Overview Scenario Specifications Downloads



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



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.








Product Information
Model AO-20W
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 
Supported by S&ST APPs
Embedded App VAST 2 Data Magnet Integration App


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
Dimensions 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 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



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