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Small metal box with four DB9 ports and one RJ45

Vszerda

Vszerda USR-N540 4-port RS232/RS485/RS422 to Ethernet adapter

SKU CH-2EKZ-0BF80

A four-port serial device server that connects RS232, RS485 and RS422 equipment to an Ethernet network, with each port operating independently and virtual COM software included

  • Four serial ports operate simultaneously on one device
  • Each DB9 port configurable as RS232 RS485 or RS422
  • Virtual COM software maps ports to local applications
  • Port-number addressing identifies every connected serial device
  • Model USR-N540 converts legacy serial to Ethernet networks

Four-port serial-to-Ethernet converter

The Vszerda USR-N540 connects four serial devices to a local network through a single Ethernet link. Each DB9 female port operates independently as RS232, RS485 or RS422, so mixed equipment can share one converter. The unit includes an RS485/RS422 converter and supports virtual COM port software for Windows integration.

For multi-drop industrial networks

Engineers who need to bridge several legacy instruments to TCP/IP without adding multiple single-port gateways will find this device efficient. Installations requiring fibre uplinks, Power-over-Ethernet or wireless backhaul are not served by this wired RJ45-only model.

Four independent serial ports

The decisive specification is the count of four DB9 ports that each select RS232, RS485 or RS422 and operate simultaneously. If the project demands more than four serial channels or a different physical interface, another solution is required.

How it compares

Measured against everything we stock in Network Adapters & RJ45 Plugs, at today’s prices. Recalculated every night.

Price $76.99
Pricier than about 86% of the 1,221 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Does the USR-N540 ship with the RS485/RS422 converters or must they be purchased separately?

The USR-N540 includes the RS485/RS422 converter for each of the four DB9 female ports, so no separate converter purchase is required.

How do I decide which serial mode to configure on a USR-N540 port?

Each port on the USR-N540 can be set to RS232, RS485 or RS422 independently; choose the mode that matches the connected device's interface.

What does the four-port independent operation mean for my USR-N540 deployment?

All four serial ports on the USR-N540 can communicate simultaneously, each identified by its own port number for clear device mapping.

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