Dahua DHI-ARM320-W2(868) - AirShield Wireless Input Expander
Product Features
- Wireless input expander for Dahua AirShield alarm systems
- Supports six alarm types: intrusion, medical, fire, emergency, gas, tamper
- Two-way encrypted wireless communication (AES128), up to 1600m range
- Triaxial accelerometer triggers alarm if moved, 5-year battery life
Dahua DHI-ARM320-W2(868) — AirShield Wireless Input Expander
The DHI-ARM320-W2(868) is a wireless input expander for Dahua's AirShield alarm range, letting a third-party wired detector or button connect into the wireless alarm system. It supports six alarm types (intrusion, medical, fire, emergency, gas, tamper) over encrypted two-way 868MHz wireless, with a triaxial accelerometer that triggers an alarm if the unit itself is moved.
Who is it for?
Where an existing wired detector, panic button or third-party device needs to report into a Dahua AirShield wireless alarm panel, this expander bridges the gap — avoiding a full rewire while keeping the wireless system's central monitoring and app alerts.
Key specification
| Alarm Input | 2 (1 for alarm, 1 for anti-tamper) |
|---|---|
| Alarm Types Supported | Intrusion, medical, fire, emergency, gas, tamper |
| Wireless | 868.0–868.6 MHz, two-way, AES128 encryption, frequency hopping |
| Range | Up to 1600m in open space |
| Sensor | Triaxial accelerometer — alarms if device is moved |
| Power | 3 x CR123A battery, up to 5 years life |
| Auxiliary Output | 3.3V, up to 10mA |
| Environment | -10°C to +55°C, indoor use |
| Dimensions / Weight | 102 x 39 x 21.5mm, 77g net |
What you will need
- A Dahua AirShield wireless alarm hub/panel to pair the expander with
- 3 x CR123A batteries (included with the unit's design, replaceable)
- The wired detector, button or third-party device you want to bridge into the wireless system
Frequently asked questions
What does an input expander do?
It lets a wired detector, panic button or other device report into a wireless AirShield alarm system without needing a wired connection back to the main panel.
How long does the battery last?
Up to 5 years on 3 x CR123A batteries under normal use (4 years if the input type is set to pulse).
What happens if someone tampers with it?
The built-in triaxial accelerometer raises an alarm if the unit is moved, plus a dedicated tamper input.
Browse the full Dahua range, contact us on 01902 902251, or visit our Wolverhampton trade counter.
| Product Code | DHI-ARM320-W2(868) |
|---|---|
| Manufacturer | Dahua |
| Colour | Brown |
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