RS485 TO WIFI/ETH Adapter (21968)

5 203₴

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Description

RS485 to WIFI/Ethernet - DIN Rail Industrial Serial Server

DIN Rail Serial Server Modbus Gateway MQTT Gateway

Device Overview

This module is an industrial RS485 data collector and IoT gateway, combining multiple functions in one device: serial server, Modbus gateway, MQTT gateway, RS485 to HTTPD Client, etc. With RS485, WIFI, and Ethernet ports, the module enables conversion between: serial port ↔ WIFI, serial port ↔ Ethernet, Ethernet ↔ WIFI.

Power is supplied via screw terminals and supports a wide voltage range of 5-36V. The flame-retardant PC+ABS V0 housing is DIN rail mountable — compact, robust, and easy to install. Suitable for data acquisition, IoT gateways, security systems, and smart device monitoring.

Technical Specifications

Enclosure and Connectivity
Communication Interface	RS485, screw terminals
Power Supply	5–36V DC, screw terminals
Housing	PC + ABS, V0 flame retardant grade
Dimensions (L × W × H)	109.66 × 28 × 64.71 mm
Network Interfaces
Ethernet	10/100 Mbps, auto-negotiation, RJ45 connector
WIFI	802.11b/g/n
Serial Port	RS485 (overvoltage, lightning, and overcurrent protection)
Wireless Characteristics
Frequency Range	2.412–2.484 GHz
Network Modes	Station / AP / AP+Station
Security	WPA-PSK / WPA2-PSK
Encryption	TKIP / AES
Transmit Power	802.11b: +19 dBm (max. @11 Mbps) 802.11g: +18 dBm (max. @54 Mbps) 802.11n: +17 dBm (max. @HT20, MCS7); +17 dBm (max. @HT40, MCS7)
Receive Sensitivity	802.11b: −89 dBm (@11 Mbps) 802.11g: −81 dBm (@54 Mbps) 802.11n: −73 dBm (@HT20, MCS7); −71 dBm (@HT40, MCS7)
Serial Port Characteristics
Baud Rate	300–460,800 bps
Parity Bit	none, odd, even, mark, space
Data Bits	5–9 bits
Flow Control	None
Software
Protocols	TCP / UDP / ARP / ICMP / DHCP / DNS / HTTP / MQTT
Configuration	Host, web browser, AT commands via serial port
Communication Method	Direct TCP/IP connection, VCOM
Operating Modes	Transparent transmission, serial commands, HTTPD Client, Modbus TCP ↔ Modbus RTU
Operating Conditions
Operating Temperature	−40°C … +85°C
Storage Temperature	−45°C … +125°C
Relative Humidity	5%–95%

Main Functions

Supports RS485 ↔ WIFI, RS485 ↔ Ethernet, Ethernet ↔ WIFI conversion, etc.

DIN Rail Mounting

Industrial DIN rail mountable enclosure — compact, cost-effective, easy to install.

Functional Block Diagram

Transparent Transmission Mode

Supports TCP Server / TCP Client / UDP Server / UDP Client.

Serial Command Mode

The user sends data to the server according to the protocol. Data can be sent to different servers without restarting the device.

HTTPD Client Mode

After configuring the HTTP header via AT commands or web page, the module can send data to or receive data from an HTTP server.

MQTT Support

The device can subscribe to messages from other MQTT clients and publish topics to the server. Supports subscribing to 6 messages and publishing 6 topics — a wider range of applications. Users can view device information via terminal devices or cloud platforms.

Modbus Gateway

Supports mutual conversion between Modbus TCP ↔ Modbus RTU.

AT Command Mode

The user can query the current status of the module or set parameters by sending AT commands via the serial port.

Key Features

Multiple Configuration Methods

Supports configuration via host application, web browser, and serial port (AT commands).

Socket Distribution Protocol

In transparent transmission mode, the serial device can send data to a specified Socket connection; network data from each Socket is transmitted to the serial device via the serial port.

Hardware Protection

ESD level 4 static protection, level 3 overvoltage protection, EFT level 3 electrical fast transient protection.

Configurable Registration and Heartbeat Packets

The registration packet is used to identify the device to the server, allowing the server to recognize connected devices.

Interface Description

Outline Dimensions

Resources and Support

Wiki: www.waveshare.com/wiki/RS485_TO_WIFI/ETH

Model Comparison Chart

Model	Network Port	Galvanic Isolation	Serial Port Type	Power Supply	Voltage	Dimensions (L×W×H)
RS485 TO ETH (B)	Normal	—	One Serial Port	Screw Terminals	DC 9–24V	87.0×36.0×59.0 mm
RS485 TO POE ETH (B)	PoE	Power + Signal	One Serial Port	Screw Terminals + PoE	DC 6–36V	87.0×36.0×59.0 mm
RS485 TO ETH (C)	Normal	Power + Signal	One Serial Port	Screw Terminals	DC 6–36V	87.0×36.0×59.0 mm
RS232 TO ETH (B)	Normal	Power + Signal	One Serial Port	Screw Terminals	DC 6–36V	87.0×36.0×59.0 mm
RS232 TO POE ETH (B)	PoE	Power + Signal	One Serial Port	Screw Terminals + PoE	DC 6–36V	87.0×36.0×59.0 mm
RS232/485/422 TO ETH (B)	Normal	Power + Signal	RS232/485/422 (one selectable)	Screw Terminals + DC 5.5mm	DC 6–36V	88.7×72.5×24.2 mm
RS232/485/422 TO POE ETH (B)	PoE	Power + Signal	RS232/485/422 (one selectable)	Screw Terminals + PoE + DC 5.5mm	DC 6–36V	88.7×72.5×24.2 mm
2-CH RS485 TO ETH (B)	Normal	Power + Signal	Two Serial Ports	Screw Terminals + DC 5.5mm	DC 6–40V	78.0×72.5×24.2 mm
2-CH RS485 TO POE ETH (B)	PoE	Power + Signal	Two Serial Ports	Screw Terminals + PoE + DC 5.5mm	DC 6–40V	78.0×72.5×24.2 mm
RS232 RS485 TO ETH (B)	Normal	Power + Signal	Two Serial Ports	Screw Terminals +

Part number: EV

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