Urs104A RS485 Hub, 1 Channel Input, 4 Channels Output. Half-Duplex, One Way Communication, Designed for The PTZ Control on CCTV System - China RS485 Hub and RS485 Splitter
3onedata SW4485I RS-485 HUB | Westward Sales
RS-485 / RS-422 HUB
Optical Isolated RS485 Hub Repeater Allocator
Renkforce RF-19"-USB2-RS422+485-8 8 + 2 ports Serial hub meets industrial requirements, Steel casing Black | Conrad.com
8 Port Serial Hub USB to RS232 Adapter - Serial Cards & Adapters | StarTech.com