[USB-COMi-M]USB to 1-PORT RS232/ RS422/ RS485 ADAPTER, METAL CASE, DIN RAIL OPTION
[USB-8COMi-RM]USB TO 8 PORT RS232 / RS422 / RS485 ADAPTER - RACK MOUNTABLE
[USB-16COMi-RM]USB to 16-PORT RS232 / RS422 / RS485 SERIAL ADAPTER METAL CASE WITH DIN-RAIL