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Amazon.com: Taidacent 4/8 Way RS485 Hub RS485 Splitter 4/8 Ports RS485 Data Isolator 1 in 4CH/ 8CH Out Modbus 485 Industrial Photoelectric Isolation Repeater (4 Ports) : Electronics
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Amazon.com: Industrial Isolated 8-CH RS485 Hub, Extends 8-ch RS485 Slave Ports via 1-ch RS485 Master Port, 300~460800bps Wide Baud Rate, with Network Relay, Extension, Isolation Function, Support Rail-Mount : Electronics
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Amazon.com: COMMFRONT Industrial RS485 Opto-Isolated Hub/Splitter/Repeater, 2500V Optical Isolation, Supports 4x128 RS-485 nodes (Expandable), DIN-Rail/Wall/Panel Mount : Electronics
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