Black Box LES431A
MODBUS RS232/422/485 Serial Server – TCP ASCII – Industrial Serial-to-Ethernet Conversion
The Black Box LES431A is a versatile serial server designed to connect legacy RS232/422/485 serial devices to modern Ethernet TCP/IP networks. It supports MODBUS protocol in ASCII and RTU modes, enabling seamless integration of industrial automation devices into IP-based systems.
Features :
This serial server facilitates communication between serial devices such as PLCs, sensors, and controllers, and Ethernet-based SCADA or monitoring systems. By converting serial data streams into TCP/IP packets, the LES431A allows centralized management and remote access over standard networks. Supporting multiple serial standards (RS232, RS422, RS485), it provides compatibility with a wide range of serial equipment.
Advanced Options :
The device’s support for MODBUS ASCII and RTU protocols ensures interoperability with many industrial control systems. The server’s configuration is accessible via an intuitive web interface, allowing easy setup of communication parameters, IP settings, and protocol options. Its industrial-grade construction suits deployment in factory floors, process control, and automation environments.
Product Key Features
- Supports RS232, RS422, and RS485 serial interfaces
- MODBUS protocol compatible for industrial automation
- Converts serial data to TCP/IP for Ethernet networks
- Supports ASCII and RTU communication modes
- Configurable via web interface for flexible deployment
- Robust design for industrial serial device networking
Reliability & Performance :
Built for dependable industrial use, the LES431A features robust hardware designed to operate reliably in harsh environments. It maintains stable, low-latency data transmission and supports multiple simultaneous TCP connections for efficient network utilization. Its flexible serial interface options and MODBUS protocol support ensure broad compatibility and network integration.
Key Features :
- Supports RS232, RS422, RS485 serial interfaces
- MODBUS protocol compatible (ASCII and RTU modes)
- Serial-to-Ethernet conversion with TCP/IP support
- Web-configurable interface for easy setup
- Industrial-grade design for reliable operation
- Multiple simultaneous TCP client connections





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