Dahua Alarm Box

Dahua alarm expansion box, an accessory that adds extra alarm inputs and relay outputs to a compatible Dahua NVR or DVR.

• Connects to the host recorder's RS-485 alarm bus, extending its alarm input/output capacity beyond what's built into the recorder itself
• Used to wire in external sensors (door contacts, PIRs), sirens, or relay-triggered devices such as access control
• Multiple boxes can typically be daisy-chained and address-set for larger installations

Suited to sites that need more alarm I/O than their recorder provides natively, such as linking perimeter sensors or sounders into the recording system.