - 4-Port USB-to -Serial RS-232 Hub
4-Port Industrial USB to RS-232 Serial Adapter Cable
USB 4-Port Serial Adapter - USB 2.0 to DB-9 Port RS232 with FTDI CHIP - Coolgear
4-Port USB to RS-232 Hub - UC2324, ATEN Converters | ATEN Corporate Headquarters
4-Port USB to RS-232 Serial Adapter Hub
4 Port Serial RS-232 Hub w/ FTDI Chipset & RX/TX LED Indicators
4-Port RS-422 / 485 USB to Serial Adapter - Coolgear
4-Port USB to RS232 Converter DB9 | Black Box
4 Port Professional RS-232 USB 2.0 to Serial Adapter
Amazon.com: StarTech.com 4 Port USB to Serial RS232 Adapter - Wall Mount - Din Rail - COM Port Retention - FTDI USB to DB9 RS232 Hub (ICUSB2324I) : Electronics
3ft USB to Serial Cable/RS232 Adapter - Serial Cards & Adapters | StarTech.com
![CTF4XRS232USB (Automotive/Industry 4-port RS232 USB adapter, FT4232HL, 9-48VDC) [ USB-Hub ]](https://www.cartft.com/image_db/CTF4XRS232USB.jpg "CTF4XRS232USB (Automotive/Industry 4-port RS232 USB adapter, FT4232HL, 9-48VDC) [ USB-Hub ]")