RS232 TO POE ETH (B) Adapter (23951)
RS232 TO POE ETH (B) Adapter (23951)
SKU: 1111
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Description
Industrial RS232 to Ethernet (RJ45) Serial Server
Industrial serial server for bi-directional transparent data conversion between RS232 and Ethernet. Supports serial server, Modbus gateway, MQTT gateway, RS232 to JSON conversion functions. DIN rail-mount case, compact size, screw terminal power supply.
Variants
RS232 TO ETH (B)
Standard Ethernet port
RS232 TO POE ETH (B)
Ethernet port with PoE support
Both variants are identical in software functions. RS232 TO POE ETH (B) is a hardware-enhanced version with support for Power over Ethernet (IEEE 802.3af).
Device Overview
This module is an RS232 data collector / IoT gateway for industrial environments. It combines several functions in one enclosure: serial server, Modbus gateway, MQTT gateway, RS232 to JSON conversion, etc. The device is equipped with RS232 and Ethernet ports (PoE option), and screw terminals for power connection. The compact DIN rail-mount enclosure ensures easy installation. Suitable for data acquisition, IoT gateways, security systems, and intelligent instrument monitoring.
Technical Specifications
| Parameter | RS232 TO ETH (B) | RS232 TO POE ETH (B) |
|---|---|---|
| Device Type | Serial server, Modbus gateway, MQTT gateway | |
| Main Function | Bi-directional transparent data transmission between RS232 and Ethernet | |
| Communication Interfaces | RS232 × 1, Ethernet × 1 | |
| Power Supply | Screw terminals 6–36 V DC | Screw terminals 6–36 V DC or PoE port |
| Galvanic Isolation | Power isolation, signal isolation | |
| Communication | ||
| Ethernet | Standard network port | PoE port, IEEE 802.3af standard |
| RJ45 connector with 10/100 Mbps auto-negotiation, 2 kV surge protection | ||
| Serial Port | Isolated RS232 | |
| Serial Port Parameters | ||
| Baud Rate | 300 – 115,200 bps | |
| Parity Bit | None, odd, even, mark, space | |
| Data Bits | 5 – 9 bits | |
| Flow Control | None | |
| Software | ||
| Protocols | ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS | |
| Configuration | Host, web browser, device management function library | |
| Communication Method | Direct TCP/IP connection, VCOM | |
| Operating Modes | TCP server, TCP client (simultaneous with TCP server), UDP, UDP multicast | |
| Other | ||
| Operating Temperature | -40 °C … +85 °C | |
| Relative Humidity | 5 % – 95 % | |
| Dimensions (L × W × H) | 87 × 36 × 59 mm | |
Primary Function
Bi-directional transparent data transmission between RS232 and Ethernet
DIN Rail Mount
Convenient integration of multiple serial servers on a single rail — flexible and compact installation.
Modbus Gateway Support
Suitable for Modbus network modernization. Used with specialized configuration software.
Multiple Communication Modes
Supports: TCP server / TCP client / UDP / UDP multicast
MQTT / JSON ↔ Modbus
Flexible conversion between various protocols.
When used as an MQTT gateway, the device transmits serial data to an MQTT server via transparent transmission. Supported servers include: Baidu Cloud MQTT, Alibaba Cloud MQTT, China Mobile OneNet, etc. Modbus RTU data or non-standard serial data can be parsed into JSON format and encapsulated into an MQTT packet for upload.
When used as a JSON data acquisition gateway, the device connects to measuring instruments via RS232, automatically collects data, converts it to JSON format, and sends it to the server. Supported protocols include: Modbus RTU, 645 instruments (versions 97 and 07), and various non-standard RS232 protocols. The upload format is configurable via the host; MQTT, HTTP POST, and HTTP GET protocols are supported.
Multi-Host Polling Support
Different network devices are identified and receive responses separately — without cross-interference when working with multiple network devices simultaneously.
Configurable Heartbeat Packet / Registration Packet
Simplifies cloud communication and device identification.
NTP Protocol Support
Obtain network time for serial port output or data upload.
Multiple Configuration Methods
Supports configuration via web browser, dynamic IP address acquisition via DHCP, connection to domain server via DNS protocol.
Interface Description
Product Photos
Dimensions
Resources & Support
- Wiki (RS232 TO ETH B): www.waveshare.com/wiki/RS232_TO_ETH_(B)
- Wiki (RS232 TO POE ETH B): www.waveshare.com/wiki/RS232_TO_POE_ETH_(B)
Model Selection Guide
| Model | Network Port | Galvanic Isolation | Serial Port Type | Power Supply | Voltage | Dimensions (L×W×H) |
|---|---|---|---|---|---|---|
 RS485 TO ETH (B) |
Standard | — | 1 serial port | Screw terminals | DC 9–24 V | 87×36×59 mm |
 RS485 TO POE ETH (B) |
PoE | Power + signal | 1 serial port | Terminals + PoE | DC 6–36 V | 87×36×59 mm |
 RS485 TO ETH (C) |
Standard | Power + signal | 1 serial port | Screw terminals | DC 6–36 V | 87×36×59 mm |
 RS232 TO ETH (B) |
Standard | Power + signal | 1 serial port | Screw terminals | DC 6–36 V | 87×36×59 mm |
 RS232 TO POE ETH (B) |
PoE | Power + signal | 1 serial port | Terminals + PoE | DC 6–36 V | 87×36×59 mm |
 RS232/485/422 TO ETH (B) |
Standard | Power + signal | RS232/485/422 (one to |
Description
Industrial RS232 to Ethernet (RJ45) Serial Server
Industrial serial server for bi-directional transparent data conversion between RS232 and Ethernet. Supports serial server, Modbus gateway, MQTT gateway, RS232 to JSON conversion functions. DIN rail-mount case, compact size, screw terminal power supply.
