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Dahua DHI-ARM320-W2 Wireless Input Expander


The Dahua DHI-ARM320-W2 Wireless Input Expander is a versatile device designed to integrate third-party detectors into Dahua’s wireless security systems. It supports six types of alarms: intrusion, medical, fire, emergency, gas, and tamper. With a two-way wireless encrypted communication mechanism and frequency hopping technology, it ensures stable and secure communication even in environments with wireless interference. The device operates on three CR123A batteries, providing a long battery life of up to 5 years. It also features a triaxial accelerometer to detect unauthorized movement, triggering alarms accordingly. The expander can be powered by external supplies and sends alarm signals through RF to the hub, which then relays them to platforms like the DMSS app. The device is also cloud-updateable, making it easy to keep firmware up to date.

Key Features

  • Six types of alarms: Intrusion, medical, fire, emergency, gas, and tamper.
  • Connects to external power supplies.
  • Triggers alarms when the device is moved.
  • Alarms go off when the device overheats.
  • Cloud update.
  • The two-way wireless encrypted communication mechanism improves the security and stability of communication.
  • With the wireless frequency hopping mechanism, the device automatically hops to other available frequency bands when the original frequency band is being interfered with by other wireless radios, ensuring smooth communication.

DHI-ARM320-W2 Datasheet

$41.85 inc GST +3 Year Warranty & Support

The Dahua DHI-ARM320-W2 Wireless Input Expander is a robust solution for connecting third-party sensors to Dahua’s wireless hubs. It supports multiple alarm types, including intrusion, fire, medical, gas, tamper, and emergency alarms, making it versatile for various security scenarios. The device communicates with the hub using two-way encrypted wireless transmission, enhancing security and reliability. Frequency hopping technology allows the expander to avoid interference from other wireless devices, maintaining smooth communication. Powered by three CR123A batteries, it offers a battery life of up to five years, and it also has an external power option. The built-in triaxial accelerometer detects tampering or unauthorized movement, triggering alarms if needed. Additionally, the device can send real-time updates via cloud connectivity, ensuring firmware stays current. The expander’s compact design allows for easy surface mounting or installation within third-party equipment.

Dimension

Technical Specifications

Port
Alarm Input 2 (1 for alarm and 1 for anti-tampering)
Auxiliary Power Output 3.3 V, up to 10 mA
Function
Button 1 × power button
Remote Update Cloud update
Low Battery Detection Yes
Tamper Yes
Measuring Range (Temperature) –10 °C to +55 °C (+14 °F to +131 °F) (indoor)
Technical
Sensor Triaxial accelerometer
Test Mode Yes
LED Indicator 1 × green alarm indicator
Scenario Indoor
Operating Current 45 uA (with 1 min heartbeat, normally open mode, charge not being provided for other devices and device moved alarm not enabled)
Alarm Current 50 mA
Wireless
Carrier Frequency 433.1 MHz–434.6 MHz
Communication Mechanism Two-way
Communication Distance Up to 1300 m (4265.10 ft) in an open space
Encryption Mode AES128
Frequency Hopping Yes
General
Power Supply 3 × CR123A battery
Battery Model CR123A
Battery Life 5 years (4 years if the external input type is pulse)
Power Consumption Max. 150 mW (without providing charge for other devices)
Operating Temperature –10 °C to +55 °C (+14 °F to +131 °F) (indoor)
Operating Humidity 10%–90% (RH)
Product Dimensions 102 mm × 39 mm × 21.5 mm (4.02″ × 1.54″ × 0.85″)
Net Weight 77 g (0.17 lb)
Gross Weight 135 g (0.30 lb)
Installation Surface mount, or mount inside a third-party device
Certifications CE
Anti-corrosion Level Basic Protection
Packaging Dimensions 95 mm × 43 mm × 139 mm (3.74″ × 1.69″ × 5.47″)

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