The ZKTeco SRB (Security Relay Box) is a compact single-door security relay controller designed to enhance the security of standalone access control systems. It receives encrypted Wiegand communication from compatible ZKTeco standalone access control terminals and securely controls the connected electric lock, preventing unauthorized access even if the terminal is tampered with.

The SRB features a built-in relay, LED status indicators, and support for electric lock and exit button connections. Its compact size and simple installation make it an ideal accessory for offices, commercial buildings, factories, educational institutions, and residential access control applications requiring an additional layer of security.

Key Features

• Enhances security for single-door access control systems.
• Supports encrypted Wiegand communication from compatible ZKTeco standalone devices.
• Built-in relay for electric lock control.
• Supports electric lock and exit button connections.
• 2 LED status indicators for operation monitoring.
• Configurable lock control delay (default 5 seconds).
• 12V DC power input with low 60mA power consumption.
• Compact dimensions: 50 × 40 × 17 mm.
• Simple installation and reliable operation.
• Compatible with selected ZKTeco standalone fingerprint and RFID access control terminals.