YLI YB-500U – Electric Drop Bolt – 1000 kg – for Frameless Glass Doors

The YB-500U drop bolt from the YB series provides very reliable, heavy-duty locking for access control systems. It is designed specifically for all-glass doors or other doors without a frame.

With a holding force of 1000 kg and fail-safe operation (unlocked when unpowered / NC), the YB-500U offers maximum physical security without compromising escape safety during a power failure.

Key benefits

• Huge holding force (1000 kg): exceptionally high mechanical resistance to forcing and break-in attempts.
• Fail safe (NC): unlocks automatically on power loss, so escape routes always stay safe and accessible.
• Bidirectional: suitable for doors swinging in both directions.
• Adjustable locking delay: 0, 3, 6 or 9 seconds, so the bolt doesn't shoot out before the door has come to rest.
• Built-in door sensor (NC/COM): real-time status feedback to your access control or alarm system.
• Wide temperature range: works reliably from −40 °C to +60 °C.

Specifications