Amazon.com: MOXA MiiNePort E2-H-T Embedded Ethernet Serial Device Server, for TTL Devices, Drop-in Module, up to 921.6Kbps, Without RJ45, -40 to 85C : Electronics
Amazon.com: MOXA NPort IA-5250-2 Ports RS-232/422/485 Serial IA Device Server, 10/100 Ethernet (RJ45) : Electronics
Amazon.com: MOXA MGate MB3170i Advanced Serial-to-Ethernet Modbus Gateway, 1 Port RS-232/422/485 Modbus TCP to Modbus Serial ASCII/RTU, Class 1 Div 2, DIN Rail, 15KV Surge, 2KV Isolation : Electronics