Variants
RS232 TO ETH (B)
Standard Ethernet port
RS232 TO POE ETH (B)
Ethernet port with PoE support
Both variants are identical in software functions. RS232 TO POE ETH (B) is a hardware-enhanced version with support for Power over Ethernet (IEEE 802.3af).
Device Overview
This module is an RS232 data collector / IoT gateway for industrial environments. It combines several functions in one enclosure: serial server, Modbus gateway, MQTT gateway, RS232 to JSON conversion, etc. The device is equipped with RS232 and Ethernet ports (PoE option), and screw terminals for power connection. The compact DIN rail-mount enclosure ensures easy installation. Suitable for data acquisition, IoT gateways, security systems, and intelligent instrument monitoring.
Technical Specifications
| Parameter | RS232 TO ETH (B) | RS232 TO POE ETH (B) |
|---|---|---|
| Device Type | Serial server, Modbus gateway, MQTT gateway | |
| Main Function | Bi-directional transparent data transmission between RS232 and Ethernet | |
| Communication Interfaces | RS232 × 1, Ethernet × 1 | |
| Power Supply | Screw terminals 6–36 V DC | Screw terminals 6–36 V DC or PoE port |
| Galvanic Isolation | Power isolation, signal isolation | |
| Communication | ||
| Ethernet | Standard network port | PoE port, IEEE 802.3af standard |
| RJ45 connector with 10/100 Mbps auto-negotiation, 2 kV surge protection | ||
| Serial Port | Isolated RS232 | |
| Serial Port Parameters | ||
| Baud Rate | 300 – 115,200 bps | |
| Parity Bit | None, odd, even, mark, space | |
| Data Bits | 5 – 9 bits | |
| Flow Control | None | |
| Software | ||
| Protocols | ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS | |
| Configuration | Host, web browser, device management function library | |
| Communication Method | Direct TCP/IP connection, VCOM | |
| Operating Modes | TCP server, TCP client (simultaneous with TCP server), UDP, UDP multicast | |
| Other | ||
| Operating Temperature | -40 °C … +85 °C | |
| Relative Humidity | 5 % – 95 % | |
| Dimensions (L × W × H) | 87 × 36 × 59 mm | |
Primary Function
Bi-directional transparent data transmission between RS232 and Ethernet
DIN Rail Mount
Convenient integration of multiple serial servers on a single rail — flexible and compact installation.
Modbus Gateway Support
Suitable for Modbus network modernization. Used with specialized configuration software.
Multiple Communication Modes
Supports: TCP server / TCP client / UDP / UDP multicast
MQTT / JSON ↔ Modbus
Flexible conversion between various protocols.
When used as an MQTT gateway, the device transmits serial data to an MQTT server via transparent transmission. Supported servers include: Baidu Cloud MQTT, Alibaba Cloud MQTT, China Mobile OneNet, etc. Modbus RTU data or non-standard serial data can be parsed into JSON format and encapsulated into an MQTT packet for upload.
When used as a JSON data acquisition gateway, the device connects to measuring instruments via RS232, automatically collects data, converts it to JSON format, and sends it to the server. Supported protocols include: Modbus RTU, 645 instruments (versions 97 and 07), and various non-standard RS232 protocols. The upload format is configurable via the host; MQTT, HTTP POST, and HTTP GET protocols are supported.
Multi-Host Polling Support
Different network devices are identified and receive responses separately — without cross-interference when working with multiple network devices simultaneously.
Configurable Heartbeat Packet / Registration Packet
Simplifies cloud communication and device identification.
NTP Protocol Support
Obtain network time for serial port output or data upload.
Multiple Configuration Methods
Supports configuration via web browser, dynamic IP address acquisition via DHCP, connection to domain server via DNS protocol.
Interface Description
Product Photos
Dimensions
Resources & Support
- Wiki (RS232 TO ETH B): www.waveshare.com/wiki/RS232_TO_ETH_(B)
- Wiki (RS232 TO POE ETH B): www.waveshare.com/wiki/RS232_TO_POE_ETH_(B)
Model Selection Guide
| Model | Network Port | Galvanic Isolation | Serial Port Type | Power Supply | Voltage | Dimensions (L×W×H) |
|---|---|---|---|---|---|---|
RS485 TO ETH (B) |
Standard | — | 1 serial port | Screw terminals | DC 9–24 V | 87×36×59 mm |
RS485 TO POE ETH (B) |
PoE | Power + signal | 1 serial port | Terminals + PoE | DC 6–36 V | 87×36×59 mm |
RS485 TO ETH (C) |
Standard | Power + signal | 1 serial port | Screw terminals | DC 6–36 V | 87×36×59 mm |
RS232 TO ETH (B) |
Standard | Power + signal | 1 serial port | Screw terminals | DC 6–36 V | 87×36×59 mm |
RS232 TO POE ETH (B) |
PoE | Power + signal | 1 serial port | Terminals + PoE | DC 6–36 V | 87×36×59 mm |
RS232/485/422 TO ETH (B) |
Standard | Power + signal | RS232/485/422 (one to |
