IMG-2400T Industrial 4-Port RS232/422/485 Modbus Gateway - Planet Technology USA
Amazon.com: Kowellshine UTEK UT-885 USB to RS-485/422 Interface Protocol Vonverter (1-Port USB to RS-422/485 Serial Converter with ESD Protection) : Electronics
Serial Interface Adapter 2402 to 4-Port RS-422/485 DB9
BB-422PP9TB-Serial Converter, RS-232 DB9 F to RS-422 TB, Port Powered
M.2-COM-4SM Family of Four and Two-Port Multi-Protocol RS-232/422/485 M.2 Cards - ACCES I/O Products
EKI-1528 - 8-port RS-232/422/485 Serial Device Server - AC Input, DB9, Rackmount - Advantech