Viking LDB-3 Strobe Controller

Provide dependable visual and system-level alerts for emergency phones and access systems with the Viking Electronics LDB-3 Strobe Controller, an advanced ring/loop detector designed for security and surveillance applications. The LDB-3 continuously monitors an analog line for ring voltage and off-hook loop current, and uses a built-in relay to trigger strobes, cameras or other notification devices the moment activity is detected. With selectable ring and off-hook detection, a ring cadence mode, and a disable input for two-button emergency phones, the LDB-3 prevents false activations while ensuring critical events are highlighted.

Built to integrate easily into intercom and monitoring setups, the unit offers screw terminal connections, one set of normally open/normally closed relay contacts, and a switched 12 VDC, 0.35 A output to power external lights or surveillance gear. Its compact, wall-mountable form factor and TAA/NDAA compliance make it ideal for institutional, municipal and corporate security installations. Add the Viking LDB-3 to your emergency communications, access control or surveillance system to ensure line events generate clear, reliable visual alerts—order or contact sales to specify for your project.

• Provide reliable visual alerts for emergency and intercom systems by activating strobes or cameras when a phone rings or goes off-hook
• Flexible detection with selectable ring and off-hook/loop monitoring plus ring cadence option to suit varied installation needs
• Built-in relay with NO/NC contacts and switched 12 VDC (0.35 A) output to power external lights or surveillance devices during alarm conditions
• Disable input prevents false activations on two-button emergency phones, preserving normal Info calls while enabling emergency notifications
• Compact, wall-mountable design with screw terminal wiring and TAA/NDAA compliance for government and security deployments