440G-TZS21UTLH
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Overview of Allen Bradley 440G-TZS21UTLH
The Allen Bradley 440G-TZS21UTLH is a guard locking safety switch designed for industrial safety applications. Part of the Guardmaster 440G TLS-Z GD2 series, this power-to-lock solenoid interlock switch ensures secure door or guard locking with integrated lock state monitoring. Operating at 24V DC, it is built to deliver reliable access control in safety circuits where maintaining a guard closed is critical to personnel protection and machine compliance. The compact design features a fully-flex actuator and utilizes solid-state PNP outputs for safety and auxiliary signals, suitable for various automation systems. Its rugged construction includes an IP67-rated enclosure, making it suitable for harsh environments while meeting strict safety standards such as SIL 3 and PLe Cat 4. This switch is preferred in setups requiring high holding force and dependable lock monitoring to prevent unauthorized access or accidental guard opening, enhancing workplace safety effectively.Key Features of Allen Bradley 440G-TZS21UTLH
- Power-to-lock solenoid locking function for secure guarding
- Integrated lock state monitoring for enhanced safety feedback
- Operating voltage: 24V DC with a tolerance of +10% / -15%
- Two PNP safety outputs and one PNP auxiliary output (0.2A max)
- Holding force up to 2000 Newtons ensuring strong locking capability
- Fully-flex actuator design compatible with multiple guard configurations
- Enclosure rated to IP67 for protection against dust and water immersion
- Compact, durable plastic body suitable for industrial conditions
- Certified to SIL 3 and PLe Cat 4 standards for safety system integration
- Supports quick installation with M12 8-pin Micro connector interface
Technical Specs of 440G-TZS21UTLH
| Specification | Details |
|---|---|
| Operating Voltage | 24V DC (+10% / -15%) |
| Safety Outputs | 2 x PNP (0.2 A max each) |
| Auxiliary Output | 1 x PNP (0.2 A max) |
| Holding Force | 2000 N (450 lbs) |
| Connection Type | 8-Pin Micro (M12) conduit entry |
| Enclosure Rating | IP67 |
| Operating Temperature | 0 to 55 °C (32 to 131 °F) |
| SIL / Safety Certification | SIL 3, PLe Cat 4 |
| Material | Durable plastic body with red color |
Applications / Use Case
The Allen Bradley 440G-TZS21UTLH is ideal for use in automated manufacturing, processing plants, and machine safety systems where secure guarding and controlled access are mandatory. It is commonly used to monitor access doors on machinery, conveyors, or robotic cells ensuring that equipment cannot operate unless safety guards are properly closed and locked. The lock state monitoring function provides real-time status feedback to PLCs or safety controllers, enabling precise machine shutdown or startup sequences in compliance with industrial safety standards. Its corrosion-resistant and IP67 enclosure makes it suitable for food, beverage, pharmaceutical, and outdoor installation environments where washdown and exposure to contaminants occur. This switch supports safety systems aligned with IEC 61508 and ISO 13849 norms, helping users meet safety regulations while optimizing machine availability and productivity.Related Resources
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