Allen Bradley Guardmaster 440G-LZ Series Solenoid Interlock Switch, Power to Lock, 24V dc, Actuator Included

Enhance machine safety and provide vital protection for personnel in your workplace with the Allen-Bradley Guardmaster 440G-LZS21STLH Guard Locking Switch.

This switch provides secure electrical interlocking of a machine’s control circuit to the guard door, ensuring that your guard or gate remains safely locked until the machine has come to complete stop. It is perfectly designed for partial body access guard doors and combines efficient microprocessor technology with an RFID coded actuator. It features a secure locking bolt drive mechanism that only locks when the correct actuator is detected. The locking bolt is continuously monitored for correct insertion within the actuator.

The 440G-LZS21STLH switch has power to lock functionality; when power is applied to the solenoid the tongue is locked in the switch. When power is removed the lock is then released, and the tongue may be extracted from the switch. This decreases the risk of interruption and damage to the machine while it is still in motion, thereby minimising downtime and allowing you peace-of-mind. It also protects personnel from risk of injury by accidental or deliberate interference with dangerous machine processes.

The Allen-Bradley Guardmaster range features innovative, high-quality machine safety devices which are designed to provide essential protection and improve functional efficiency of machinery in your workplace. Their wide range of reliable, rigorously tested products ensures that you can find the perfect solution for your industrial application and maximise your productivity.

• Holding force of 1300N (292 lbs)
• Consumes up to 60% less power than other guard locking switches due to its bi-stable solenoid design and advanced algorithms, making it a truly ’green’ safety solution
• Bright 270 degree wrap-around LEDs provide status and smart local diagnostics
• TÜV certified to Ple, Cat. 4 (EN/ISO 13849-1), giving it the highest level of safety for guard door position and lock monitoring
• Can be connected directly or in series with other PLe, Cat 4 rated safety devices

A solenoid interlock switch is a type of safety switch with an internal solenoid; a wire coil which converts electrical energy to mechanical. This type of interlock mechanism prevents access to hazardous areas where machinery is in motion by ensuring that that safety barriers remain securely locked. The guard can only be released through either energising (Power to unlock) or de-energising (Power to Lock) the solenoid with an external signal.

These safety devices are used on machine guards and gates to prevent access to un-safe areas where machinery may continue to run after the power supply is cut off, and where immediate access could harm operators and damage machinery; for example, with fast rotating machines used in manufacturing industries.