Waveshare Dual Gigabit Ethernet Mini-computer Based On Raspberry Pi Compute Module 4 (not Included), Metal Case,with Cooling Fan - Demo Board - AliExpress
Wired Communication Modules, Interface Converter
5.5inch 1440x2560 LCD - Waveshare Wiki
Rail-Mount Serial Server, RS232/485/422 to RJ45 Ethernet Module, TCP/IP to serial, With POE Function - AliExpress
Waveshare Industrial Grade 5P Gigabit Ethernet Switch IEEE 802.3X-Compliant Full-Duplex 10/100/1000M Connection DIN Rail Mount
Waveshare Dual Gigabit Ethernet Mini-computer Based On Raspberry Pi Compute Module 4 (not Included), Metal Case,with Cooling Fan - Demo Board - AliExpress
Buy Waveshare Industrial 5P Gigabit Ethernet Switch
Waveshare Industrial Grade 5P Gigabit Ethernet Switch IEEE 802.3X-Compliant Full-Duplex 10/100/1000M Connection DIN Rail Mount
Industrial Modbus RTU 8-ch Relay Module, RS485 Bus, Multi Protection (WS-17658)
Waveshare Industrial 5P Gigabit Ethernet Switch Full-Duplex 10/100/1000M DIN Rail Mount : : Computers & Accessories
Waveshare Industrial Grade Multi USB HUB w/ 100M Ethernet Port (w/o Power Plug) - RobotShop
File:Netgear Gigabit Switch 5-port.jpg - Wikimedia Commons