Description
The DHI-ARM9A4-P-W2(868) from Dahua is a wireless IO expansion module that integrates wired detectors and sirens into a wireless alarm system. With support for both RF and network communications and various power options (PoE, AC and optional battery), this transmitter forms 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 of existing installations.
Specifications:
• General
• Product: DHI-ARM9A4-P-W2 (868)
• Type: Dahua Wireless Multi IO Transmitter
• Scenario: 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
• Distance update: Supported (cloud update)
• Low battery detection: Yes
• Tamper protection: Yes
• Carrier frequency: 868MHz
• Transmit Power (EIRP): Max. 25mW
• Communication distance (RF): Up to 1,600 m (open field)
• Communication mechanism: Two-way
• Encryption: AES128
• Frequency hopping: Yes
• Nutrition: 100–240 VAC, PoE (802.3at)
• Power type: Type A
• Standby time: Up to 30 hours (on static standby)
• Battery Threshold (Low): 11,000 mV
• Battery Threshold (Recovery): 12,000 mV
• Power consumption:
• 220 VAC rest: 40 mA / max: 315 mA
• PoE rest: 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 cover)
• Net weight: 1.22 kg
• Gross weight: 1.78 kg
• Installation: Wall mounting
• Housing: PC + ABS
• Color: White
• Certification:CE
