Panic Button DAHUA ASF921 — alarm button, green plastic housing, 86×86×50 mm

DAHUA ASF921 panic button is a wall-mounted emergency switch intended for alarm and access control systems. The device comes in a compact green plastic housing measuring 86×86×50 mm and is designed to provide a clearly visible, manually operated trigger for alarms or emergency signals in commercial and residential installations. The mechanical operation is simple and the housing uses fire-retardant material to meet safety requirements.

Advantages

The panic button uses photoelectric control technology to reduce the risk of mechanical failure and prolong service life. It supports normally open and normally closed contact configurations, allowing flexible integration into different alarm and access control circuits. The unit has passed extensive fatigue testing and is specified for high durability. Its compact dimensions and standard wall-mount format make installation straightforward in a variety of locations.

Suitable for

• Alarm systems in offices, shops and public buildings
• Residential emergency alarm points
• Access control installations requiring manual emergency override
• Service counters and staff-only areas for rapid alarm activation

Key specifications

• Housing material: green, fire-retardant plastic
• Mounting type: wall-mounted, compact 86 × 86 × 50 mm enclosure
• Control method: photoelectric control technology to reduce mechanical wear
• Contact configurations: selectable normally open (NO) and normally closed (NC)
• Durability: designed and tested for repeated operation (high cycle fatigue testing)
• Application: designed as an accessory for alarm and access control projects

How to use

Install the ASF921 on a vertical surface at an accessible height following local electrical and safety regulations. Connect the device into the alarm or access control circuit using the appropriate wiring for NO or NC contact operation as required by the system. Verify wiring and function with the system in a non-armed state before commissioning. The button is operated manually by pressing the front actuator to trigger the alarm input; mechanical simplicity ensures intuitive use under stress.

Usage recommendations

Position the panic button where it is clearly visible and easily reachable, and label it if required by site procedures. Test the unit periodically as part of scheduled maintenance to confirm contact function and overall integrity. Avoid exposure to direct water spray; if installed in damp environments, ensure appropriate protective measures or enclosures are used.