redlion® Watchdog Relay is the industry's only rugged hardware-based solution that reliably monitors and provides fail-safe shutdown of processes controlled by RTUs, PLCs and other automation devices. By monitoring the pulsing output heartbeat of a connected device, Watchdog Relay adds an extra level of safety that helps protect critical processes. If the heartbeat stops for reasons that may include power surges, extreme weather or device malfunctions, watchdog's built-in form C relay will immediately energize and provide a signal that can be used to safely shut down the process. The signal sent upon loss of control helps to avoid costly damage to materials and equipment.