The DHI-ARM310-W2 is a compact wireless input expander designed to integrate traditional wired detectors into modern wireless alarm systems. It bridges legacy sensors with RF-based hubs, offering features like tamper detection, signal monitoring, temperature sensing, and cloud updates. Ideal for upgrading older systems or expanding new ones without rewiring.
Key Features
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Multi-Type Alarm Input: Supports intrusion, fire, gas, emergency, medical, and tamper alarm types for flexible integration.
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NO/NC Support: Compatible with both normally open and normally closed input types.
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Wireless Bridging for Wired Devices: Converts traditional detectors into wireless-capable nodes.
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Tamper & Signal Monitoring: Detects tampering and checks signal strength for better system reliability.
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Low Battery Alerts: Warns users of power issues before they cause failures.
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Temperature Sensor Built-In: Adds thermal monitoring to your alarm system (–15 °C to +65 °C).
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Cloud-Based Firmware Updates: Remote updates reduce truck rolls and ensure the device stays secure.
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Long-Range Two-Way RF: Up to 1,000 m communication distance with frequency hopping for stable connections.
Perfect For:
- Converting legacy wired PIR or magnetic sensors to work with Dahua RF alarm hubs
- Wireless security upgrades in apartments and villas
- Installing intrusion systems in small businesses or retail stores
- Expanding input zones on wireless alarm kits
- Any site needing wireless integration but with existing wired sensors
Install Tips
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Use with dry-contact devices only (e.g. PIRs, reed switches) — not for powered outputs.
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Select NO or NC input depending on your sensor type before pairing.
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Mount in an indoor, dry location — rated for indoor use only.
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Ensure RF signal is strong using test mode before final placement.
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Use cloud firmware updates to keep firmware current post-deployment.
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Ideal for linking hardwired legacy zones to a Dahua wireless alarm hub without rewiring.
Downloads
Quick-Read Specs Card
| Features |
Detail |
| Input Type |
1x Dry contact input (NO default, NC optional) |
| Alarm Types |
Intrusion, Fire, Gas, Medical, Emergency, Tamper |
| RF Range |
Up to 1,000 m (open space) |
| Wireless Tech |
Two-way RF, 433.1–434.6 MHz, AES128, Frequency Hopping |
| Tamper Detection |
Yes |
| Battery Type |
CR123A |
| Battery Life |
4 years (NO) / 2 years (NC or Pulse) |
| Temperature Sensor |
Yes (–15 °C to +65 °C) |
| Mount Type |
Bracket Mount |
| App Setup |
DMSS (iOS/Android) |
Extra Info
Smart Wireless Conversion
The ARM310-W2 allows you to modernise existing alarm inputs without replacing your sensors. It transmits dry contact events wirelessly, making it ideal for hybrid alarm setups where new cabling isn't feasible.
Signal Strength Detection
The included signal test mode helps ensure your install location has reliable communication with the alarm hub — essential for consistent performance in larger buildings.
Battery-Saving Design
With a low-power design and battery life up to 4 years (depending on input type), this device is truly install-and-forget. It also supports battery level reporting and low battery alerts via app.
Secure, Encrypted Communication
The two-way RF signal uses AES128 encryption and frequency hopping, reducing the risk of jamming or interference in busy wireless environments.
Thermal Monitoring
An integrated temperature sensor expands the use case — allowing the same unit to double as an environmental detector in server rooms, storage, or sensitive areas.
Q&A
Q: Can I use this to make an old PIR wireless?
Yes — this device turns any dry-contact sensor into a wireless device compatible with Dahua RF alarm hubs.
Q: Does it support both NO and NC sensors?
Yes, it supports both normally open and normally closed inputs — NO is the default setting.
Q: How far can it communicate with the hub?
It can transmit up to 1,000 meters (open space), thanks to its frequency-hopping two-way RF system.
Q: Will it alert me if someone tampers with it?
Yes — it includes tamper detection and will send an alert if removed or opened.
Q: Can I see battery status from the app?
Yes — the battery level is displayed in the DMSS app, and low battery alerts are also sent.
Q: Does it support OTA firmware updates?
Yes — cloud firmware updates are supported, with automatic recovery in case of failures.
Q: Is it indoor only?
Yes — it’s designed for indoor use only. Keep it away from rain or moisture.
