6HBWDOG1 Watchdog Relay

The Red Lion heartbeat relay module is used as a failsafe system to monitor and shut down a PLC or RTU based automation system in the event of a malfunction in the processor controlling the system. 

A secondary safety check is the most economical way to achieve system safety shutdown. This is accomplished is by powering the control system through the internal 10A rated relay built into the watchdog module. 

Loss of processor control is detected by monitoring a discrete output signal designated as the “Heartbeat” which toggles on and off under processor control. 

If the processor malfunctions, the heartbeat will cease to toggle and the Heartbeat Watchdog Module will sense this failure and shut down the system by opening the relay powering the system. 

The Heartbeat Watchdog Module is designed for extreme reliability, using no microprocessor or other programmable logic elements in its design. 

Using hard wired logic elements in place of CPU and memory based circuitry removes the possibility of program bugs or memory failure disrupting the operation of the module.