DS1 is which type of indicator?

• A. Flag Drop Indicator
• B. Power Indicator
• C. Airflow Alarm Indicator
• D. Local Audible Alarm

Answer: (B)

DS1 is the Power Indicator. The main idea here is that a power indicator shows that the device is energized and ready to operate. When DS1 is illuminated, you can trust the unit has power, which is the first thing you verify before troubleshooting or using any other features. If DS1 isn’t lit, you know there’s a power issue—perhaps a blown fuse, a disconnected power cord, or a mains problem—that must be fixed before you can rely on the device’s sensors or alarms. Other indicators in a panel serve different purposes: one would signal a drop event in a system that tracks flag or payload status, another would warn about insufficient airflow which can affect performance but doesn’t confirm power, and a Local Audible Alarm is a separate audible alert for faults or hazards. In short, DS1’s job is simply to show that power is present.