# Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial(with POE function)

**Type:** Product page · **SKU:** WS-23273 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/waveshare-industrial-serial-server-with-poe.html ([markdown](https://core-electronics.com.au/waveshare-industrial-serial-server-with-poe.html.md))

Industrial serial server, RS485 to RJ45 Ethernet, TCP/IP to serial, rail-mount support, with POE function(optional) | RS485 TO ETH (B)...

## Pricing

- **Price:** $38.50 (inc GST) — $35.00 AUD, exc GST
- **Quantity discounts:** 10+ $33.60 (exc GST) · 25+ $32.55 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 15 today, and up to 300 more in 12–19 days.

## Description

Connect RS485 devices directly to Ethernet networks with this compact industrial serial server that offers optional Power over Ethernet (PoE) support. Its DIN-rail mount design and transparent TCP/IP-to-serial operation make it ideal for remote monitoring and seamless integration of legacy equipment into modern IoT systems.

Whether you need a reliable Modbus gateway in a factory environment or a JSON-enabled IoT bridge for intelligent instrument monitoring, this module combines robust hardware isolation with flexible power options to simplify installation and ensure uninterrupted data flow.

### Technical Specifications

- **Serial interface:** 1 × isolated RS485 port
- **Ethernet:** 1 × PoE RJ45 port (IEEE 802.3af), 10/100 Mbps auto-negotiation, 2 kV surge protection
- **Protocols:** Bi-directional transparent serial data, Modbus TCP/RTU gateway, MQTT gateway, RS485-to-JSON conversion
- **Baud rate:** 300 – 115 200 bps
- **Data format:** 5 – 9 bits with none, odd, even, mark or space parity
- **Power supply:** 6 – 36 V DC via screw terminals or PoE
- **Isolation:** Power isolation and signal isolation for industrial safety
- **Mounting:** 35 mm DIN-rail case, compact footprint for tight control cabinets
 
### How to Use/Installation

1. Clip the unit onto a standard 35 mm DIN rail inside your control panel.
2. Connect a PoE-capable switch or injector to the RJ45 port, or wire 6 – 36 V DC to the screw-terminal power input.
3. Wire your RS485 A/B lines to the isolated terminal block, observing correct polarity.
4. Access the built-in web interface via its default IP address to configure TCP/IP settings and serial parameters.
5. Save your settings and test data flow between your Modbus master or MQTT broker and the RS485 device.
 
### Compatibility

- Modbus RTU/ASCII masters and slaves
- MQTT brokers such as Mosquitto or HiveMQ
- JSON parsers and HTTP clients
- IEEE 802.3af PoE switches and injectors
- Standard 35 mm DIN-rail mounting systems
 
### What’s Included

- RS485 to PoE Ethernet serial server module
- Removable screw-terminal blocks
- DIN-rail mounting clip
- Quick-start guide
 
### Resources

- [Waveshare Wiki - RS485 TO POE ETH (B)](https://www.waveshare.com/wiki/RS485_TO_POE_ETH_(B))

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/W/S/WS-23273-1.jpg)