Overview
The Allen-Bradley 440G-TZS21UTRH is a Guardmaster TLS-Z GD2 guard locking interlock switch engineered for safety-critical machinery applications. This power-to-release model uses a unique RFID-coded actuator to prevent unauthorized guard bypass and ensures the guard remains locked when power is removed, delivering fail-safe protection for operators and equipment.
Key Features
- Power-to-release locking principle—guard locks automatically on power loss
- RFID-coded actuator per ISO 14119 high-level coding—prevents unauthorized access
- SIL 3 and PLe certified—meets Category 4 safety requirements
- IP69K-rated plastic enclosure—withstands washdown and harsh industrial environments
- Solid-state safety contacts—3 total: 2 NC safety (PNP, 0.2 A max), 1 NC auxiliary (PNP, 0.2 A max)
- 8-pin M12 micro connector—quick disconnect for modular installations
Technical Specifications
- Solenoid Voltage: 24 VDC / 24 VAC
- Safety Contact Outputs: 2 × PNP, 0.2 A max each
- Auxiliary Contact Output: 1 × PNP, 0.2 A max
- Connection Type: 8-pin M12 DCQD connector
- Enclosure Rating: IP69K, NEMA 3/4X/12/13
- Material: Polybutylene Terephthalate (PBT) plastic
- Operating Temperature: −10 to +60 °C
- Weight: 1.49 lb (0.68 kg)
- Actuator Type: Fully-flexible, RFID-coded
- Certifications: SIL 3, PLe, CE, cULus
Typical Applications
- Machine guard interlocks on presses, shears, and punch presses
- Robotic cell access door monitoring and lockout
- Packaging machinery and conveyor safety gates
- Washdown and food processing equipment protection
- Automotive assembly line safety stations
Compatibility & Replacements
The 440G-TZS21UTRH integrates seamlessly into existing Guardmaster TLS-Z safety ecosystems. The replacement actuator is catalog number 440G-A27143. For legacy 440G TLS-Z systems or configurations requiring different locking modes, contact Rockwell Automation for equivalent models. The M12 8-pin connector design ensures reliable integration with modern control networks and modular safety architectures.
