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Compact rail-mount serial server with RS485 and RJ45 ports, matte metal finish

WaveShare

WaveShare Industrial Serial Server RS485 RJ45 POE Rail-mount Modbus Gateway device server

SKU CH-56AX-Z3F77

An industrial serial server converts RS485 signals to Ethernet with PoE, Modbus gateway, MQTT gateway and RS485-to-JSON functions for sensor data collection

  • CPU TypeOther
  • Multi-protocol gateway simplifies integration by combining Modbus, MQTT and JSON conversion in one unit
  • Rail-mount design enables compact side-by-side installation for dense industrial deployments
  • POE power supply reduces cabling by delivering data and power over a single Ethernet link
  • Bi-directional transparent transmission links RS485 instruments to Ethernet networks without custom code
  • Multi-host roll-polling prevents crosstalk when several network masters query the same serial bus

Industrial serial server for RS485 networks

This WaveShare device server combines serial conversion, Modbus gateway, MQTT gateway and RS485-to-JSON functions in one unit. It provides bi-directional transparent data transmission between an RS485 interface and an Ethernet port. The compact rail-mount design suits industrial cabinets where multiple instruments and sensors need network connectivity.

Rail-mount integration and PoE power

The module mounts on standard DIN rails, allowing several servers to be installed side by side without extra brackets. Power over Ethernet supplies the unit through the RJ45 link, removing the need for a separate power cable. An RS485 field bus connects directly to the terminal block while the Ethernet port links to the local network or a cloud gateway.

Sustained multi-host polling and protocol conversion

Multi-host roll-polling identifies each network device and responds without crosstalk during continuous operation. TCP server, TCP client, UDP and UDP multicast modes maintain stable streams over long periods. NTP synchronisation provides accurate timestamps for logged data, while MQTT/JSON-to-Modbus translation keeps protocol conversion running reliably under constant load.

Highlights

  • Multi-protocol gateway simplifies integration by combining Modbus, MQTT and JSON conversion in one unit
  • Rail-mount design enables compact side-by-side installation for dense industrial deployments
  • POE power supply reduces cabling by delivering data and power over a single Ethernet link
  • Bi-directional transparent transmission links RS485 instruments to Ethernet networks without custom code
  • Multi-host roll-polling prevents crosstalk when several network masters query the same serial bus

Specifications

CPU TypeOther

Questions about this item

How many RS485 devices can share the single port before communication degrades?

The server has one RS485 interface; practical device count depends on each sensor's unit load and cable length, so plan the bus within standard RS485 limits.

Does the enclosure need active cooling when powered continuously via PoE?

No fan is fitted; the unit relies on passive dissipation and is designed for rail-mount cabinets with adequate airflow.

What network infrastructure must exist for the PoE-powered model to operate?

A PoE-capable switch or midspan injector delivering 45 W on the RJ45 port, plus a standard Ethernet cable.

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