In modern industrial and automation networks, reliable communication with serial devices continues to play a key role. The Com-Server LC from Wiesemann & Theis enables serial devices such as controllers, sensors, and measurement systems to be easily connected to an Ethernet network via TCP/IP. The device combines a compact design, industrial robustness, and versatile network functions in a system that is simple to configure.

With support for RS232, RS422, and RS485 interfaces, virtual COM ports, box-to-box communication, and TLS encryption, the Com-Server LC bridges the gap between traditional serial communication and the connected world of Industry 4.0 and the Internet of Things (IoT).

Serial communication in modern networks

The Com-Server LC acts as a bridge between a serial device and the Ethernet network. It enables serial RS232, RS422, or RS485 connections to be network-enabled without requiring any changes to existing hardware or software. Through virtual COM port redirection, Windows applications can continue communicating with the serial device as if it were connected locally, allowing existing software to run unchanged.

This feature is particularly useful for virtual systems such as VMware or Hyper-V environments where no physical COM ports are available. Optional TLS encryption secures communication and protects data from unauthorized access – a crucial advantage when handling control data or operating remotely in distributed systems.

Box-to-box connection: transfer serial data via IP

The integrated box-to-box mode allows two Com-Server LC units to establish a transparent data channel over TCP/IP. This creates a serial point-to-point connection over the network, replacing long serial cables and enabling communication between devices located at distant sites.

The connection operates bidirectionally, independently of operating systems, and includes automatic reconnection functions to ensure data exchange continues reliably after network interruptions. Optionally, data transfer can be secured using TLS – an ideal solution for safety-critical applications in industrial control networks.

Flexible TCP/UDP socket communication

For developers and system integrators, the Com-Server LC offers direct TCP and UDP socket communication for integrating serial devices into custom applications. This allows software solutions to process or route serial data streams according to specific needs.

• TCP server: waits for incoming client connections and processes serial data in real time
• TCP client: actively establishes connections to remote endpoints to send data
• UDP mode: suited for latency-sensitive applications that benefit from connectionless communication

With support for multipoint operation and packetization, data can be distributed to multiple receivers or transmitted with optimized timing – especially useful for measurement systems or parallel control processes.

Robust interfaces and industrial standard

The Com-Server LC hardware is designed for long-term industrial operation. The rear serial interface can be switched between RS232, RS422, and RS485 – or optionally configured as a 20 mA/TTY version. The Ethernet interface (10/100BaseT) supports autosensing and auto-MDIX for simplified cabling.

Thanks to Power-over-Ethernet (PoE), the device can be powered directly through the network connection, eliminating the need for an external power adapter. Alternatively, a screw terminal is available for external power supplies between 12 V–48 V DC. The galvanically isolated power input adds stability and protection against voltage spikes.

Plug & play setup with WuTility software

Commissioning the Com-Server LC is quick and simple. Using the Wiesemann & Theis WuTility software, the device is automatically detected and configured in just a few clicks. Web-based management, Telnet, or control sockets are then available for advanced settings.

Through the web interface, users can manage network parameters, COM port profiles, encryption, and box-to-box connections. Optional DHCP support enables dynamic IP assignment, while remote configuration can be performed from any network location.

Comparison with other serial network adapters

The Com-Server LC is a cost-efficient solution when only one serial device needs to be connected to the network. Larger models, such as the Com-Server PoE 3x Isolated, offer multiple ports but are more complex. With plug & play integration, TLS encryption, and multipoint operation, the Com-Server LC combines essential features in a compact format.

Unlike simple USB adapters, it offers industrial-grade performance – high EMC resistance, stable power supply, and a rugged metal housing with DIN rail mounting for professional use.

Application examples and industries

Thanks to its versatility, the Com-Server LC is suitable for numerous applications:

• Industrial automation: integration of serial controllers and measurement systems into IP-based networks
• Remote I/O systems: linking remote sensor stations via box-to-box IP tunnels
• IT and server technology: access to serial service ports of network devices or console server functionality
• Data logging: capturing serial data from scales, scanners, or barcodes for centralized archiving
• IoT integration: networking legacy serial devices with modern cloud and control systems

Industrial robustness and standards compliance

The Com-Server LC is manufactured in accordance with relevant industrial standards and certified for EN 61000-6-2 (immunity) and EN 55032:2015 + A1 Class B (emissions). These features ensure reliable operation even in demanding EMC environments. The device is designed for DIN rail mounting, allowing space-saving installation in control cabinets.

Reliability and warranty

Like all Wiesemann & Theis products, the Com-Server LC is built for continuous 24/7 operation. Its robust construction and high-quality design ensure long-term stability. The device is delivered with a five-year manufacturer’s warranty, underscoring its quality and durability for industrial applications.

Flexible serial communication over IP

The Com-Server LC from Wiesemann & Theis connects traditional serial devices to modern IP networks. Featuring virtual COM ports, box-to-box links, and TCP/UDP socket communication, it allows flexible integration into any industrial or IT environment.

With Power-over-Ethernet, secure TLS encryption, and easy plug & play operation, it provides a professional solution for Industry 4.0 and automation applications. The Com-Server LC is a compact, efficient, and future-proof tool for engineers and network administrators alike.