ARM9A4-P-W2, Wireless Multi IO Transmitter, PoE

Dahua's DHI-ARM9A4-P-W2(868) is a wireless IO expansion module that integrates wired detectors and sirens into a wireless alarm system. With support for both RF and network communication and various power options (PoE, AC and optional battery), this transmitter provides a flexible bridge between old and new systems. With 16 alarm inputs, 4 relay outputs and 2 auxiliary connections, it is ideal for cost-efficient upgrades to existing installations.

Specifications:

General
- Product: DHI-ARM9A4-P-W2 (868)
- Type: Dahua Wireless Multi IO Transmitter
- Scenario: Indoor (indoors)

- Alarm Inputs: 16 channels, 1-6 channels support pulse detection, 0EOL/EOL/2EOL/3EOL
- Alarm Outputs: 4 relay outputs (max. 30 VDC, 3A)

- Network Mode: Ethernet
- Network Port: 1 × RJ-45 10/100 Mbps (PoE)

- Auxiliary power supply: 2 outputs 14.5V, max. 1 A (PoE), 2 A (non-PoE)

- Buttons:
- 1 × switch button
- 1 × reset button

- Status indicator: 1 × LED
- Remote update: Supported (cloud update)
- Low battery detection: Yes
- Sabotage protection: Yes

- Carrier frequency: 868 MHz
- Transmission power (EIRP): Max. 25 mW
- Communication distance (RF): Up to 1,600 m (open field)
- Communication mechanism: Two-way
- Encryption: AES128
- Frequency Hopping: Yes

- Power supply: 100-240 VAC, PoE (802.3at)
- Power supply type: Type A
- Standby time: Up to 30 hours (at static standby)
- Battery threshold (low): 11.000 mV
- Battery threshold (recovery): 12,000 mV

- Current consumption:
- 220 VAC idle: 40 mA / max: 315 mA
- PoE idle: 125 mA / max: 612 mA

- Operating temperature: -10 °C to +50 °C
- Operating humidity: 10%-90%
- Storage temperature: -10 °C to +55 °C
- Storage humidity: 10%-90%

- Protection: IP30
- Anti-corrosion level: Basic protection

- Product dimensions (L×W×H): 304 × 235 × 90.8 mm

- Packaging dimensions:
- 269 × 140 × 280 mm (standalone)
- 585 × 443 × 399 mm (protective case)

- Net weight: 1.22 kg
- Gross weight: 1.78 kg

- Installation: Wall mount
- Housing: PC + ABS
- Color: White
- Certification: CE