Patlite Adds Ethernet-Based LR5-LAN Signal Tower for Industrial Networks

Patlite Pushes Stack Light Signaling Further Into Ethernet Networks

Patlite has expanded its LR5 signal tower portfolio with the introduction of the LR5-LAN Series Φ50 LED stack light, bringing direct Ethernet communication into machine signaling applications. Instead of relying on discrete PLC outputs and dedicated wiring, the new tower communicates directly across industrial Ethernet networks using protocols including HTTP(S), Modbus/TCP, socket communication, and EtherNet/IP.

This shift reflects a broader trend inside modern automation systems where signaling devices increasingly operate as intelligent network nodes rather than passive field devices. For manufacturers building scalable Ethernet architectures, the LR5-LAN removes additional I/O hardware while simplifying future expansion.

The LR5-LAN Series integrates traditional stack light functionality directly into industrial Ethernet systems.

Moving Beyond Traditional Discrete Wiring

Conventional stack lights typically depend on discrete digital outputs from PLC systems. That approach increases wiring complexity and consumes valuable I/O resources, especially in large production lines with multiple signaling stations.

The LR5-LAN changes this architecture by enabling direct communication through Ethernet-based protocols. The result is reduced cabinet wiring, fewer intermediary modules, and simplified maintenance procedures for controls engineers.

Facilities already using Allen-Bradley ControlLogix systems or distributed Ethernet control platforms can integrate the tower directly into existing plant communication structures without additional hardwired signaling outputs.

Two Ethernet Variants for Different Control Strategies

Patlite offers the LR5-LAN in two versions. The standard LAN model supports socket communication, HTTP(S), and Modbus/TCP. The EtherNet/IP version focuses on direct PLC integration and supports EDS file registration for faster deployment inside engineering software.

Once network parameters are assigned, engineers can configure the tower directly from PLC programming environments. This approach shortens commissioning time and minimizes manual parameter mapping.

EDS-based integration helps accelerate deployment inside EtherNet/IP automation systems.

Built-In Web Configuration Reduces Engineering Time

One practical advantage of the LR5-LAN is its embedded web server. Engineers can access the device through a browser interface, generate commands directly from the configuration screen, and validate signaling behavior without manually referencing protocol documentation.

For industrial PC environments, Patlite also provides sample source code for Windows and Linux systems. This makes the device particularly useful for software-centric automation platforms and edge computing applications.

Manufacturers expanding their industrial communication and networking infrastructure may find this approach beneficial because it reduces dependence on physical signal wiring while supporting remote diagnostics.

Integrated Flashing and Audible Signaling

The LR5-LAN supports up to five light tiers and includes seven predefined LED flash patterns. These patterns can be triggered directly through Ethernet commands instead of requiring PLC timing logic or pulse programming.

Optional buzzer modules further expand the signaling capability. Both visual and audible alarms can be activated remotely through network communication, which improves flexibility in machine status management.

The LR5-LAN can visually indicate communication loss or network recovery conditions in real time.

Network Visibility Becomes Part of Machine Diagnostics

One of the more important engineering additions is the built-in network monitoring capability. The LR5-LAN can monitor Ping responses or supervise Modbus/TCP connections continuously. If communication fails or reconnects, the tower automatically triggers predefined signaling responses.

This transforms the stack light into a basic network diagnostic tool rather than a simple operator indicator. In facilities with distributed automation systems, communication loss detection becomes increasingly important as more devices shift toward Ethernet-based architectures.

The device operates on 24 VDC power, carries an IP65 environmental rating, and supports operating temperatures from -20°C to +50°C, making it suitable for direct machine mounting in most industrial environments.

Why Ethernet-Based Signaling Matters

The LR5-LAN represents a larger transition occurring across industrial automation. Devices that once relied entirely on hardwired I/O are now becoming Ethernet-aware endpoints capable of direct communication, monitoring, and diagnostics.

As factories continue adopting distributed control systems, edge devices, and industrial PCs, signaling hardware must integrate into the same infrastructure instead of remaining electrically isolated components. Ethernet-based stack lights reduce panel complexity while supporting faster scalability.

From an engineering perspective, this approach makes the most sense in facilities already standardized around EtherNet/IP or Modbus/TCP architectures. The reduction in wiring, terminal management, and output card usage can significantly simplify long-term maintenance.

Author: Daniel Mercer | Senior Automation Systems Reporter

Daniel Mercer has 14 years of experience covering industrial control systems, Ethernet networking, and machine automation technologies. His background includes field integration projects involving Rockwell Automation, Siemens, Beckhoff Automation, and Schneider Electric platforms across packaging, automotive, and process manufacturing industries.