MOXA Device server - NPort 5450I-T - 4-port, 10/100M ethernet, RS-232/422/485 DB9 male, w/ 2 kV isolation, 12~48 Vdc

Network Readiness for up to Four Serial Devices
NPort® 5450 device servers can conveniently and transparently connect up to four serial devices to an Ethernet, allowing you to network your existing serial devices with only basic configuration. Data transmission between the serial and Ethernet interfaces is bi-directional. By using NPort® device servers, you not only protect your current hardware investment, but also allow for future network expansion. You can both centralize the management of your serial devices, and distribute management hosts over the network.

Independent Operation Mode for each Serial Port
NPort® 5450 device servers can be used to connect different devices for remote data polling, event handling, or data multicasting over a TCP/IP network. Each serial port on the NPort® 5450 operates independently to provide maximum versatility. For example, port 1 can operate in Driver mode, port 2 in TCP Server mode, and ports 3 and 4 in TCP Client mode.