ARM708-RS - is an expansion module for wired alarm control panels, capable of adding eight alarm outputs via RS‑485, ideal for expanding the system up to 72 zones. Each output can be configured as Normally Open (NO) or Normally Closed (NC) via jumpers, and the address is set via DIP switches. Powered by 12 V DC , it requires only 1.8 W of power and supports remote firmware updates. Designed for the ARC series (ARC3008, ARC2008, etc.), it is perfect for residential or commercial applications, ensuring flexible and reliable management of alarm outputs.
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ARM708-RS | 8 OUTPUT EXPANSION FOR ALARM

The Dahua ARM708‑RS is a compact module that extends the functionality of the ARC control panel, adding 8 alarm outputs via RS‑485 , perfect for controlling sirens, lights and external devices. Thanks to the selector jumper , each output can be set to Normally Open (NO) or Normally Closed (NC) for full compatibility with sensors and actuators. The DIP switch addressing (0–15 for ARC9/ARC2 or 1–8 for ARC3008) makes integration easy, while remote firmware upgrade allows maintenance without field intervention. The module operates with 12 V DC power supply, consumes only 1.8 W and operates between –10 °C and +55 °C, ensuring versatility and efficiency even in narrow spaces thanks to its small size.
Further details

Technical data sheet
MODEL |
ARM708-RS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Port |
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AlarmOutput |
8 |
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RS-485 |
1, connected to a maximum of 300 m (984.25 ft) |
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Function |
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Device Address |
0–15 (ARC9 series, ARC2 series) |
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Alarm Output Mode |
Switch between NO and NC with jumper |
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Output Capacity |
30VDC/500mA |
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Update |
Remote update by client software |
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General |
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Power Supply |
12VDC |
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Power Consumption |
1.8W |
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Operating Temperature |
–10 °C to +55 °C (+ 14 °F to + 131 °F) |
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Operating Humidity |
10%–90% (RH) |
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Product Dimensions |
90.0 mm × 62.0 mm × 12.6 mm (3.54" × 2.44" × 0.5") (L × W × H) |
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Net Weight |
≤ 1kg (2.20lb) |