Overview
The Allen-Bradley 440G-EZS21STL05H is a Guardmaster electromagnetic guard locking switch designed for critical machine safety and access control applications. This switch combines a magnetic actuator with Power to Lock (PTL) operation and a 500N holding force, providing reliable door and guard position monitoring in industrial environments. The unit features a compact design with M12 connector for quick, reliable connections in harsh factory conditions.
Key Features
- Power to Lock (PTL) magnetic operation with 500N holding force
- Dual safety and auxiliary contact configuration for redundant monitoring
- M12 QD 8-pin connector with 6-inch pigtail for quick disconnect
- 5mm tolerance to misalignment for flexible installation
- Magnetic actuator requires no solenoid—simple integration into safety circuits
- Aluminum construction for corrosion resistance
Technical Specifications
- Model: 440G-EZS21STL05H
- Type: Guard Locking Switch (Guardmaster Electromagnetic)
- Operating Voltage: 24 VDC
- Holding Force: 500N
- Contact Configuration: 2 N.C. Safety, 1 N.O. Auxiliary
- Actuator: Magnetic
- Connector: M12 QD, 8-pin
- Pigtail Length: 6 inches (150 mm)
- Material: Aluminum
- Contacts (Safety & Aux): 2 x PNP
- Certification: CE, TUV General Safety, UL Listed, Australian RCM, Korean KC
Typical Applications
- Machine guard and access door interlocks
- Press and molding machine safety control
- Automated production line gate protection
- Conveyor system guard monitoring
- Assembly machinery enclosure safety
- Safety control systems requiring dual-channel monitoring
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix safety modules
- Rockwell Automation safety I/O networks
- EtherNet/IP safety devices and networks
- PROFISAFE-compatible industrial safety systems
- Standard 24 VDC industrial control systems
- Guardian safety relay modules
Replaces / Drop-In Replacement For
- Previous generation 440G-EZ safety switches without PNP contact configuration
- Manual-operated mechanical interlock switches in safety applications
- Verify compatibility with your system integrator before ordering
Works With
- Rockwell Studio 5000 safety controllers
- Allen-Bradley TLS-GD2 safety control series
- Standard 24 VDC safety relay circuits
- EtherNet/IP and PROFINET safety protocols
- Dual-channel safety monitoring systems
