Dahua DHI-ARM320-W2(868) - 868MHz AirShield Wireless Alarm Input Expander
Product Features
- Dahua DHI-ARM320-W2(868) AirShield wireless alarm input expander, 868MHz, for a Dahua alarm hub.
- Connects third-party detectors, with 1 alarm input and 1 anti-tamper input.
- Six alarm types: intrusion, medical, fire, emergency, gas and tamper.
- Triaxial accelerometer raises an alarm if the device is moved.
- Two-way AES128 wireless up to 1,600m. 3 x CR123A batteries last up to 5 years.
Dahua DHI-ARM320-W2(868) — Wireless Alarm Input Expander
The Dahua DHI-ARM320-W2(868) is an AirShield wireless alarm input expander, a conversion device that connects third-party detectors to a Dahua wireless alarm hub. When the third-party detector triggers, the expander sends the signal to the hub over 868MHz wireless and the hub reports it to platforms. Different alarm types can be configured in the DMSS app depending on the detector connected. An input channel is also provided for the tamper port of the detector, and a triaxial accelerometer inside the expander guards against it being moved.
Also listed as ARM320-W2(868).
Key features
- Six types of alarm: intrusion, medical, fire, emergency, gas and tamper.
- Two inputs: 1 for alarm and 1 for anti-tampering.
- Triggers an alarm when the device is moved, and when it overheats.
- Connects to external power supplies and can provide power to connected detectors (3.3V, up to 10mA).
- Two-way encrypted wireless (AES128) with frequency hopping to stay clear of interference, up to 1,600m in open space.
- Cloud update.
- Powered by 3 x CR123A batteries: up to 5 years (4 years if the external input type is pulse).
Technical specification
| Model | DHI-ARM320-W2(868) |
|---|---|
| Type | Wireless input expander |
| Alarm input | 2 (1 for alarm and 1 for anti-tampering) |
| Auxiliary power output | 3.3 V, up to 10 mA |
| Alarm types | Intrusion, medical, fire, emergency, gas, tamper |
| Button | 1 × power button |
| LED indicator | 1 × green alarm indicator |
| Sensor | Triaxial accelerometer |
| Remote update | Cloud update |
| Low battery detection | Yes |
| Tamper | Yes |
| Wireless carrier frequency | 868.0 MHz-868.6 MHz |
| Transmitter power (EIRP) | Limit 25 mW |
| Communication mechanism | Two-way |
| Communication distance | Up to 1600 m (5249.34 ft) in an open space |
| Encryption mode | AES128 |
| Frequency hopping | Yes |
| Power supply | 3 × CR123A battery |
| Battery life | 5 years (4 years if the external input type is pulse) |
| Operating temperature | -10 °C to +55 °C (indoor) |
| Operating humidity | 10%-90% (RH) |
| Product dimensions | 102 mm × 39 mm × 21.5 mm |
| Net weight | 77 g |
| Installation | Surface mount, or mount inside a third-party device |
| Certifications | CE; EN 50131 Security Grade 2; Environmental Class II |
Works with
Common questions
What does an input expander do?
Dahua describes it as a conversion device that connects third-party detectors to a Dahua wireless hub. When the detector alarms, the expander sends the signal to the hub through RF and the hub reports it to platforms.
Which alarm types can I set?
Six: intrusion, medical, fire, emergency, gas and tamper. They are configured in the DMSS app according to the detector you connect.
What happens if someone moves or tampers with it?
It has a triaxial accelerometer that triggers an alarm when the device is moved, and an input channel for the tamper port of the connected detector.
How long do the batteries last?
It takes 3 CR123A batteries. Dahua quotes 5 years, or 4 years if the external input type is pulse.
Can it power the detector it is connected to?
Dahua says it can also provide power for detectors connected to it, through a 3.3V auxiliary output of up to 10mA.
Does it need an alarm hub?
Yes. It connects third-party detectors to a Dahua wireless hub, so you need an 868MHz hub to pair it with.
Full manufacturer specification: Dahua product page
Supplied by Zenith Security Co, Wolverhampton. We deliver to England, Scotland and Wales, or you can collect from our Wolverhampton trade counter (please call first).
Browse the full Dahua range, the Intruder alarms category, or contact us on 01902 902251 or visit our Wolverhampton trade counter for advice.
Browse the range: Dahua AirShield alarms · Dahua cameras.
| Product Code | DHI-ARM320-W2(868) |
|---|---|
| Brand | Dahua |
| Product Type | Intruder & Smoke Alarm |
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