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"poe switch"

4-Ch RS485 to RJ45 Ethernet Serial Server with PoE Function, 4 Channels RS485 In
$177.87
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Dual Ethernet Base Board Compatible with Raspberry Pi Compute Module 5, Supports
$201.57
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Waveshare Serial Server RS232/485 to WiFi and Ethernet, Ethernet to WiFi Convert
$126.90
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