Türinterlocks

Türinterlocks, or door interlocks, are electromechanical devices that control door operation to guarantee sequencing, containment, or security in access-controlled environments. By ensuring that one door cannot be opened until another is in a safe state, they help prevent unauthorized entry, control airflow or pressure, and reduce exposure to hazardous conditions. They are used in industrial facilities, laboratories, cleanrooms, pharmaceutical plants, data centers, electrical substations, and in containment zones such as airlocks or nuclear facilities.

Construction and function: A Türinterlock generally comprises a lock mechanism, an actuator (solenoid or motor), position sensors or switches, and a control unit that enforces the interlocking logic. Some installations integrate with access control readers, alarms, cameras, and status indicators. Designs may be fail-safe (unlocking on power loss to permit egress) or fail-secure, depending on safety requirements and the risk assessment. Reliability, redundancy, and ease of maintenance are common considerations.

Types and configurations: Common forms include two-door interlocks that enforce single-door access and prevent simultaneous opening, and multi-door airlocks or containment interlocks that manage sequence and containment. Mechanical interlocks rely on physical latches or cams; electrical interlocks use sensors and actuators with electronic logic. Advanced systems may provide audit trails, remote monitoring, and integration with building management systems.

Standards and safety: Türinterlocks are designed in accordance with applicable safety standards for machinery and guards, such as ISO 14119 for interlocking devices and risk-based design practices. Proper selection, installation, regular testing, and preventive maintenance are essential to ensure functional safety and reliable operation.