Nport-5400 - 4-port RS-232/422/485 serial device servers.
Moxa
4-port RS-232/422/485 serial device servers.
Moxa is a Taiwanese manufacturer of network products. They offer ethernet switches and converters, routers, protocol gateways, serial servers, industrial computers, displays and much more.
The company is a supplier to a variety of different markets such as to oil and gas, railway, powerstations, industrial manufacturing, marine, building automation and other markets.