SRB
(Security Relay Box)
The SRB (Security Relay Box) is a single-door relay module installed on the secure side of the door. The access terminal outside sends an encrypted Wiegand signal to the SRB inside, and the SRB switches the lock — so opening or tampering with the outside terminal does not open the door.
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.
Functions
- Simple and secure control for single door
- Encrypt wiegand communication
- Output contact for electric lock, exit button
- 2 LED status display
| Model | SRB |
| Display | 2 LED indicator |
| Built-in Relay | 1 |
| Reader Support | ZKTeco Standalone devices that have wiegand out |
| Input Format | Encrypt wiegand |
| Output Contact | Electric lock, Exit button |
| Lock Control Delay | Default 5s (Configurable on fingerprint reader/Software) |
| Power In | 12V DC, 60mA |
| Operating Temp. | 0 - 70 °C |
| Operating Humidity | 10%-90% |
| Dimension | 50×40×17 mm |
When to Use an SRB
- A standalone fingerprint, face or card terminal is mounted outside the door, where it could be tampered with.
- You want the lock relay, exit button and lock wiring inside the protected area.
- A simple, secure single-door set-up is needed without a separate multi-door controller.
The SRB works with standalone devices that provide Wiegand output, as listed in the specifications above. For multi-door sites, see C3 access control panels.
Frequently Asked Questions
The SRB is a value-added, cost-effective single door controller that enhances access control in a simple and secure way.
It receives an encrypted wiegand signal from ZKAccess standalone access control devices and uses it to control the lock, with an output contact for the electric lock and exit button.
It has 1 built-in relay, 2 LED status indicators, runs on 12V DC at 60mA, has a default lock control delay of 5 seconds (configurable), and operates from 0-70°C.
If the lock is wired directly to a terminal mounted outside, anyone who removes the terminal can reach the lock wiring. With an SRB, the lock relay is inside the protected area and only responds to the encrypted signal from the terminal.