RS232 RS485 to Ethernet Converter | Dual Serial Device Server with Modbus TCP RTU Support | Simultaneous RS-232 & RS-485 | Industrial DIN Rail | DC 6–70V | DHCP & Static IP | Web UI Config
Industrial RS232 + RS485 to Ethernet Serial Device Server with Modbus Gateway
The AN-IP-2-RS232-485-M is a dual-port industrial serial-to-Ethernet converter designed to integrate legacy RS-232 and RS-485 devices into modern TCP/IP networks. Supporting Modbus RTU to Modbus TCP conversion, multiple communication modes, and wide 6–70V DC input, it is ideal for PLCs, SCADA systems, sensors, and industrial automation environments.
Built with industrial-grade protection and DIN rail mounting for control cabinet deployment.
Modbus RTU to Modbus TCP Test – Temperature Sensor Demonstration
This demonstration shows the AN-IP-2-RS232-485-M operating as a Modbus RTU to Modbus TCP gateway.
An RS-485 Modbus temperature sensor is connected to the serial port, and real-time data is accessed over Ethernet via Modbus TCP.
The test verifies:
- Stable RS-485 communication
- Modbus RTU polling
- RTU-to-TCP protocol conversion
- Remote Ethernet access to serial device
The device is configured via Web UI and demonstrates reliable data transmission in an industrial environment scenario.
Application: RS-232 & RS-485 Devices Integrated into Ethernet Network
The AN-IP-2-RS232-485-M enables simultaneous integration of RS-232 and RS-485 serial devices into a standard Ethernet TCP/IP network.
Both serial interfaces can operate at the same time, allowing mixed-device environments to be connected through a single industrial gateway.
In the example above:
- Multiple RS-485 Modbus slave devices are connected via the RS-485 bus
- An RS-232 device operates independently on the RS-232 port
- The serial server performs Modbus RTU to Modbus TCP conversion
- Data is transmitted over Ethernet through a switch to a PC or SCADA system
- Wide 6–70V DC input allows installation in control cabinets or industrial power systems
This architecture is commonly used in:
- Industrial automation and PLC systems
- SCADA monitoring environments
- Energy management and smart metering
- Building automation systems
- Remote monitoring of legacy serial equipment
By converting Modbus RTU to Modbus TCP, the device allows legacy serial field devices to be integrated into modern Ethernet-based control networks without replacing existing infrastructure.
| RS-485 Standard | EIA/TIA-485 RS-485 (ISO/IEC8284 |
| RS-232 Standard | EIA/TIA-232 RS-232 (ITU-T V.28) |
| Screw Terminal Type | 5.08mm pitch screw terminal |
| Ethernet | Interface: RJ45 with Auto-MDIX |
| Ethernet Speed | 10/100 Mbit/s |
| Ethernet Connector | RJ-45 |
| Power Input | DC 9–70V (AC/DC power adapter comes in set) |
| Power Consumption | Consumption: <3W |
| Power Input Protection | Overload and reverse connection |
| Management & Configuration | Web Manager (via IP) |
| Dimensions | 97 mm (3.82″) L × 54 mm (2.13″) W × 32 mm (1.26″) H |
| Unit Weight | 0.072 kg (0.16 lb) |
| Max Baud Rates: | 1 RS232 + 1 RS485 serial port, 300bps–921600bps (RS232 max: 256Kbps), non-blocking, custom baud rate support |
| Protocol Support | Modbus TCP, TCP Server/Client, UDP Server/Client |
| AN-IP-2-RS232-485-M | RS232 RS485 to Ethernet Converter | Dual Serial Device Server with Modbus TCP RTU Support |
Description
Industrial RS-232 & RS-485 to Ethernet Device Server
The AN-IP-2-RS232-485-M is a professional-grade serial device server that enables seamless integration of RS-232 and RS-485 equipment into Ethernet networks. Designed for industrial environments, it allows legacy serial devices to communicate over TCP/IP infrastructure without system redesign.
Ideal for:
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PLC and SCADA integration
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Smart meters and industrial sensors
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Building automation systems
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Access control and barcode systems
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Remote monitoring applications
Dual Serial Ports – Simultaneous Operation
This unit features:
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1 × RS-232 port (up to 256 Kbps)
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1 × RS-485 port (up to 921.6 Kbps)
Both ports can operate simultaneously without switching, allowing flexible deployment in mixed serial environments.
Built-in Modbus RTU to Modbus TCP Gateway
The device supports transparent conversion between:
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Modbus RTU (serial side)
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Modbus TCP (Ethernet side)
This makes it especially suitable for upgrading legacy Modbus RTU equipment to IP-based SCADA systems without replacing field devices.
Supported communication modes:
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TCP Server
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TCP Client
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UDP Server
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UDP Client
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Transparent Transmission Mode
Multiple simultaneous TCP connections are supported for multi-host access.
Industrial-Grade Design & Protection
Engineered for reliability in harsh environments:
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ARM Cortex-M4 processor
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Fanless metal housing
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DIN rail mounting
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Wide 6–70V DC power input
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Surge, overload, and reverse polarity protection
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6kV surge protection on serial ports and power input
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Operating temperature: -40°C to +85°C
Designed for control cabinet installation and long-term stable operation.
Flexible Power & Easy Configuration
The unit accepts a wide DC input range and can be powered from:
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Industrial DIN rail power supplies
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Standard 24V DC systems
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Included AC power adapter (for quick setup)
Configuration options:
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Built-in Web UI
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Windows configuration utility
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Serial console setup
Supports DHCP or Static IP configuration for easy network integration.
FAQ
Can this device work with both RS-232 and RS-485 at the same time?
Yes. It has one RS-232 and one RS-485 port that operate independently, allowing simultaneous use.
Is it compatible with Modbus devices?
Yes. It supports Modbus RTU to Modbus TCP conversion and works in TCP Server/Client and UDP modes.
What power supply can I use?
It accepts 9–70V AC/DC, with built-in surge, overload, and reverse polarity protection.
How can I configure the device?
You can set it up via web interface (preferred) , Windows utility, or serial console. Common settings include IP address, baud rate, and protocol mode.
Will it work in harsh environments?