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SRB, Security Relay Box (SRB) is a value-added and cost effective single door controller to enhance access control in a simple and secure way. It receives encrypted wiegand signal from ZKAccess standalone access control devices to control the lock hence providing high safety for the door.


  • Simple and secure control for single door
  • Encrypt wiegand communication
  • Output contact for electric lock, exit button
  • 2 LED status display
Display2 LED indicator
Built-in Relay1
Reader SupportZKTeco Standalone devices that have wiegand out
Input FormatEncrypt wiegand
Output ContactElectric lock, Exit button
Lock Control DelayDefault 5s (Configurable on fingerprint reader/Software)
Power In12V DC, 60mA
Operating Tem.0 - 70 °C
Operating Humidity10%-90%
Dimension50×40×17 mm