Alarm Watchdog Controller Design

Main Functions

  1. Emergency shut-off for critical failures
  2. Alarm notification (buzzer, display)
  3. Alarm override

Input Pins

  1. O2 Alarm <- O2 Sensor
  2. Flow Alarm <- Flow Sensor
  3. Pressure Alarm <- Pressure Transducer
  4. Temp. Alarm <- Temperature Sensor
  5. Low Battery Alarm <- Power Controller
  6. Battery Over-temp Alarm <- Batt. Temp Sensor
  7. Mains Power Loss Alarm <- Power Controller
  8. Alarm Override <- Input Panel

Output Pins

  1. O2 Alarm -> Display
  2. Flow Alarm -> Display
  3. Pressure Alarm -> Display
  4. Temp. Alarm -> Display
  5. Low Battery Alarm -> Display
  6. Battery Over-temp Alarm -> Display
  7. Mains Power Loss Alarm -> Display
  8. Buzzer

Critical Features

  1. Separate battery circuitry