Dahua ASC2204B-S Access Controller

Access Controller

• Supports TCP/IP communication

• Dual protocols: RS-485 and Wiegand (W26/W34)

• Stores up to 100,000 users and 500,000 swipe records

• Supports interlock, group combination, anti-passback, remote unlock, and more

• Alarm support: tamper, intrusion, door sensor timeout, duress, illegal card threshold, incorrect password

• Built-in RTC with manual and automatic time sync

• Power-off memory protection and online firmware upgrade

• Watchdog support for system reliability

• Supports PoE power supply

• Datasheet

 

Access Controller Specifications

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System

• Internet Protocol: IPv4, TCP, UDP

• OSDP Protocol: Supported

• SDK: Available

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Basic

• Appearance: Model B slide rail

• Buzzer: Yes

• Casing Material: PC+ABS

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Functions

• Unlock Modes: Card, remote, password, fingerprint

• Period List: 128

• Holiday Periods: 128

• Network Update: Supported

• First-Card Unlock: Supported

• Remote Verification: Yes

• Blocklist/Allowlist: Supported

• Peripheral Readers:

  • 4 × RS-485

  • 4 × Wiegand

• Multi-door Interlock: Yes

• Group Combination: Card, password, fingerprint

• Real-Time Surveillance: Supported

• Multiple Authentication: Supported

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User Capacity

• User Types: General, VIP, patrol, guest, blocklist, others

• Users: 100,000

• Cards: 100,000

• Fingerprints: 3,000

• Records: 500,000

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Ports

• RS-485: 5 ports

• Wiegand: 4 ports

• Network: 1 × 10/100 Mbps Ethernet port

• Alarm Input: 1 (digital)

• Alarm Output: 1 (relay)

• Exit Button Support: 4

• Door Status Detection: 4

• Lock Control: 4 (default open)

• Alarm Linkage: Yes

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Alarm Functions

• Anti-passback: Yes

• Tamper Alarm: Yes

• Duress Alarm: Yes

• Door Sensor Timeout: Yes

• Intrusion Alarm: Yes

• Illegal Card Threshold Alarm: Yes

• Duress Fingerprint: Yes

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Power & Consumption

• Power Supply Options:

  • Standard PoE (requires separate lock power)

  • DC 12V (supports door lock power)

• Power Consumption:

  • PoE: Standby 1.0W, Working 13.0W

  • DC 12V: Standby 0.8W, Working 41.6W

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Environmental

• Operating Temp: –30°C to +60°C (–22°F to +140°F)

• Humidity: 5%–90% RH (non-condensing)

• Altitude: 0–1300 m (0–4265 ft)

• Environment: Indoor use

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Dimensions & Weight

• Product Size: 210 × 106 × 50 mm (8.27”× 4.17”× 1.97”)

• Package Box: 255 × 166 × 87 mm (10.04”× 6.54”× 3.43”)

• Protective Box: 508 × 265 × 190 mm (20.0”× 10.43”× 7.48”)

• Gross Weight: 0.6 kg (1.33 lb)

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Installation & Certification

• Mounting: Surface or guide rail mount

• Certifications: CE, FCC, UL