Monitor and control field devices such as sensors, push buttons, alarms, locks and motors over copper and fiber Ethernet with real time alerts.

When your fiber network demands high performance and certified quality, Slimline Patch Panels deliver.

Choose from a wide variety of cable types and custom specifications using one of our online configurators to factory build your next fiber cable assembly.

RLH offers a full line of compact and rugged Contact Closure Fiber Optic Converters designed for automation control and security applications.

RLH’s latest release of its Smart Series line of Ethernet I/O products adds DNPv3 TCP Protocol support.

RLH is pleased to announce significant updates to our Power over Fiber system (PoF).