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
Yn-5204 Isolated 4-port Rs485 Hub Repeater Instead Of Ut5204 Isolated Rs323/485 To 4-port Rs-485 Hub Yn5204 - Replacement Parts - AliExpress
I-7513 | ICP DAS USA Inc - Data Acquisition
RS485HUB : 4-Port RS485 Repeater / HUB with RS232 Port - R.E.Smith Serial Communications RS485 RS232 RS422
Industrial 2 Port Din Rail RS232 RS-485 to RS485 Hub Installation with Isolation | eBay