I needed to add an ethernet connection to a remote network device in my electrical panel, but didn't want to add a separate circuit and 120v outlet to power a to supply standard circuit breakers. I have this and it was powered by my Juniper EX3300-48P switch from a nearby ethernet pass with no problems. Seems a bit pricey for what it is, but overall it was cheaper and faster than the other options for my scenario.
Zyxel 24 Gigabit Managed Rackmount GS1900 24E
8 Review
π MikroTik CRS312-4C+8XG-RM: High-Performance 12-Port 10G Switch with Dual Power Supply
8 Review
TP-Link TL-SF1016DS Fast Ethernet Switch - 16-Port 10/100Mbps, Plug & Play, Desktop/Rackmount, Sturdy Metal Housing with Shielded Ports, Fanless, Limited Lifetime Protection - Unmanaged
7 Review
π QNAP QSW-M2108-2C, 8-Port 2.5Gbps Management Switch with 2 Port 10Gbps SFP+ / NBASE-T Combo. Effortless web-based management.
9 Review
HB-UMLS Sabrent USB 2.0 Hub with 4 Ports and LED Power Switches for Each Port
12 Review
π StarTech.com NETRS232 Serial to IP Ethernet Device Server - DIN Rail Mountable - Serial Device Server - Serial Over IP Device Server (Black)
4 Review
π uni USB C Hub with Ethernet Adapter, 4K HDMI, Gigabit Ethernet, and 3 USB 3.0 Ports for MacBook Pro, iPad Pro, XPS
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π CERRXIAN RS232 to Ethernet Serial Device Server - TCP/IP Converter with 1Port DB9 RS232 Serial to Ethernet Connectivity
3 Review