The Allen Bradley Guardmaster TLSZR-GD3 Safety Switch, model 440G-TZS21UTRH, is a high-performance guard locking switch designed to enhance safety in industrial environments. This device ensures that access to hazardous areas is securely controlled, preventing unintended machine operation and protecting personnel.
Key Features
- Power-to-Release Mechanism: The switch employs a power-to-release operation, meaning the guard remains locked until power is applied to release it. This feature ensures that the guard cannot be opened during a power loss, maintaining safety integrity.
- Unique Coded Actuator: Equipped with an RFID-coded actuator, the TLSZR-GD3 offers high tamper resistance and ensures that only the designated actuator can unlock the switch, enhancing security.
- Solid-State Outputs: The device features two normally closed (N.C.) safety outputs and one normally open (N.O.) auxiliary output, all utilizing solid-state technology for reliable performance.
- High Locking Force: With a maximum locking force of 1950 N (plastic pins) or 2600 N (steel bolts), the switch provides robust protection against forced entry.
- Durable Construction: Housed in a UL-approved glass-filled PBT enclosure, the switch is designed to withstand harsh industrial conditions.
- Environmental Resilience: The TLSZR-GD3 is rated for NEMA 3, 4X, 12, 13, and IP66/IP69K, ensuring resistance to dust, water, and high-pressure washdowns.
- Flexible Connectivity: It comes with an 8-inch pigtail featuring an M12 8-pin quick-disconnect connector, facilitating easy installation and maintenance.
Technical Specifications
- Operating Voltage: 24V DC (+10% / -15%)
- Current Consumption:
- Solenoid not energized, no output load: 75 mA
- Solenoid energized, no output load: 120 mA
- Inrush current: 350 mA
- Mechanical Life: 1,000,000 cycles
- Operating Temperature Range: -10°C to +60°C (14°F to 140°F)
- Actuation Speed: Maximum 160 mm/s (6.29 in/s)
- Certifications: CE Marked, UKCA Marked, cULus Listed (UL 508), TÜV Certified
The Allen Bradley Guardmaster TLSZR-GD3 Safety Switch 440G-TZS21UTRH is an essential component for ensuring machine safety, offering reliable guard locking with advanced features tailored for demanding industrial applications.















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