AO-20W 

Wiegand Converter

The Wiegand protocol is commonly used in traditional access control systems, which grant access to drivers based on their badge with valid Wiegand ID numbers. In order to easily upgrade existing access control systems with the power of VIVOTEK LPR cameras, VIVOTEK’s onboard ANPR software can link license plates to specific Wiegand ID numbers (eg. driver’s badge). In the meantime, the VIVOTEK Wiegand converter can convert the Ethernet signal to Wiegand output signal in order to work with the existing access control system.

Moreover, with VIVOTEK’s ANPR software, you can also easily configure a mapping list to link plate numbers to specific ID numbers and set specific actions to individual groups.


Key Features

  • Easy Integration into any Access Control System
  • Use in Combination with the ANPR Access Service
  • Supports Ethernet to Wiegand Output Conversion
  • Supports 26-bit and 34-bit Wiegand Format


  • Model
  • AO-20W
  • Hardware
    TCP Server
  • 10/100 Mbps Base T Ethernet <--> RS485
  • (Auto-detection by order: RS232, RS232+RS485)
    Server Port 0
  • Baud rate: 2400 bps - 115200 bps
  • Support TCP/Server, TCP/Client, UDP mode
  • Server Port 1
  • Baud rate: 2400 bps - 115200 bps
  • Support TCP/Server, TCP/Client, UDP mode
  • Maximum Wiegand Output
  • Up to 96 bits
  • PoE
  • No
  • General
    Connectors
  • Digital input x 8
  • Digital output x 4: relay output x1 & digital output x3
  • (DO1, DO2 = WG data 1, data 0 when using Wiegand protocol)
    LED Indicator
  • 9 LEDs for power, communication
  • Power Input
  • DC 9 ~ 24V
  • Power Consumption
  • Max. 2W
  • Dimension
  • 106.5 (L) x 66.3 (W) x 27.7 (H) mm
  • Weight
  • 86 (±5) g
  • Safety Certifications
  • FCC, CE, RoHs
  • Operating Temperature
  • Starting Temperature: -25°C ~ 85°C (14°F ~ 185°F)
  • Working Temperature: -20°C ~ 65°C (-4°F ~ 149°F)
  • Humidity
  • Storage: 5% ~ 95%
  • Working: 20% ~ 90%
  • Buffer
  • 1K each channel
  • Surge Protection
  • Power: 30 Volt, bi-directional avalanche breakdown device
  • RS485 6.5 Volt, bi-directional avalanche breakdown device
  • 400W peak power dissipation
  • Clamping time < 1 picosecond (theoretical)
  • Fuse Protection
  • Power PTC 150mA / RS485 PTC 30mA
  • Software
    Software Setting
  • 701Server, 701Client HTTP web browser
  • Operating System
  • Windows 7/8/10
  • Win Server 2008/2012/2016
  • Watchdogs
  • Yes, build in watchdog for system error handling
  • Datasheet Download
    Manual Download

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