The Moxa NPort 5250A is a 2-port serial device server that brings RS-232/422/485 devices onto an IP network for remote access and integration. With a 0 to 60°C operating temperature range, it’s a dependable choice for typical industrial cabinets and plant environments where you want multi-serial flexibility without jumping to a rackmount unit.

Why We Love This Product

• Two ports with RS-232/422/485 support—ideal for mixed serial device fleets
• 0 to 60°C operating range suits most OT panels and control cabinets
• Cleaner and more scalable than using USB adapters or one-off serial extenders
• Great “small site” pick when you need more than one port but not a rackmount chassis

How Our Customers Use It

• Putting serial instruments, meters, and controllers onto Ethernet for monitoring
• Connecting RS-485/RS-422 field devices to SCADA or central applications over IP
• Remote servicing workflows for legacy serial devices without replacing them
• Small-scale modernisation projects where a compact, industrial device server is preferred

Choosing Tips

• Choose NPort 5250A when you need two ports and want RS-232/422/485 flexibility
• If you only need RS-232, the NPort 5210A is a simpler, more focused fit
• If you only need one serial device on Ethernet, the NPort 5150A/5110A single-port options reduce cost and complexity