440G-TZS21UTRH

Overview of Allen Bradley 440G-TZS21UTRH

The Allen Bradley 440G-TZS21UTRH is a compact, safety-rated guard locking switch engineered for reliable machine guarding. This model features a unique power-to-release solenoid design with solid-state contacts, maximizing operator safety during hazardous operations. It utilizes a robust actuator and coded interlock mechanism to prevent unauthorized access to guarded areas, ensuring compliance with Machinery Safety Standards like ISO 13849-1 and IEC 60947-5-1. The housing, constructed from glass-filled PBT, offers durability and resistance to industrial environments. With cULus, CE, and TÜV certifications, the 440G-TZS21UTRH integrates seamlessly into safety circuits for applications demanding SIL 3 and PLe levels performance. This model provides reliable operation for high-frequency cycling, with a maximum actuation speed of 160 mm/s and a service life proof test interval of up to 20 years.

Key Features of Allen Bradley 440G-TZS21UTRH

• Power-to-release solenoid mechanism for fail-safe guarding
• 2 PNP safety outputs, 1 PNP auxiliary output
• Unique, coded actuator for tamper resistance
• Durable plastic housing with stainless steel actuator part
• 8-pin M12 quick-connect for flexible installation
• Certified for SIL 3 and Performance Level e (PLe)
• Operating voltage range 24V DC (+10% / -15%)
• Max locking force up to 2000 N (steel bolts)
• Temperature rating: -10°C to 60°C
• Unlimited series connection capability for complex safety architectures

Technical Specs of 440G-TZS21UTRH

• Operating Principle: Power to Release
• Safety Outputs: 2 x PNP (max 0.2A)
• Auxiliary Output: 1 x PNP (max 0.2A)
• Operating Voltage: 24V DC (+10% / -15%)
• Locking Force: 2000 N (steel bolts), 1500 N (plastic pins)
• Connection: M12 8-pin, quick-disconnect
• Housing Material: UL certified glass-filled PBT
• Actuator: Stainless steel
• Solenoid Duty Cycle: 33%
• Power Consumption: 50 mA (solenoid off), 120 mA (solenoid on), 260 mA inrush
• Operating Temperature: -10°C to +60°C
• Certifications: cULus, TÜV, CE, UKCA
• SIL 3 (IEC 61508), PLe (ISO 13849-1)

Applications / Use Case

The Allen Bradley 440G-TZS21UTRH is designed for safeguarding access to hazardous machine points in automated production settings. Typical uses include door interlocks on CNC machines, packaging lines, robotic cells, and assembly environments where safety integrity and quick access control are essential. As a power-to-release device, it provides added reliability during power loss scenarios, maintaining a locked position to prevent accidental access. Its unique coded actuator helps prevent defeat and bypass attempts, ensuring policies for stringent safety compliance can be upheld. The 440G-TZS21UTRH supports high-speed operations and unlimited daisy-chaining, making it well-suited for scalable safety architectures in automotive, food processing, semiconductor manufacturing, and other industries. Its seamless integration with Allen Bradley safety relays and controllers offers trusted performance within distributed control systems.

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