Why is the ZKTeco LPR camera relay not opening a boom barrier?
Answered by ANPR AI·Sourced
Short answer
When a ZKTeco camera detects a whitelisted plate but the boom barrier fails to open, the issue often lies in the wiring architecture. If you are integrating via Wiegand to a ZKTeco Security Relay Box (SRB) instead of direct GPIO wiring, you must ensure the camera is outputting an encrypted signal.
Explanation
Installers have two primary ways to physically trigger a barrier gate from a ZKTeco LPR camera: direct dry contact GPIO relays or via a Security Relay Box (SRB). The SRB is a standalone, single-door controller used to enhance physical security by removing the direct relay from the vulnerable edge camera and placing it inside the secure facility.
A frequent failure occurs when installers wire the camera to the SRB using standard, unencrypted Wiegand. The ZKTeco SRB is specifically designed to receive an encrypted Wiegand signal from ZKAccess standalone devices to actuate the lock or barrier. If the camera sends standard unencrypted Wiegand pulses, the SRB will reject the signal for security reasons, and the boom barrier will remain closed despite the plate matching the whitelist.
Things to check
- Determine if your barrier is wired directly to the camera's GPIO pins or if it is routed through a ZKTeco Security Relay Box (SRB).
- Verify the communication mode in the ZKBio software settings.
What to do
If you are utilizing an SRB, you must ensure the encrypted Wiegand protocol is enabled. Log into the ZKBio CVSecurity software, navigate to the System configuration, and verify the communication transmission settings. Ensure the output format matches the controller and that encryption is active so the SRB validates the signal.
If you bypass the SRB entirely, you can simply use the camera's direct GPIO relay, though this sacrifices the physical security enhancement provided by the SRB.
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