Circuit to prevent opening if power supply should fail - SmartOutput module with SmartRelay 3

The AUX relay can be used in conjunction with the low voltage switching output (OUT) to prevent actuators, such as a buzzer or an electric strike, from switching of their own accord if the power supply to the SmartOutput module is interrupted. This ensures that actuators will not be powered and will not switch either if the SmartOutput module's power supply fails. This circuit is suitable for handling power supply failures in the SmartOutput module.